POWER ELECTRONICS

POWER ELECTRONICS

	SCR RELATED TRAINERS

	IGBT / MOSFET RELATED PRODUCT

	OTHER PRODUCTS

	POWER ELECTRONICS ACCESSORIES

POWER ELECTRONICS TRAINERS

	IGBT / MOSFET RELATED PRODUCT

	A . IGBT, MOSFET, SCR, TRIAC, DIAC CHARACTERISTICS STUDY TRAINER (PEC16M1-A)
	B. IGBT/MOSFET BASED LOW VOLTAGE APPLICATION TRAINERS.
	C. IGBT/MOSFET BASED HIGH VOLTAGE APPLICATION TRAINERS
	D. IGBT/MOSFET BASED AC/DC DRIVES
	E .DC-DC CONVERTER /SMPS TRAINER


A. IGBT/MOSFET STATIC AND DYNAMIC CHARACTERISTICS TRAINER [TOC]

1. BJT, IGBT, MOSFET - Characteristics Trainer (PEC16M1)
2. IGBT, MOSFET, SCR, TRIAC, DIAC Characteristics Study Trainer (PEC16M1-A)
3. IGBT Characteristics Trainer (VPET - 202)
4. Transient Characteristics of SCR and MOSFET (VPET - 216)
5. Characteristics of MOSFET & IGBT (VPET - 202A)
6. Mesurement of Pinch-OFF Voltage of MOSFET (PEC-16-M1-F)


1. BJT, IGBT, MOSFET - CHARACTERISTICS TRAINER (PEC16M1) [TOC]

Basic switching characteristics study trainer.Consists of three separate sections for IGBT, MOSFET and BJT power circuit. Each sections consists of power device and driver section and fixed load resistors.
Transistorized Darlington amplifier used for driver circuit. One no. fixed +15V / 1Amp DC power supply for power section input. One no. toggle switch used to ON/OFF +15V DC with LED indication. 555 IC based square wave generation for device base input. One no. toggle switch to select two range of frequency. For IGBT/MOSFET characteristics switching frequency is 5KHz and for BJT 7 KHz. All three sections base/gate input and collector/drain inputs are terminated at banana sockets
SUGGESTED EXPERIMENTS FOR ALL THREE DEVICES
Measurement of On- delay period (T_D - ON) Measurement Rising period (T_R) Measurement of Turn - On period (T - ON) Measurement of Conduction period (T) Measurement of Storage period (T_S) Measurement of Falling period (T_F) Measurement of Turn - OFF period (T-OFF) Measurement of OFF - period

2. IGBT, MOSFET, SCR, TRIAC, DIAC CHARACTERISTICS STUDY TRAINER(PEC16M1-A)[TOC]

Features
Basic static characteristics study trainer. LM 723 based variable DC power supply (0-30V) for SCR Vak. LM 723 based variable DC power supply (0-12V) for gate voltage of all devices.
Separate section for SCR/TRIAC caracteristics. Separate section for IGBT/MOSFET characteristics. Two No’s fixed load resistor for all devices. Four No’s potentiometer to vary all voltages. LED indication for all power supply. Three No’s. digital multimeter for measurement of device parameters. 230V AC input with Power ON/OFF switch.
SUGGESTED EXPERIMENTS :
Study of VI characteristics of SCR. Study of VI characteristics of TRIAC. Study of Transfer characteristics of MOSFET. Study of Transfer characteristics of IGBT, Study of Dynamic characteristics of MOSFET. Study of Dynamic characteristics of IGBT

3. IGBT CHARACTERISTICS TRAINER (VPET - 202) [TOC]

Features
Consists of one IGBT power deviceOne no. of 12V fixed DC power supply and one no.of 30V fixed power supply for characteristics of IGBT One no.of potentiometer to vary the gate current One no. of potentiometer to vary the collector current Fixed load resistor Power ON/OFF switch provided All necessary points terminated in the front panel Provision for connecting ammeter and voltmeter

4. TRANSIENT CHARACTERISTICS OF SCR AND MOSFET (VPET - 216) [TOC]

Make : Vi Microsystems Model : PEC16M1D
a).Transient Characteristics of SCR :
One SCR (TYN 612) with proper heat sink Turn-ON transient (OR) turn off transient characteristics can be studied. IC Based square wave generation for VAK and VGK One No. of fixed load resistor.
b).Transient Characteristics of MOSFET :
One IRF840 MOSFET with heat sink One no. 15V/30V power supply (Built-in) for VDS One no. of 555 based square wave generation with transistor driver circuit One no. of fixed load resistor.
c). Power Supply :
230V AC Input, ±15V DC for control circuit Power ON/OFF switch with indication.

5. CHARACTERISTICS OF MOSFET & IGBT (VPET - 202A) [TOC]

Consists of one IGBT and one MOSFET power device One no. of step down transformer, diode bridge rectifier and Filter capacitor and 7812 regulator forms +12V DC, 30V DC supply for device voltage variation.
One no. of potentiometer to vary the collector current Fixed load resistor Power ON/OFF switch provided All necessary points terminated in the front panel Provision for connecting ammeter and voltmeter

6. MEASUREMENT OF PINCH-OFF VOLTAGE OF MOSFET (PEC-16-M1-F) [TOC]

The static characteristics of the devices SCR, MOSFET & IGBT can be studied using this module.
FEATURES
Consists of power devices SCR, TRIAC, MOSFET, IGBT Two no. of 12V fixed DC power supply and one no of 30V fixed power supply for characteristics of all devices. Two no of potentiometer to vary the gate/base current. Two no of potentiometer to vary the Anode/collector current.
Fixed load resistor LED indication for 12V, 30V Power On/Off switch provided. All necessary points terminated in the front panel. Provision for connecting ammeter and voltmeter. 3 meters are provided to measure the various power devices current and voltage to find the static characteristics.

B. IGBT/MOSFET BASED LOW VOLTAGE APPLICATION TRAINERS. [TOC]

1. Single Phase MOSFET Module (PEC16M2)
2. IGBT Device Module (PEC16M3)
3. Inverter Control Circuit (PEC16M4#1)
4. Single Phase Single Pulse Inverter Control Circuitry (PEC16M4#2)
5. Chopper Control Circuitry (PEC16M5)
6. Three Phase MOSFET Power Module (PEC16M2#3)
7. Three Phase IGBT Power Module (PEC16M3#3)
8. Three PHASE PWM INVERTER CONTROL MODULE.(PEC16M4#3φ)
9. IGBT Based Chopper Circuit (PEC16M3 / M5)
10. Two Phase IGBT Based Chopper (PEC16M3A)
11. DC Motor Control Using H-Bridge (PEC-16M3C)

1. SINGLE PHASE MOSFET MODULE (PEC16M2) [TOC]

Four no. IRF840 MOSFET with heatsink and snubber circuit. 6N137 High speed opto for gate PWM isolation. IR2112 / 2110 Driver IC for gate PWM drive. IC Based dead time logic circuit implemented to avoid pulse shoot through.
Built in 50 / 30V DC, 2Amp for power circuit input. Over current protection circuit implemented with LED indication. All devices terminated individually for different configuration. By suitable interface with external firing module (PEC16M4 / M5 - optional) it can be work as
Single quadrant chopper Two quadrant chopper Four quadrant chopper unipolar Four quadrant chopper bipolar Single phase SPWM inverter. Single phase single pulse inverter.
All four device gate pulse inputs are terminated on the front panel for external interface (Microprocessor / MC / DSP). 230V AC input, +15V / - 15V DC for control circuits. Optionally a hall-effect current transducer provided for current measurement.

