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AL-E957 POWER ELECTRONICS WORKBENCH

AL-E957 POWER ELECTRONICS WORKBENCH

Project Information

  • Category: WORKBENCHES
  • Sub Category: WORKBENCHES
  • Model Number: AL-E957

Description

AL-E957 POWER ELECTRONICS WORKBENCH

AL-E957 POWER ELECTRONICS WORKBENCH

Detailed Technical Specification & Laboratory Training System

1. Scope of Learning

The AL-E957 Power Electronics Workbench is a comprehensive laboratory training system designed for practical study of power semiconductor devices, uncontrolled and controlled rectifiers, AC voltage controllers, choppers, inverters, PWM techniques and cycloconverters.

The workbench shall facilitate the following studies:

1.             Supply and single-phase low-voltage power supply.

2.             Half-wave uncontrolled rectifier with lamp and motor load.

3.             Half-wave uncontrolled rectifier with freewheeling diode on motor load.

4.             Full-wave uncontrolled rectifier with lamp and motor load.

5.             Full-wave uncontrolled rectifier with freewheeling diode on motor load.

6.             Bridge uncontrolled rectifier with lamp and motor load.

7.             Bridge uncontrolled rectifier with freewheeling diode on motor load.

8.             Ramp and comparator firing circuit.

9.             Half-wave controlled rectifier with lamp and motor load.

10.          Half-wave controlled rectifier with freewheeling diode.

11.          Full-wave controlled rectifier with lamp and motor load.

12.          Full-wave controlled rectifier with freewheeling diode.

13.          Bridge controlled rectifier with lamp and motor load.

14.          Bridge controlled rectifier with freewheeling diode.

15.          Semiconverter in common-cathode configuration.

16.          Bridge inverter.

17.          Step-up chopper.

18.          Step-down chopper.

19.          AC voltage control.

20.          PWM generation and control.

21.          Cycloconverter operation and firing control.

22.          Three-phase supply and three-phase low-voltage supply studies.

2. Main Technical Specifications

Parameter

Specification

Product

Power Electronics Workbench

Model No.

AL-E957

Single-Phase Power Switch

10A MCB

Three-Phase Power Switch

10A MCB

Interconnections

2 mm & 4 mm safety sockets

Diode Assembly

6A10, 1000V / 6A

SCR Assembly

TYN616, 600V / 16A

IGBT Assembly

G4BC20S, 600V / 10A

Single-Phase Firing Circuit

Ramp Comparator type

Single-Phase Firing Angle

Approx. 30°–180°

Three-Phase Firing Circuit

Three-phase firing circuit

Three-Phase Firing Angle

Approx. 30°–150°

Cycloconverter Firing Circuit

Dedicated firing circuit

Cycloconverter Firing Angle

Approx. 30°–180°

PWM Method

Triangular comparator method

PWM Frequency

Approx. 270 Hz–5 kHz

PWM Variation

0–90% and 0–50%

Oscilloscope

30 MHz, isolated power-scope measurement up to 1500V

Digital AC Voltmeter

0–500V AC

Digital AC Ammeter

0–30A AC

Digital DC Voltmeter

0–500V DC

Digital DC Ammeter

0–30A DC

Load Assembly

Four load assemblies

Motor Load

Universal motor, 1/8 HP

Lamp Load

Four × 200W bulbs

Protection

Short-circuit protection

Cooling

Rear exhaust fan

Mobility

Lockable castor wheels

3. Power Supply Section

Single-Phase AC Power Supply

  • Input: 110–220V AC
  • Frequency: 50/60 Hz
  • On-board provision with protective MCB.

Center-Tapped Transformer

  • Output: 115V–0–115V ±10%
  • Current: 2A

Low-Voltage AC Supply

  • 18V–0–18V
  • 15V–0V

Low-Voltage DC Supply

  • +30V DC
  • +15V DC
  • +12V DC
  • +5V DC
  • Current capacity: 250mA

Three-Phase AC Supply

  • Phase voltage: 230V
  • Line voltage: 415V
  • Tolerance: ±10%
  • Frequency: 50Hz

Three-Phase Low-Voltage Supply

  • 15V each phase
  • Tolerance: ±10%
  • Frequency: 50Hz

Main Supply

  • 415V AC
  • 50Hz
  • Permissible variation: +10%

4. Power Semiconductor Assembly

6Nos Diode Assembly

The workbench shall include an easily accessible diode power circuit using:

  • Device: 6A10
  • Voltage rating: 1000V
  • Current rating: 6A

6Nos SCR Assembly

The SCR section shall provide controlled rectification experiments using:

  • Device: TYN616
  • Voltage rating: 600V
  • Current rating: 16A

6Nos. IGBT Assembly

The IGBT power circuit shall use:

  • Device: G4BC20S
  • Voltage rating: 600V
  • Current rating: 10A

The power semiconductor modules shall be easily replaceable for maintenance and laboratory servicing.