2. IGBT DEVICE MODULE (PEC16M3) [TOC]

Four no. IRGBC - 20S IGBT with heatsink and snubber circuit. 6N137 high speed opto for gate PWM isolation. IR2112 / 2110 Driver IC for gate PWM drive. IC Based dead time logic for delay circuit.
Built in 50 / 30V, 2Amp DC for power circuit input. Over current protection circuit with LED indication. All devices terminated individually for different configuration. By suitable interface with external firing module (PEC16M4 / M5) it can be work as 1.Single quadrant chopper 2.Two quadrant chopper 3.Four quadrant chopper unipolar 4.Four quadrant chopper bipolar 5.Single phase SPWM inverter 6. Single phase single pulse inverter All four device gate pulse inputs are terminated on the front panel for external interface(MP / MC / DSP, etc.,). 230V AC Input , +15V / -15V DC for control circuits. Optionally a hall-effect current transducer provided for current measurement.

3. INVERTER CONTROL CIRCUIT (PEC16M4#1) [TOC]

Four no. gate signal to trigger four IGBT / MOSFET. IC Based carrier (triangular) wave generation with variable frequency. One no. potentiometer used to vary the carrier frequency (2KHz to KHz). IC Based reference sine / square / trapezoidal wave generation with variable amplitude & frequency. One no. rotary switch to select different type of reference waves.
Two no. potentiometer used to vary the frequency, amplitude of reference signal. LM311 Based comparator circuit. it compares carrier & reference wave. One no. rotary switch to select PWM for different types of modulation sin / trapezoidal/ square. One no. toggle switch with debounce logic for PWM ON/OFF. All four PWM outputs are terminated on the front panel for device module interface (PEC16M2 / M3). 230V AC Input, +15V / -15V DC for control circuits. This module can be interfaced with IGBT module (PEC16M3) or MOSFET module (PEC16M2). The following experiments can be done using this firing module & device module combination. 1.Single phase sine PWM inverter. 2.Single phase square PWM inverter. 3.Single phase trapezoidal PWM inverter.

4. SINGLE PHASE SINGLE PULSE INVERTER CONTROL CIRCUITRY (PEC16M4#2) [TOC]

Four no. gate signal to trigger four IGBT / MOSFET. IC Based carrier (triangular) wave generation with variable frequency. One no. potentiometer used to vary the carrier frequency (2KHz to 4KHz). IC Based reference square wave generator with variable amplitude.
Potentiometer used to vary the frequency, amplitude of reference signal. LM311 Based comparator circuit. It compares carrier & reference wave. One no. toggle switch for PWM ON / OFF. All four PWM outputs are terminated on the front panel for device module interface. 230V AC input. +15V / -15V DC for control circuits. This module can be interfaced with IGBT module (PEC16M3) or MOSFET module (PEC16M2). The following experiments can be done using this firing module & device module. 1. Single phase single pulse square PWM inverter.

5.CHOPPER CONTROL CIRCUITRY (PEC16M5) [TOC]

Four no. gate signal to trigger four IGBT/MOSFET. IC Based carrier (triangular) wave generation with variable frequency. Potentiometer used to vary the carrier frequency (2KHz to 4KHz). LM311 Based comparator circuit. it compares carrier & control voltage.
One no. potentiometer used to vary the control voltage so as to vary the duty cycle ratio of PWM (5% to 95%). IC Based control logic circuits for generation of PWM for different type of chopper (Single/Two/Four quadrant). One no. rotary switch to select PWM for different types of chopper circuits. One no. toggle switch for PWM ON/OFF. All four PWM outputs are terminated on the front panel for device module interface (PEC16M2/M3). 230V AC Input, +15V / -15V DC control circuits. This module can be interfaced with IGBT module (PEC16M3) or MOSFET module (PEC16M2) optionally.
The following experiments can be using this firing module & device module Combination.
Single quadrant chopper Two quadrant chopper Four quadrant chopper - unipolar Four quadrant chopper - bipolar

6. THREE PHASE MOSFET POWER MODULE (PEC16M2#3) [TOC]

Power Module is designed for Motor control Applications and UPS Application. IGBT & DIODE used as power device. Input : 1 Phase 50 Hz AC.
Output : i. 3φ AC (V/F) control for 3 φ drive applications ii. 3φ AC Output for UPS Applications (Voltage control) 1200V, 25A, 3 Phase IGBT Inverter Bridge Additional Features 1200V, 25A converter Bridge for AC-DC power conversion 1 No. of Hall Effect current sensors to sense the output current of the Inverter Bridge All the PWM signals are isolated using Opto Isolator Protection circuit for over current with LED indication Independent Power supplies for all Isolated circuits. Voltmeter to Indicate the DC Link Voltage All current, PWMS & Feedbacks are terminated at Front panel FRC Connectors are provided to Interface with the External digital controllers All the Input/Output Lines are Terminated at Banana sockets.

7. THREE PHASE IGBT POWER MODULE (PEC16M3#3) [TOC]

Power Module is designed for Motor control Applications and UPS Application. IGBT & DIODE used as power device. Input : 1 Phase 50 Hz AC.
Output : i. 3φ AC (V/F) control for 3 φ drive applications ii. 3φ AC Output for UPS Applications (Voltage control) 1200V, 25A, 3 Phase IGBT Inverter Bridge Additional Features 1200V, 25A converter Bridge for AC-DC power conversion 1 No. of Hall Effect current sensors to sense the output current of the Inverter Bridge All the PWM signals are isolated using Opto Isolator Protection circuit for over current with LED indication Independent Power supplies for all Isolated circuits. Voltmeter to Indicate the DC Link Voltage All current, PWMS & Feedbacks are terminated at Front panel FRC Connectors are provided to Interface with the External digital controllers All the Input/Output Lines are Terminated at Banana sockets.

8.THREE PHASE PWM INVERTER CONTROL MODULE.(PEC16M4#3φ) [TOC]

This module provides the gating signals for a three phase full bridge inverter obtained through a sine pulse width modulation (PWM) technique.
FEATURES:
It generates 6 Nos. of PWM to trigger the 6 IGBTs provided in the device module for Inverter application (Device module Optional) Sine PWM technique is used. 3 Phase sine wave (with 120 phase shift) generated through ICs
Frequency and amplitude (V,F or V/F) can be controlled by adjusting potentiometer One no.of carrier wave generation block (Generate 3KHz Frequency) 3 Nos. of PWM IC generate PWM with comparison of each phase & carrier wave 3 PWM inverted by using NOT gate Final output of 6 PWM used to trigger 6 Nos. of IGBT/MOSFET (Device module) with frequency, amplitude control Test points are provided to check the waveforms at various stages of the PWM circuitry Built in power supplies for the control circuitry, 230V, 50Hz, ±15V & 5V. The module is bought out in a sleek box.

9. IGBT BASED CHOPPER CIRCUIT (PEC16M3 / M5) [TOC]

It consists of four quadrant chopper control circuit, IGBT power circuit, load etc.,
CHOPPER CONTROL CIRCUIT
IC Based carrier (triangular) wave generation with variable frequency. One no. potentiometer used to vary the carrier frequency (2KHz to 4KHz). LM311 Based comparator circuit. It compares carrier & control voltage.
One no. potentiometer used to vary the control voltage so as to vary the duty cycle ratio of PWM (5% to 95%). IC Based control logic circuits for generation of PWM for different type of chopper. One no. rotary switch to select PWM for different types of chopper circuits. (single, two, four - quadrant chopper).
IGBT POWER CIRCUIT
Four no. IRGBC - 20S IGBT forms H-Bridge circuit. Necessary IGBT terminations for single quadrant chopper / two quadrant chopper. LM723 Based 24V DC power supply with O/C, S / C protection. One no. toggle switch, fuse protection and LED indication for 24V DC supply. One no. fixed resistive and inductive load, 5V DC (back - EMF) provided. All four PWM inputs are terminated on the front panel for device module interface. 230V AC input, +15V / - 15V DC for control circuits.

10. TWO PHASE IGBT BASED CHOPPER(PEC16M3A) [TOC]

This trainer consists of i). IGBT based power circuit ii). Chopper PWM control circuit.
IGBT Power circuit
Two nos. of 1MBH-60D-090A IGBT used as power switch mounted with suitable heat sink with necessary snubber circuit Two nos. of high frequency inductor used for power circuit High speed opto used for IGBT PWM isolation IR2110 IC used as IGBT driver 24V DC,2A Provided for power circuit input
PWM Control Circuit
IC/Digital controller based PWM generation Provision to vary duty cycle ratio Provision to vary phase shift of two chopper PWMs 5KHz Frequency operation Necessary test points provided to view waveform in CRO 230V AC Input, ±15V DC for control circuit All are mounted in a nice cabinet.

11. DC MOTOR CONTROL USING H-BRIDGE (PEC-16M3C) [TOC]

One no. of IC H -Bridge (L 298) used for power circuit IC based PWM Generation with variable duty cycle ratio One Potentiometer used to vary duty cycle ratio (10% - 90%) 12V PMDC Motor used as load 230V AC I/O, +15V DC for control circuit All components are placed in a PCB, fixed on a cabinet.

C. IGBT/MOSFET BASED HIGH VOLTAGE APPLICATION TRAINERS [TOC]

1. IGBT Based Single Phase Inverter (PEC16HV1#1)
2. MOSFET Based Single Phase Inverter (PEC16HV1A)
3. IGBT Based Three Phase Inverter (PEC16HV2)
4.Three Phase Input IGBT Based Three Phase Inverter (PEC16HV5)
5. DC Motor Control Using IGBT Chopper (PEC16HV3-S)>
6. IGBT Based Four Quadrant Chopper (PEC16HV3)
7. Three Phase Input IGBT Based Four Quadrant Chopper (PEC16HV7)
8. UPS Trainer (PEC16HV4)
9. DSP Based 500VA UPS Trainer (PEC16HV-DSUPS)
10. IGBT Based Three Phase PWM Inverter (EC16HV2A)

1. IGBT BASED SINGLE PHASE INVERTER (PEC16HV1#1)

Four no. IGBT forms H-bridge single phase sine PWM inverter. Sine triangle PWM generation for IGBT . Switching frequency 2.5KHz. One potentiometer used to vary the reference sine wave frequency (10 - 50Hz)
One potentiometer used to vary the reference sine wave amplitude (0 - 10V) High speed opto coupler used for gate PWM isolation. IR2110 / IR2130 Driver IC used for IGBT gate PWM drive. Two no. hall-effect current sensor for output, DC current measurement and protection. LED Indication for over current, short circuit condition. Diode bridge converter and filter capacitor for input DC voltage of IGBT inverter power circuit. One voltmeter indicate DC rail voltage, MCB for input ON/OFF, over current.
SPECIFICATION
Input voltage : 230V AC, 50Hz. Output voltage : [0-200V]AC (Variable voltage) [10-50Hz] (Variable frequency) Output rating : 5Amp. Motor / RL load can be used as load open/closed loop possible (optional).

2. MOSFET BASED SINGLE PHASE INVERTER (PEC16HV1A) [TOC]

Four no. MOSFET forms H-bridge single phase sine PWM inverter. Sine triangle PWM generation for MOSFET. Switching frequency 2.5KHz. One potentiometer used to vary the reference sine wave frequency (10 - 50Hz). One potentiometer used to vary the reference sine wave amplitude (0 - 10V). High speed opto coupler used for gate PWM isolation. IR2110 / IR2130 Driver IC used for MOSFET gate PWM drive. Two no. hall-effect current sensor for output, DC current measurement and protection (optional) LED indication for over current, short circuit condition. Diode bridge converter and filter capacitor for input ON/OFF, over current
SPECIFICATION
Input voltage : 230V AC, 50Hz. Output voltage : [0-200V] AC (variable voltage) [10-50Hz] (variblae frequency) Output rating : 2Amp

3. IGBT BASED THREE PHASE INVERTER (PEC16HV2)

One potentiometer used to vary the reference sine wave (R,Y,B) frequency. One potentiometer used to vary the reference sine wave (R,Y,B) amplitude. High speed opto coupler used for PWM isolation. IR2110 / IR2130 Driver IC used for IGBT gate drive.
Three no. hall-effect current sensor for output, DC current measurement and protection. LED Indication for over current, short circuit condition. Diode bridge converter and filter capacitor for input DC voltage IGBT inverter. One voltmeter indicate DC voltage, MCB for input ON/OFF, over current.
SPECIFICATION
Input voltage : 230V AC, 50Hz Output voltage : Three phase [0 - 200V] AC (variable voltage) each phase,[0-50Hz](variable frequency) each phase, Output rating : 5Amp (each phase). Motor / RL load can be used as load open/closed loop possible (optional).

4.THREE PHASE INPUT IGBT BASED THREE PHASE INVERTER (PEC16HV5) [TOC]

Input voltage : 230V AC, 50Hz Output voltage : Three ix no. IGBT (IPM) forms H-bridge three phase sine PWM inverter. Sine triangle PWM generation for IGBT. switching frequency 2.5HKz.
One potentiometer used to vary the reference sine wave (R,Y,B) frequency. One potentiometer used to vary the reference sine wave (R,Y,B) amplitude. High speed opto coupler used for pulse isolation. Built in driver IC in PWM power circuit. Three no. hall-effect sensor for output, DC current measurement and protection. LED indication for over current, short circuit condition. Three phase diode bridge converter and filter capacitor for input DC voltage for IGBT inverter power circuit. One voltmeter indicate DC rail voltage , MCB for input ON/OFF , over current.
SPECIFICATION
Input voltage : 230V AC, 50Hz. Output voltage : Three phase [0 - 240V] AC (variable voltage) each phase, [10-50Hz] (variable frequency) each phase, Output rating : 10Amp (each phase). Motor / RL can be used a load. open / closed loop possible (optional).

5. DC MOTOR CONTROL USING IGBT CHOPPER (PEC16HV3-S) [TOC]

High speed opto coupler used for pulse isolation. Built in driver IC in PWM power circuit. One no. IGBT forms single quadrant chopper for armature control (open/closed loop operation ) One no. IGBT forms single quadrant chopper for field control. TL494 Based PWM generation for both armature & field circuit.
One potentiometer used to vary the duty cycle ratio of PWM (armature) One potentiometer used to vary the duty cycle ratio of PWM (field) High speed opto coupler used for pule isolation. IR2110 / IR2130 Driver IC used for IGBT gate drive. Two no. hall-effect current sensor for field, armature current measurement and protection. Output over current, short circuit protection with LED indication. Diode bridge converter and filter capacitor for input DC voltage of IGBT chopper. One voltmeter indicate DC rail voltage, MCB for input ON/OFF, over current.
SPECIFICATIONS
High speed opto coupler used for pulse isolation. Built in driver IC in PWM power circuit. Input : 230V AC, 50Hz. Output : Armature circuit [0-200V] DC (variable), 5Amp (suitable 1HP motor) Field circuit, [ 90-220V] DC, 1Amp

6. IGBT BASED FOUR QUADRANT CHOPPER (PEC16HV3) [TOC]

Four no. IGBT forms H-bridge four quadrant unipolar chopper circuit. Separate firing circuit for unipolar PWM generation. (PWM frequency 2 to 5KHz) One potentiometer used to vary the duty cycle ratio. High speed opto coupler used for pulse isolation. IR2112 / IR2130 Driver IC for IGBT gate drive. Three no. hall-effect current sensor for output, DC current measurement and protection. Output overcurrent, short circuit protection with LED indication. Diode bridge converter and filter capacitor for input DC voltage IGBT chopper. One Voltmeter indicate DC rail voltage, MCB for input ON/OFF, over current.
SPECIFICATION
Input voltage : 230V AC, 50Hz. Output voltage : [0 to +200V] DC[0to -200V]DC (variable voltage) Output rating : 5Amp One no. IGBT forms single quadrant chopper (for field circuit). Separate control circuit for field chopper PWM generation. One pot used to vary the duty cycle ratio of PWM. Separate opto, driver circuit provided for single quadrant chopper. Motor / R&L load can be as load. (optional) current.