5. Firing Circuit Section

Single-Phase Firing Circuit

·                  Ramp and comparator firing principle.

·                  Firing angle control: approximately 30°–180°.

·                  Test points available for monitoring different stages.

·                  Pulse amplifier and isolation section incorporated.

·                  Suitable for controlled rectifier experiments.

Three-Phase Firing Circuit

·                  Dedicated three-phase synchronized firing circuit.

·                  Firing angle adjustment: approximately 30°–150°.

·                  Test points provided for waveform observation.

·                  Pulse amplification and isolation incorporated.

Cycloconverter Firing Circuit

·                  Dedicated cycloconverter firing circuit.

·                  Firing-angle control: approximately 30°–180°.

·                  Suitable for studying frequency conversion and cycloconverter operation.

PWM Firing Circuit (Inverter)

·                  Triangular carrier/comparator method.

·                  Frequency range: approximately 270Hz to 5kHz.

·                  PWM variation: 0–90% and 0–50%.

PWM Firing Circuit (Chopper)

·                  Triangular carrier/comparator method.

·                  Frequency range: approximately 270Hz to 5kHz.

·                  PWM variation: 0–90% and 0–50%.

6. Measurement Section

Digital AC Voltmeter

·                  Measurement range: 0–500V AC

·                  Digital display.

·                  Suitable for monitoring input/output AC voltage.

Digital AC Ammeter

·                  Measurement range: 0–30A AC

·                  Digital display.

Digital DC Voltmeter

·                  Measurement range: 0–500V DC

·                  Digital display.

Digital DC Ammeter

·                  Measurement range: 0–30A DC

·                  Digital display.

Power Scope

·                  Isolated measurement facility.

·                  Measurement capability up to 1500V.

·                  Suitable for observing voltage, current and firing waveforms.

CRO Observations

·                  1/10 Cro Observations

·                  Suitable for observing voltage, current and firing waveforms.

7. Load Assembly

The workbench shall incorporate multiple load arrangements for practical experiments.

Lamp Load

·                  4 × 200W bulbs

·                  Suitable for resistive-load rectifier and AC-controller experiments.

Motor Load

·                  Single Phase Motor

·                  Rating: 1/4HP

·                  Single Phase  AC-controller experiments.

Motor Load

·                  Three Phase Motor

·                  Rating: 1/4HP

·                  Three Phase AC-controller experiments.

Motor Load

·                  PMDC Motor

·                  Rating:24V,4A

·                  Suitable for half-wave/full-wave controlled and uncontrolled rectification, freewheeling-diode and AC-controller experiments.

Inductive Load

·                  80mH,2A  (For 3Phase)

·                  20mH,2A (For 1Phase)

·                  Suitable for half-wave/full-wave controlled and uncontrolled rectification, freewheeling-diode and AC-controller experiments.

Additional Load

Provision shall be available for heater/load-based experiments as listed in the laboratory experiments.

8. Safety & Protection Features

The workbench shall incorporate:

·                  Single-phase MCB.

·                  Three-phase MCB.

·                  4-pole and 2-pole MCB protection as applicable.

·                  Short-circuit protection.

·                  Front-panel power isolation.

·                  Safety sockets for electrical interconnections.

·                  Pulse isolation in firing circuits.

·                  Internal RC snubber circuit in the power circuit module.

·                  Three-phase supply indication through Red, Yellow and Blue indicators.

·                  Rear exhaust fan for thermal management.

·                  Properly insulated front panel.

·                  Lockable castor wheels for safe movement.

9. Construction & Mechanical Details

  • Heavy-duty metal cabinet construction.
  • Front panel made from high-quality insulated Printed Circuit Board sheet.
  • Clearly printed circuit diagrams, symbols and connection points.
  • Connections brought out through colour-coded safety sockets.
  • 2mm and 4mm connection sockets provided.
  • 4mm patch cords supplied.
  • Modular firing and power circuit sections.
  • Easily replaceable circuit modules.
  • One extension board provided on the workbench.
  • Rear panel equipped with three-phase input socket.
  • Exhaust fan mounted at the rear.
  • Locking castor wheels provided.
  • Approximate overall trainer size: 30" × 20".

10. Salient Features

  • On-board single-phase mains supply.
  • On-board single-phase low-voltage supply.
  • On-board three-phase mains supply.
  • On-board three-phase low-voltage supply.
  • Dedicated MCB protection for three-phase input.
  • Front-panel MCBs for individual supply sections.
  • R-Y-B phase indication.
  • On-board oscilloscope/power-scope facility.
  • On-board AC and DC voltage/current measurement.
  • On-board lamp and motor loads.
  • On-board single-phase firing circuit.
  • On-board three-phase firing circuit.
  • On-board PWM generator.
  • On-board cycloconverter firing circuit.
  • Test points for waveform observation.
  • Pulse amplifier and isolation section.
  • Diode, SCR and IGBT power assemblies.
  • Internal RC snubber protection.
  • 2mm and 4mm safety connection system.
  • Replaceable firing and power modules.
  • Four 200W lamp loads.
  • 1/8 HP universal motor load.
  • Short-circuit protection.
  • Rear cooling fan.
  • Lockable castor wheels.
  • Comprehensive instruction manual.