7. THREE PHASE INPUT IGBT BASED FOUR QUADRANT CHOPPER (PEC16HV7) [TOC]

Four no. IGBT (IPM) forms H-bridge four quadrant unipolar chopper circuit. Separate firing circuit for unipolar PWM generation (PWM frequency 5KHz) One potentiometer used to vary the duty cycle ratio. High speed opto coupler used for opto coupler used for pulse isolation. Built in driver IC for IGBT (IPM) gate drive. Three no. hall-effect current sensor for output, DC current measurement and protection. Output over current, short circuit protection with LED indication. Three phase diode bridge converter and filter capacitor for input DC voltage of IGBT chopper power circuit. One voltmeter indicate DC rail voltage, MCB for input ON/OFF, over current.
SPECIFICATION
Input voltage : 440V AC, 3phase, 50Hz. Output voltage : [0 to 200V] DC [0to-200V] DC (variable voltage) Output rating : +10Ams. Two no. IGBT forms two quadrant chopper. (for field circuit). Separate control circuit for PWM generation. One pot used to vary the duty cycle ratio of PWM. Separate opto, driver circuit provided for two quadrant chopper.

8. UPS TRAINER (PEC16HV4) [TOC]

This set up consists of 24V battery module, battery charger, UPS controller module.
BATTERY
2No. 12V, 60AH Battery connected in series, with fuse protection.
BATTERY CHARGER
SCR Based battery charger. Current set potentiometer for setting charging current. LED indication for over / triggle charge 230V AC input.
UPS CONTROLLER
MOSFET Based push-pull inverter. SG3525 used for PWM generation. Three no. potentiometer used to vary frequency, duty cycle, dead time. Separate cycle for battery level monitoring with low / high volt LED indication. Provision to select online / offline UPS. More than 10 no toggle switch for fault analysis.
SPECIFICATIONS
Capacity : 500V A Input voltage : 24V DC Output voltage : [150 - 230V] AC (variable voltage) [45-55Hz] (variable frequency) Output rating : 2.5A

9. DSP BASED 500VA UPS TRAINER (PEC16HV-DSUPS) [TOC]

This trainer is designed to study the working principle of solar panel powered or SCR Mains converter powered DSP Based UPS system. This trainer consists of,
IGBT Based Single phase SPWM inverter TMS320F2407A DSP based PWM Controller Battery (24V/48V) Solar panel based Battery Charger / SCR Based Battery Charger
a. IGBT/MOSFET Based Single phase SPWM Inverter
Input voltage : 230V AC, 50Hz. Output voltage : [0 to +200V] DC[0to -200V]DC (variable voltage) 4 Nos. of IGBT/MOSFET with suitable heat sink and snubber circuit forms H-Bridge inverter One no. of Inverter transformer used for IGBT output for step-up the voltage and Isolation. One no. of LC Filter used to Filter the inverter output voltage. One no. of Voltage sensing transformer and current sensing transformer for feedback voltage for closed loop and protection. One no. of filter capacitor for DC input.
b. TMS320F2407A DSP Based PWM Controller :
Digital signal processor (TMS320F2407) used to generator 1φ SPWM Pulses to trigger IGBT & to generate single phase converter gate pulse for battery charger. 4 Nos. of PWM output used to generate 4 PWM (IGBT/MOSFET) 2 Nos. of PWM output used to generate 2 Pulses (SCR) 2 Nos. of ADC Used to sense the Inverter output voltage and current for feedback 1 No. of ADC used to read the battery voltage level for monitoring and protection 1 No. of ADC used to read the battery current for protection and monitoring 1 No. of I/O used sense the main AC Status. 6N137 Opto used to isolate the 4 PWMs IR3210 Drive IC used for IGBT gate driver One no. of LCD display used to Indicate the Main Volt & current, Battery voltage & current and Inverter Voltage & current. Provision to select ON line /OFF line UPS.
DSP Controller used for,
To generate sine PWM pulses to trigger IGBT/ MOSFET inverter To generate gate pulses for SCR battery charger To select and control the various functions like, # Inverter closed loop # Inverter over current protection # Solar / SCR Battery charger selection # Mains sensing # SCR Battery charger closed loop operation # Battery charger over current protection # Battery deep discharge/over charge protection # Selection of Solar charger / SCR Charger # Selection of on line/off line mode of operation Display of all parameters like current, voltage and temperature etc.
c. Battery Module
24V/48V, 90 AH Battery Two nos. of 12V Battery connected in series One no. of current sensing transformer and voltage sensing circuits for battery monitoring and protection.
d. Battery Charger
Solar panel based battery charger SCR Mains converter based battery charger
(i). Solar Panel based Battery Charger
1KW / 0.5KW solar panel with necessary accessories to charge 24/48V Battery
(ii). SCR Mains converter based battery charger
2 Nos. of SCR & Diode forms 1φ half controlled converter for battery charging 230V AC Input, 24/48V DC output One no.of LC Filter Two no.of pulse transformer for pulse isolation and pulse amplification circuits
Technical Specifications :
Input : 24V/48V DC Output : 1φ, 230V (Sine wave output) Capacity : 1KW
Protection Circuit :
Inverter over current shut down with buzzer indication Battery deep discharge and over charge cut-off protection with indication Battery over current cut-off protection with indication.
PC Based Software :
Windows based powerful software to operate the DSP based UPS trainer system It displays all parameters of UPS # Inverter Voltage # Inverter current # Battery voltage # Battery current # Temperature # ON line / OFF line mode of operation RS232 interface provision to UPS.

10. IGBT BASED THREE PHASE PWM INVERTER (EC16HV2A) [TOC] [TOC]

This trainer consists of three sections,
Digital controller for i. Sine PWM & Multiple PWM generator ii. PWM Generation for 3 phase AC Drive iii. PWM Generation for 3 phase UPS. 3 Phase IGBT Based power module Battery with charger (Optional)
a. dsPIC 30F4011 Based controller for SPWM/Multiple PWM Generator
Microchip's dsPIC30F4011 16 Bit Digital Signal Controller Operating at 33 nS & 30 MIPS. On Chip - Motor Control Peripherals 6 Motor Control PWM Unit with Programmable Dead Band, 10 Bit, 9 Channel ADC with 500 KSPS, 30 General Purpose I/O Lines, 5 GP Timers, Quadrature Encoder Interface & 4 Input Capture Pins. Memory (On- Chip) # 48K Flash Program Memory. # 2K RAM for Data Memory. # 1K EEPROM Memory. Additional Features # On Chip serial port and the serial port lines are isolated # ADC Input Lines are protected and Terminated # Bead Inductances are provided at VCC & GND for EMI Rejection. #PWM Output Lines are Terminated at a separate FRC Connector. #16x2 Alphanumeric LCD Display and 3 keys Keypad #Switch Mode Power Supply #Input : 180V-230V AC, 50-60 Hz #Output : +5V/3.0A & +/- 12V/500 mA #Protection : Over Current & Short circuit Protection Provision to select different type of PWM control technique (SPWM / Multiple PWM) Provision to select PWM output for UPS/3φ AC Drive applications.
b. 3φ IGBT BASED POWER MODULE
Power Module is designed for Motor control Applications and UPS Application. IGBT & DIODE used as power device. Input : 1 Phase 50 Hz AC. Output : i. 3φ AC (V/F) control for 3 φ drive applications ii. 3φ AC Output for UPS Applications (Voltage control) 1200V, 25A, 3 Phase IGBT Inverter Bridge Additional Features 1200V, 25A converter Bridge for AC-DC power conversion 1 No. of Hall Effect current sensors to sense the output current of the Inverter Bridge All the PWM signals are isolated using Opto Isolator Protection circuit for over current with LED indication Independent Power supplies for all Isolated circuits. Voltmeter to Indicate the DC Link Voltage All current, PWMS & Feedbacks are terminated at Front panel FRC Connectors are provided to Interface with the External digital controllers All the Input/Output Lines are Terminated at Banana sockets. 0.5hp 3φ AC Induction Motor (3φ, 200V, 1415 RPM)

D. IGBT/MOSFET BASED AC/DC DRIVES [TOC]

1. Speed Control of Single Phase Induction Motor Using IGBT Inverter (V/F CONTROL).
2. Speed Control of Three Phase Induction Motor Using IGBT Inverter (V/F CONTROL) PEC16HV2
3.Speed Control of Three Phase Induction Motor Using IGBT Inverter (PEC16HV5)
4. Speed Control of DC Shunt Motor Using IGBT Using Single Quadrant Chopper (PEC16HV3-S)
5. Speed Control of DC Shunt Motor Using IGBT Using Four Quadrant Chopper (SINGLE PHASE INPUT) PEC16HV3.
6. Speed Control of DC Shunt Motor Using IGBT Using Four Quadrant Chopper (THREE PHASE INPUT) PEC16HV7
7. Speed Control of Slip Ring Induction Motor Using IGBT Chopper (PEC14HV10-A).
8. DC Position Control System. (PEC-01)
9. DSP Based DC Motor Position Control (VPET - 107)
10. Amplidyne Characteristics Trainer.
11. Speed Control and Electronics Braking of DC Shunt Motor. [VEDT-01]
12. Electrical Braking Three Phase Induction Motor [VEDT-06]

1. SPEED CONTROL OF SINGLE PHASE INDUCTION MOTOR USING IGBT INVERTER (V/F CONTROL). [TOC]

1. V/F Control of Single phase Induction Motor
This setup consists of ,
Single phase inverter [PEC16HV1] Digital PI Controller 1hp Single phase AC Motor setup Isolation Transformer
a. Single phase inverter [PEC16HV1]
IGBT based sine wave Inverter Output. Input : 230V AC Output : 230V AC @ 5Amp Frequency : 10Hz - 100Hz Housed in a sleek box.
Hall Effect Current Transducers provided to DC link voltage and AC output Protection circuits provided to protect on various conditions. Mimics circuit screen printed in the front panel. More than 8 Test points are provided
POWER CIRCUIT:
Mimics circuit screen printed in the front panel. More than 8 Test points are provided Uncontrolled Bridge rectifier Rated for 600V @ 35Amps for converting AC input to DC link voltage DC link capacitors provided 4 Nos of IGBT to form full bridge Inverter. Snubber circuit is provided to each device.
High speed Optos are provided to isolate gate control circuitry IGBT IC drivers are used to drive switches. Output: 0 to 220Volt AC @ 5 Amp One MCB provided to switch on the AC input to the power circuit One DC Voltmeter provided to measure the DC link voltage One hall-effect current transducer provided in the DC link bus and used for protection. The AC output of IGBT bridge is terminated at banana sockets. One Hall-effect current transducer provided in the AC output line and used for protection. Test points provided on the Front panel (DC-link Current, DC-link Voltage, AC output current) Breaking IGBT with Breaking resistor provided
PROTECTIONS
The protection circuit monitors i) AC output current ii)DC-link voltage iii)DC-link current and takes appropriate protection like Over Voltage, Under Voltage and Over Load
#One LED to indicate the Shut Down condition due to protection. One Reset switch is provided to restart the operation. One Control & Power circuit in DC rail for Breaking over voltage
INPUT CIRCUITRY :
b. Digital PI Controller for Closed loop operation
Intel 8051 Microcontroller based CPU card 2 Row x 16 Column LCD Dot Matrix with back light Display Alphanumeric Display single Channel Single ended Analog Input Range : (0-5)V DC
Single Channel Analog Output (0-5) Volt One I/V Converter and V/I converter provided 4 Number of keys provided to give set point, increment, Decrement function etc. In-Built IC regulated power supply Provision to change any one of the following, Input : (0-5)V Output : (0-5)V
c. 1hp Single phase AC Motor setup :
1hp Single phase Permanent capacitor induction motor 230V AC Input 1400 rpm. Spring balance load setup Speed sensor with digital speed indication with speed feedback facility.(0-5V)
d. Isolation Transformer
Used for power circuit input voltage isolation Input : 230V AC Output : 110-0-110V AC 1KVA Capacity.

2. SPEED CONTROL OF THREE PHASE INDUCTION MOTOR USING IGBT INVERTER (V/F CONTROL) PEC16HV2 [TOC]

Six no. IGBT Forms Bridge type three phase sine PWM inverter. Sine triangle PWM generation with switching frequency 2.5KHz. One potentiometer used to vary the reference sine wave (R,Y,B) frequency.
One potentiometer used to vary the reference sine wave (R,Y,B) amplitude. High speed opto coupler used for PWM isolation. IR2110 / IR2130 Driver IC used for IGBT gate drive. Three no. hall-effect current sensor for output, DC current measurement and protection. LED Indication for over current, short circuit condition. Diode bridge converter and filter capacitor for input DC voltage IGBT inverter. One voltmeter indicate DC voltage, MCB for input ON/OFF, over current.
SPECIFICATION
Input voltage : 230V AC, 50Hz. Output voltage : Three phase [0 - 200V] AC (variable voltage) each phase, [0- 50Hz] (variable frequency) each phase, Output rating : 5Amp (each phase). Motor / RL load can be used as load open/closed loop possible (optional).

3. SPEED CONTROL OF THREE PHASE INDUCTION MOTOR USING IGBT INVERTER (PEC16HV5) [TOC]

Six no. IGBT (IPM) forms H-bridge three phase sine PWM inverter. Sine triangle PWM generation for IGBT. switching frequency 2.5HKz. One potentiometer used to vary the reference sine wave (R,Y,B) frequency. One potentiometer used to vary the reference sine wave (R,Y,B) amplitude. High speed opto coupler used for pulse isolation. Built in driver IC in PWM power circuit. Three no. hall-effect sensor for output, DC current measurement and protection. LED indication for over current, short circuit condition. Three phase diode bridge converter and filter capacitor for input DC voltage for IGBT inverter power circuit. One voltmeter indicate DC rail voltage , MCB for input ON/OFF , over current.
SPECIFICATION
Mimics circuit screen printed in the front panel. More than 8 Test points are provided Input voltage : 230V AC, 50Hz. Output voltage : Three phase [0 - 240V] AC (variable voltage) each phase, [10-50Hz] (variable frequency) each phase, Output rating : 10Amp (each phase). Motor / RL can be used a load. open / closed loop possible (optional)