11. Detailed List of Experiments

A. Power Supply & Rectifier Experiments

  1. Study of single-phase AC and low-voltage AC supply.
  2. Half-wave uncontrolled rectifier with lamp load.
  3. Half-wave uncontrolled rectifier with motor load.
  4. Half-wave uncontrolled rectifier with freewheeling diode.
  5. Full-wave uncontrolled rectifier with lamp load.
  6. Full-wave uncontrolled rectifier with motor load.
  7. Full-wave uncontrolled rectifier with freewheeling diode.
  8. Bridge uncontrolled rectifier with lamp load.
  9. Bridge uncontrolled rectifier with motor load.
  10. Bridge uncontrolled rectifier with freewheeling diode.

B. Controlled Rectifier Experiments

  1. Ramp and comparator firing circuit.
  2. Half-wave controlled rectifier with lamp load.
  3. Half-wave controlled rectifier with motor load.
  4. Half-wave controlled rectifier with freewheeling diode.
  5. Full-wave controlled rectifier with lamp load.
  6. Full-wave controlled rectifier with motor load.
  7. Full-wave controlled rectifier with freewheeling diode.
  8. Bridge controlled rectifier with lamp load.
  9. Bridge controlled rectifier with motor load.
  10. Bridge controlled rectifier with freewheeling diode.

C. Semiconverter Experiments

  1. Semiconverter common-cathode configuration with lamp load.
  2. Common-cathode semiconverter with motor load.
  3. Common-cathode semiconverter with freewheeling diode.
  4. Common-anode semiconverter with lamp load.
  5. Common-anode semiconverter with motor load.
  6. Common-anode semiconverter with freewheeling diode.
  7. Asymmetrical semiconverter with lamp load.
  8. Asymmetrical semiconverter with motor load.
  9. Asymmetrical semiconverter with freewheeling diode.
  10. Asymmetrical half-wave-control configuration with lamp load.
  11. Asymmetrical half-wave-control configuration with motor load.
  12. Asymmetrical half-wave-control configuration with freewheeling diode.

D. AC Voltage Controller & Cycloconverter

  1. AC ON/OFF control with lamp load.
  2. AC ON/OFF control with motor load.
  3. Half-wave AC voltage controller with lamp load.
  4. Half-wave AC voltage controller with motor load.
  5. Full-wave AC voltage controller with lamp load.
  6. Full-wave AC voltage controller with motor load.
  7. Study of cycloconverter with lamp load.
  8. Study of cycloconverter with motor load.
  9. Study of cycloconverter firing circuit.

E. PWM & Power Converter Experiments

  1. Study of PWM generation circuit.
  2. Study of triangular comparator PWM.
  3. Study of step-down chopper.
  4. Study of step-up chopper.
  5. Study of bridge inverter.
  6. Study of IGBT switching operation.

F. Three-Phase Experiments

  1. Study of three-phase mains supply.
  2. Study of three-phase low-voltage supply.
  3. Three-phase firing circuit and firing-angle control.

G. Additional Rectifier Configurations

  1. Half-wave uncontrolled rectifier, common-cathode configuration, lamp load.
  2. Half-wave uncontrolled rectifier, common-cathode configuration, motor load.
  3. Half-wave uncontrolled rectifier, common-cathode configuration with freewheeling diode.
  4. Half-wave uncontrolled rectifier, common-anode configuration, lamp load.
  5. Half-wave uncontrolled rectifier, common-anode configuration, motor load.
  6. Half-wave uncontrolled rectifier, common-anode configuration with freewheeling diode.
  7. Bridge rectifier with heater load.
  8. Half-wave controlled rectifier, common-cathode configuration, lamp load.
  9. Half-wave controlled rectifier, common-cathode configuration, motor load.
  10. Half-wave controlled rectifier, common-cathode configuration with freewheeling diode.
  11. Semiconverter with heater load.
  12. Half-wave AC voltage controller with lamp and motor load.
  13. Full-wave AC voltage controller with lamp and motor load.

12. Standard Supply & Accessories

The complete system shall be supplied with:

  • Power electronics workbench/trainer.
  • Single-phase supply section.
  • Three-phase supply section.
  • Low-voltage AC/DC supply sections.
  • Diode assembly.
  • SCR assembly.
  • IGBT assembly.
  • Single-phase firing circuit.
  • Three-phase firing circuit.
  • Cycloconverter firing circuit.
  • PWM circuit.
  • AC/DC digital meters.
  • Oscilloscope/power-scope section.
  • Lamp load assembly.
  • Universal motor load.
  • Safety patch cords.
  • 2mm/4mm connection leads as applicable.
  • Extension board.
  • Instruction/experiment manual.

Optional Accessories:

·        Oscilloscope

Technical Details