4. SPEED CONTROL OF DC SHUNT MOTOR USING IGBT USING SINGLE QUADRANT CHOPPER (PEC16HV3-S) [TOC]

Mimics circuit screen printed in the front panel. More than 8 Test points are provided One no. IGBT forms single quadrant chopper for armature control (open/closed loop operation ) One no. IGBT forms single quadrant chopper for field control. TL494 Based PWM generation for both armature & field circuit. One potentiometer used to vary the duty cycle ratio of PWM (armature) One potentiometer used to vary the duty cycle ratio of PWM (field)
High speed opto coupler used for pule isolation. IR2110 / IR2130 Driver IC used for IGBT gate drive. Two no. hall-effect current sensor for field, armature current measurement and protection. Output over current, short circuit protection with LED indication. Diode bridge converter and filter capacitor for input DC voltage of IGBT chopper. One voltmeter indicate DC rail voltage, MCB for input ON/OFF, over current.
SPECIFICATIONS
Input : 230V AC, 50Hz. Output : Armature circuit[0-200V] DC (variable), 5Amp (suitable 1HP motor)Field circuit, [ 90-220V] DC, 1Amp

5. SPEED CONTROL OF DC SHUNT MOTOR USING IGBT USING FOUR QUADRANT CHOPPER (SINGLE PHASE INPUT) PEC16HV3. [TOC]

This trainer is designed to study the working principle and demonstrate various section of a IGBT 4 Quadrant Chopper Drive. This trainer is provided with Hall Effect Current Transducers at required lines for protection and used for measuring the current.
The front panel mimic diagram shows various section of the trainer like Power circuitry, Protection, Input circuitry etc. Various Test points provided at the front panel allows the students to study various signals of the circuitry of the trainer.
FEATURE
4 Quadrant Chopper for Armature for bi-directional drive for Separately exiting DC motor of 1hp-3hp Separate variable field system is IGBT chopper Hall Effect Current Transducer for measuring Armature, Field Currents & DC-link Bus Regenerative Breaking provided
POWER CIRCUIT:
Uncontrolled Bridge rectifier Rated for 600V @ 35Amps for converting AC input to DC link voltage DC link capacitors provided 4 Nos of IGBT for Armature voltage and to form a 4 quadrant Drive One IGBT for Field voltage Rating of 600Volt @ 8 Amp Snubber circuit is provided to each device. High speed Optos are provided to isolate gate control circuitry IGBT IC drivers are used to drive switches. One MCB provided to switch on the AC input to the Power circuit One DC Voltmeter provided to measure the DC link voltage One hall-effect current transducer provided in the DC link bus for measure the current of DC link bus and used for protection. The DC output of IGBT bridge is terminated at banana sockets and used as Armature voltage for the DC motor. One Hall-effect current transducer provided in the Armature line of the Motor to measure the Armature current and used for protection. One Hall-effect current transducer provided in the Field line of Motor to measure the Field current and used for protection. Test points provided on the Front panel (DC-link Current, Voltage, Armature current, Field current). Output voltage : #Armature Voltage : -220 to +220V DC #Armature Current : 7.5Amp #Field Voltage : 170 to 220 Volt DC #Field Current : 2 Amp Input Voltage : 230V ±10% AC, Single Phase
PROTECTIONS
The protection circuit monitors i)Field current ii)Armature current iii)DC-link voltage & iv)DC-link current and take appreciate protection like field supply failure, Over Voltage, Over Armature Current protection etc., #One Test point for Shut Down #One LED to indicate Shut Down One Reset switch is provided to restart the operation. One Control & Power circuit for Regenerative Breaking.
INPUT CIRCUITRY :
One potentiometer to vary the field voltage One Potentiometer provided to vary the armature voltage One SPDT switch provided to ON/OFF armature power Test points are provided for i) Carrier frequency ii) Armature control voltage iii) One pair of Armature PWM pulses iv) Field control PWM pulse One Rocker switch provided to power the equipments.
MOTOR SETUP
1 hp DC shunt Motor with loading arrangement #fixed on a mechanical frame #spring balance loading with dial indication #One optical encoder is provided for the speed measurement.

6. SPEED CONTROL OF DC SHUNT MOTOR USING IGBT USING FOUR QUADRANT CHOPPER (THREE PHASE INPUT) PEC16HV7 [TOC]

This trainer is designed to study the working principle and demonstrate various section of a 3 Phase Input IGBT 4 Quadrant Chopper Drive. This trainer is provided with Hall Effect Current Transducers at re-quired lines for protection and used for measuring the current.
The front panel mimic diagram shows various section of the trainer like Power circuitry, Protection, Input circuitry etc. Various Test points provided at the front panel allows the students to study various signals of the circuitry of the trainer.
FEATURE
4 Quadrant Chopper for Armature for bidirectional drive for Separately exiting DC motor of 1hp-3hp Separate variable field system is IGBT chopper Hall Effect Current Transducer for measuring Armature, Field Currents & DC-link Bus Regenerative Breaking provided
POWER CIRCUIT:
Uncontrolled Bridge rectifier Rated for 1200V @ 25Amps for converting AC input to DC link voltage DC link capacitors provided One Intelligent power module, consisting of 6 IGBTs of 1200 volt/25Amps provided
IPM provides one 12A IGBT for Breaking 4 Nos of IGBTs of IPM are provided to form 4 Quadrant Armature Drive and 2 for Field drive. Snubber circuit is provided for each device. High speed Optos are provided to isolate gate control circuitry IGBT IC drivers are used to drive switches. One MCB provided to switch on the AC input to the Power circuit One DC Voltmeter provided to measure the DC link voltage One hall-effect current transducer provided in the DC link bus for measure the current of DC link bus and used for protection. The DC output of IGBT bridge is terminated at banana sockets and used as Armature voltage for the DC motor. One Hall-effect current transducer provided in the Armature line of the Motor to measure the Armature current and used for protection. One Hall-effect current transducer provided in the Field line of Motor to measure the Field current and used for protection. Test points provided on the Front panel (DC-link Current, Voltage, Armature current, Field current). Output voltage : # Armature Voltage : -220 to +220V DC # Armature Current : 5Amp # Field Voltage : 170 to 220 Volt DC # Field Current : 2 Amp Input Voltage : 415V ±10% AC, Three Phase
PROTECTIONS
The protection circuit monitors i) Field current ii) Armature current iii) DC-link voltage & iv) DC-link current and take appreciate protection like field supply failure, Over Voltage, Over Armature Current protection etc., #One LED to indicate Shut Down One Reset switch is provided to restart the operation. One Control & Power circuit for Regenerative Breaking.
INPUT CIRCUITRY
One potentiometer to vary the field voltage One Potentiometer provided to vary the armature voltage One SPDT switch provided to ON/OFF armature power Test points are provided for i) Carrier frequency ii) Armature control voltage iii) One pair of Armature PWM pulses iv) Field control PWM pulse One Rocker switch provided to power the equipments.
MOTOR SETUP
3 hp DC shunt Motor with loading arrangement #fixed on a mechanical frame #spring balance loading with dial indication #One optical encoder is provided for the speed measurement.

7. SPEED CONTROL OF SLIP RING INDUCTION MOTOR USING IGBT CHOPPER (PEC14HV10-A). [TOC]

This module consists of three blocks, 1. Motor mounted on a mechanical frame 2. Three phase converter-inverter 3. Inverter firing control circuitry
MAIN FEATURES
Rotor voltage is controlled to vary the motor speed One transformer to feedback the recovered power to the line Efficiency is improved by returning power into AC system bus
Wound rotor Induction motor mounted on a mechanical frame (3hp, 3φ, 1410 rpm slip ring induction motor) Optical encoder with speed motor (Optional). One DC Generator coupled with motor to load the motor (Optional) Entire control circuit mounted inside a compact box Mimic circuit is drawn in the front panel Many test points are provided along with front panel A Nice text-lab manual is provided

8. DC POSITION CONTROL SYSTEM. (PEC-01) [TOC]

This trainer system is a compact & advanced version for class room experiment set up for the students to operate and study a practical position control system. A variety of Experiments can be conducted using this Trainer system. The DC motor position control trainer consists of, 1.Controller 2.Converter 3.Mechanical Setup
CONTROLLER :
2 Analog PI controller provided for speed control & position control (One Optional) Each PI controller provided with Front panel variable setting for, a. Variable gain for Proportional controller (P) b. Variable Integral Time for Integral controller (I)
CONVERTER :
4 Quadrant MOSFET chopper provided for forward & reverse direction MOSFET driver provided
MECHANICAL SETUP :
One PMDC 12 volt with Gear provided Motor speed 1500 rpm Gear ratio 30 : 1 to run 50rmp speed One Servo potentiometer provided at the low speed shaft Optionally one PMDC Motor can be coupled to the motor as load
OTHER FEATURES :
One Tachogenerator is provided for speed feedback. One 3½ digit display can be used to display the actual & reference position (3 digit)

9. DSP BASED DC MOTOR POSITION CONTROL (VPET - 107) [TOC]

This trainer system is a compact & advanced version for class room experiment set up for the students to operate and study a practical position control system. A variety of Experiments can be conducted using this Trainer system.
The DC motor position control trainer consists of 1. DSP based Controller 2. Converter 3. Motor Setup
DSP BASED CONTROLLER :
One powerful DSP controller with software 16x2 Alphanumeric display provided to display the speed, position and velocity 6x2 matrix keyboard provided to feed the input
CONVERTER :
4 Quadrant MOSFET Chopper circuit to drive the motor Dual MOSFET driver with 4 MOSFET and bridge rectifier with filtering circuit also provided
MOTOR SETUP :
12V/1.5A PMDC Motor with gear 30:1 ratio Quadrature optical encoder of 512 ppr in the without gear side. One opto coupler provided for zero sensing This setup fixed in a metal base plate
OTHER FEATURES :
Built-in Power supply Cables provided to link the mechanical setup and controller unit.
EXPERIMENTS :
Speed control of DC Servo motor Position control of DC servo motor Measure the velocity.

10. AMPLIDYNE CHARACTERISTICS TRAINER [TOC]


11. SPEED CONTROL AND ELECTRONICS BRAKING OF DC SHUNT MOTOR. [VEDT-01] [TOC]

This trainer is designed to study speed control (Forward/Reverse) and various types of Electrical braking of DC shunt motor (1hp).
Armature and Field control of DC Shunt Motor
a). DC Shunt Motor :
1 HP Armature voltage : 180V Field Voltage : 220V Shunt type 1500 RPM Speed display facility
b). MOSFET Controller
b. i. Armature control circuit :
MOSFET Based chopper circuit to vary armature voltage 0-200V DC. IC based PWM controller circuit with opto isolator and gate drive circuit Open loop operation One potentiometer used to vary the Armature Voltage
b. ii. Field Control Circuit :
MOSFET Based chopper circuit to vary Field voltage 100V-220V DC IC based PWM controller circuit with opto isolator and gate drive circuit One Potentiometer used to vary O/P voltage
c. Other Features :
One no. of Push-button for braking operation One potentiometer used to set % of braking(10% - 90%) One no. of push button for Inching operation

12. ELECTRICAL BRAKING THREE PHASE INDUCTION MOTOR [VEDT-06] [TOC]

This trainer is designed to study the working principle and demonstrate various section of a Three phase IGBT Based SPWM Inverter & V/F Control. This trainer is provided with Hall Effect Current Transducers at required lines for protection and used for measuring the current.
The front panel mimic diagram shows various section of the trainer like Power circuitry, Protection, Input circuitry etc. Various Test points provided at the front panel allows the students to study various signals of the circuitry of the trainer.
FEATURES:
IGBT based sine wave Inverter Output. Input : 230V AC 3φ Output : 5 Amps per Phase Frequency : 10Hz - 50Hz Hall Effect Current Transducer provided to measure DC link voltage and AC output Various protection circuits provided Mimics circuit screen printed in the front panel. More than 8 Test points are provided Housed in a sleek box.
POWER CIRCUIT
Un controlled Bridge rectifier Rated for 600 @ 35Amps for converting AC input to DC link voltage DC link capacitors provided 6 Number of IGBTs are provided to form three half bridges. Snubber circuit is provided to each device. High speed Optos are provided to isolate gate control circuitry IGBT IC drivers are used to drive switches. Output: 0 to 220Volt AC @ 5 Amp at each phase. One MCB provided to switch on the AC input to the power circuit One DC Voltmeter provided to measure the DC link voltage One hall-effect current transducer provided in the DC link bus and used for protection. The AC output of IGBT bridges are terminated at banana sockets. Two Hall-effect current transducer provided in the Two phase output lines and used for protection. Test points provided on the Front panel (DC-link Current, DC-link Voltage, 3 Phase output currents.)
PROTECTIONS
The protection circuit monitors i) DC-link voltage ii) DC-link current iii) 2 Phase output currents and takes appropriate protection like Over Voltage, Under Voltage and Over Load # One LED to indicate the Shut Down condition due to protection One Reset switch is provided to restart the operation. One Control & Power circuit in DC rail for Breaking over voltage
INPUT CIRCUITRY :
One Potentiometer provided to vary the AC Output voltage One potentiometer provided to vary the frequency of the output voltage Range:10Hz-50Hz One SPDT switch provided to release gate pulses 5 Test points are provided for i) Carrier frequency ii) PWM 1,PWM 2 and PWM 3 pulses iii) DC-link current iv) load current(Optional) One Rocker switch provided to power the equipments.
V/F Controller
SUGGESTED EXPERIMENTS :
Separate circuits provided to V/F control One Potentiometer provided to vary the V/F Ratio.
OTHER FEATURES :
One no. of push button for DC current braking One potentiometer used to set different % of DC braking (10% - 50%)
POWER SUPPLY
Input 230V ±10%, 50Hz, Single phase AC
ACCESSORIES :
1.1 hp three phase AC induction motor mechanical loading (PEC14HVACC13) Make : Siemens. Fixed on a mechanical frame One optical encoder is provided for the speed measurement. The output of optical encoder is signal conditioned & calibrated to indicate the speed of the DC motor & display on a 3½ digit display.

E .DC-DC CONVERTER /SMPS TRAINER [TOC]

1. Single & Multiple Output SMPS Trainer (VSMPS - 02)
2. Buck Boost Chopper (VPET -350)
3. Push Pull Inverter (PEC16M11)
4. Resonant Converter Trainer (VPET - 315)
5. Fly Back Converter (VPET - 316)
6. Boost Chopper (PEC16M10)
7. Forward, Flyback, Buck, Boost & Buck-Boost Converter Trainer ( VPET-317)
8. UPS Trainer (PEC16HV4)
9. Computer SMPS Trainer

1. SINGLE & MULTIPLE OUTPUT SMPS TRAINER (VSMPS - 02) [TOC]

This set up consists of three separate modules,1. Input power module 2. SMPS controller 3. Electronic load.
INPUT POWER MODULE
230V / 24V, 3Amp step down transformer Used to give isolated 24V AC for SMPS input. One no. auto transformer used to vary the 24V AC [0-24V]AC. One no. analog voltmeter indicate the AC output voltage [0-30V]AC.
Fuse & LED provided. Used for line regulation. SMPS CONTROLLER : IRF250 MOSFET based forward converter. TL 494 Used for PWM generation. PWM frequency at 63KHz (APP). 6N137 Opto used for pulse isolation. One potentiometer used to vary the frequency of PWM (study module). One potentiometer used to vary the ref-voltage of controller (S.M). Provision to select single / multi output. Output filtered by LC filter. Varies fault analysis switches.
ELECTRONIC LOAD
Transistor based (single quadrant chopper circuit.) load instead of resistive load. Separate circuits for PWM generation. One potentiometer used to vary the duty cycle ratio so as load current. Voltmeter / Ammeter for output voltage. Used for LOAD regulation.
SPECIFICATION
Input : [0 - 24V] AC Output : 5V, 2Amp (single output) 5V, 2Amp, +12V/ .5A, -12V/ .5A

2. BUCK BOOST CHOPPER (VPET -350) [TOC]

It consists of two sections a). DC chopper control circuit with variable duty cycle ratio b). MOSFET Based chopper power circuit IC Based PWM generator One no. of Potentiometer used to vary duty cycle of PWM signal (10% - 75%) Necessary test points provided to study the control circuit
One no. of IRF 840 MOSFET used as a power switch 5V/10V DC unregulated power supply for power circuit input One no. of fixed R Load provided One no. of inductor and power diode for power circuit One ON/OFF switch provided for power circuit input voltage. By adjusting duty cycle output voltage can be varied One no. of Analog DC Voltmeter Output Voltage < Input (Boost Mode) Output Voltage > Input (Buck Mode) All are mounted on a wooden box Input 230V, ±15V DC for power circuit

3. PUSH PULL INVERTER (PEC16M11) [TOC]

Two nos. of IRF840 MOSFET used as a power device High frequency transformer used to isolate the output signals TL494 used to generate PWM for MOSFET Two nos. of Potentiometer used to vary duty cycle ratio, frequency of PWM 24V DC Input, 12V DC Output, 1 Amp Necessary test points.

4. RESONANT CONVERTER TRAINER (VPET - 315) [TOC]

Series loaded series resonant converter with zero-current switching MOSFET used as a Power device 24V DC input for power circuit.

5. FLY BACK CONVERTER (VPET - 316) [TOC]

One no. of MOSFET used as power switch TL494 PWM controller used for MOSFET PWM generation. One no. of potentiometer used for output voltage adjustment.
One no. of Diode bridge converter and filter capacitor for converting input AC to filtered DC for MOSFET power circuit input One no. of ferrite core Transformer provided for Isolation (Input : 25V O/P, 15VDC 1Amp, 50Hz) Capacitor provided for output filtering. One no. of opto IC provided for PWM isolation One no.of IR2110 Driver IC used for MOSFET gate driving. Output voltage feedback circuit provided for closed loop operation

6. BOOST CHOPPER (PEC16M10) [TOC]

Consists of MOSFET power circuit and firing circuit. TL494 PWM controller IC used for PWM generation. One potentiometer used to vary the frequency of PWM. (2.5 - 5KHz) One potentiometer used to generate the duty - cycle ratio of PWM (10 - 80%). 67137 high speed opto used for PWM isolation. IR2110 / 2112 driver IC used for gate pulse drive. IRF840 MOSFET, L, C forms boost chopper power circuit. 15V DC / 1Amp provided for power circuit input. One no. toggle switch used for ON/OFF +15V DC. Fuse provided at load side to avoid over current. One no. analog voltmeter used to indicate input side DC volt and output boost voltage. One no. toggle switch to select the voltmeter input voltage. 230V, 50Hz AC input, +15V DC for control circuit. Necessary test points to study the control circuits. One no. illuminated rocker switch for ON/OFF mains 230V AC.
EXPERIMENTS
1. Study of boost chopper performance with frequency and duty cycle ratio variation.

7. FORWARD, FLYBACK, BUCK, BOOST & BUCK-BOOST CONVERTER TRAINER ( VPET-317)[TOC]

Buck converter. Boost converter. Buck Boost converter. Forward converter. Fly Back converter.
1.MOSFET BASED BUCK CONVERTER.
One number of powers MOSFET IRF840 used as power switch with suitable heat sink. TL494 IC based PWM generator. One number of high speed Opto isolator provided for PWM isolation. Driver IC IR2110 used to drive power switch. High frequency transformer provided for isolation. Power circuit I/P voltage : +15V DC. Output voltage 0 - 5 VDC/1 amp. 230V AC input ,+15 DC for control circuit. One number of fuse provided for protection. Voltage feed back from the output for closed loop operation. One no. of Potentiometer used for PWM variation L & C provided for filters.
2. MOSFET BASED BOOST CONVERTER.
One number of powers MOSFET IRF840 used as power switch with suitable heat sink. TL494 IC based PWM generator. One number of high speed Opto isolator provided for PWM isolation. Driver IC IR2110 used to drive power switch. High frequency transformer provided for isolation. Power circuit I/P voltage +15V DC. Output voltage 0 - 25 VDC/1 amp. One number of fuse provided for protection. Voltage feed back from the output for closed loop operation. L & C Provided for filtering
3. MOSFET BASED BUCK BOOST CONVERTER
It consists of two sections A) DC chopper control Circuit with variable duty cycle ratio b). MOSFET based chopper power circuit IC based PWM Generator One no. of Potentiometer used to vary duty cycle of PWM signal (10% - 75%) Necessary test points provided to study the control circuit One no. of IRF 840 MOSFET used as a power switch 5V/10V DC unregulated power supply for power circuit One ON/OFF switch provided for power circuit input voltage By adjusting duty cycle output voltage can be varied One no. of analog DC voltmeter Output Voltage < input (Boost mode) Output Voltage > Input (Buck Mode) All are mounted on a wooden box Input 230V, 115V DC for power circuit
4. MOSFET BASED FORWARD CONVERTER.
One number of powers MOSFET IRF840 used as power switch with suitable heat sink. TL494 IC based PWM generator. One number of high speed Opto isolator provided for PWM Isolation. Driver IC IR2110 used to drive power switch. High frequency transformer provided for isolation. Power circuit I/P voltage +15V DC. Output voltage 0 - 5 VDC/1 amp. 230V AC input ,+15 DC for control circuit. One number of fuse provided for protection. Voltage feed back from the output for closed loop operation.
5. MOSFET BASED FLY BACK CONVERTER.
One number of powers MOSFET IRF840 used as power switch with Suitable heat sink. TL494 IC based PWM generator. One number of high speed Opto isolator provided for PWM isolation. Driver IC IR2110 used to drive power switch. High frequency transformer provided for isolation. Power circuit I/P voltage +15V DC. Output voltage 0 - 5 VDC/1 amp. 230V AC input ,+15 DC for control circuit. One number of fuse provided for protection. Voltage feed back from the output for closed loop operation.
All components are mounted on a nice cabinet with necessary test points & terminals. One no. of Rheostat provided for load. Necessary ammeters & voltmeters provided.

8. UPS TRAINER (PEC16HV4) [TOC]

This set up consists of 24V battery module, battery charger, UPS controller module.
BATTERY
2No. 12V, 60AH Battery connected in series, with fuse protection.
BATTERY CHARGER
SCR Based battery charger. Current set potentiometer for setting charging current. LED indication for over / triggle charge 230V AC input.
UPS CONTROLLER
MOSFET Based push-pull inverter. SG3525 used for PWM generation. Three no. potentiometer used to vary frequency, duty cycle, dead time. Separate cycle for battery level monitoring with low / highvolt LED indication. Provision to select online / offline UPS. More than 10 no toggle switch for fault analysis.
SPECIFICATIONS
Capacity : 500V A Input voltage : 24V DC Output voltage : [150 - 230V] AC (variable voltage) [45-55Hz] (variable frequency) Output rating : 2.5A

9. COMPUTER SMPS TRAINER [TOC]


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