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AL-E957A HIGH VOLTAGE POWER ELECTRONICS TEST BENCH

AL-E957A HIGH VOLTAGE POWER ELECTRONICS TEST BENCH

Project Information

  • Category: WORKBENCHES
  • Sub Category: WORKBENCHES
  • Model Number: AL-E957A

Description

AL-E957A HIGH VOLTAGE POWER ELECTRONICS TEST BENCH

1. MODEL NUMBER: AL-E657A

AL-E957A HIGH VOLTAGE POWER ELECTRONICS TEST BENCH

Detailed Technical Specification

2. Product Description

The AL-E957A High Voltage Power Electronics Test Bench is a comprehensive laboratory training and testing system designed for practical study of power semiconductor devices, rectifiers, controlled converters, AC voltage controllers, choppers, inverters, PWM techniques, cycloconverters and single/three-phase motor loads.

The system incorporates isolated measurement facilities, configurable power semiconductor modules, firing circuits, AC/DC supplies, multiple motor loads, lamp loads, safety protection and modular patch-cord-based interconnections.

3. Scope of Learning

The trainer shall support practical study of:

1.                Single-phase AC supply and single-phase low-voltage 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.

11.             Ramp and comparator firing circuit.

12.             Half-wave controlled rectifier.

13.             Half-wave controlled rectifier with freewheeling diode.

14.             Full-wave controlled rectifier.

15.             Full-wave controlled rectifier with freewheeling diode.

16.             Bridge controlled rectifier.

17.             Bridge controlled rectifier with freewheeling diode.

18.             Semiconverter in common-cathode configuration.

19.             Bridge inverter.

20.             Step-up chopper.

21.             Step-down chopper.

22.             Chopper firing circuit.

23.             Inverter firing circuit.

24.             Cycloconverter and its firing circuit.

25.             PWM generation and control.

26.             Three-phase AC supply.

27.             Three-phase low-voltage supply.

28.             AC voltage control.

29.             Heater-load rectification/control.

30.             Practical study of different motor-load characteristics.

4. Power Supply Section

4.1 Single-Phase AC Supply

  • Voltage: 110–220V AC
  • Frequency: 50/60Hz
  • On-board supply provision.
  • Protected through MCB.

4.2 Center-Tapped Transformer

·                  Output: 115V–0–115V

·                  Tolerance: ±10%

·                  Current: 2A

4.3 Low-Voltage AC Supply

·                  18V–0–18V

·                  15V–0V

4.4 Low-Voltage DC Supply

The trainer shall provide:

·                  +30V DC / 250mA

·                  +15V DC / 250mA

·                  +12V DC / 250mA

·                  +5V DC / 250mA

4.5 Three-Phase AC Supply

·                  Phase voltage: 230V

·                  Line voltage: 415V

·                  Frequency: 50Hz

·                  Tolerance: ±10%

4.6 Three-Phase Low-Voltage Supply

·                  24V each phase

·                  Frequency: 50Hz

·                  Tolerance: ±10%

5. Power Semiconductor Section

Diode Assembly

·                  Power diode assembly: 25A

·                  Suitable for uncontrolled rectifier experiments.

·                  Configurable through safety sockets.

SCR Assembly

·                  Voltage rating: 1200V

·                  Current rating: 25A

·                  Suitable for controlled rectifier and AC-controller experiments.

IGBT Assembly

  • Device: G4BC20S
  • Voltage rating: 600V
  • Current rating: 10A
  • Suitable for chopper and inverter experiments.

Protection

  • Internal RC snubber circuit.
  • Short-circuit protection.
  • Pulse isolation.
  • Replaceable power modules.

6. Firing & Control Circuits

Single-Phase Firing Circuit

·                  Ramp and comparator principle.

·                  Firing-angle range: 30°–180°.

·                  Synchronization section.

·                  Pulse amplifier.

·                  Isolation section.

·                  Test points provided.

Three-Phase Firing Circuit

·                  Three-phase synchronized firing system.

·                  Firing-angle range: 30°–150°.

·                  Individual test points for waveform analysis.

·                  Pulse amplification and isolation.

Cycloconverter Firing Circuit

  • Dedicated firing circuit.
  • Firing-angle range: 30°–180°.
  • Suitable for cycloconverter studies.

PWM Circuit for Chopper

  • Triangular comparator method.
  • Frequency: approximately 270Hz–5kHz.
  • Duty-cycle/PWM adjustment.
  • PWM variation: 0–90% and 0–50%.

PWM Circuit for Inverter

  • Dedicated PWM generation facility.
  • Suitable for IGBT-based inverter switching studies.

Chopper Firing Circuit

  • Suitable for step-up and step-down chopper experiments.
  • Pulse generation and control through PWM technique.

3Phase Inverter Firing Circuit

  • Dedicated switching pulse generation.
  • Suitable for bridge inverter experiments.

7. Measurement System

Digital AC Voltmeter

·                  Range: 0–700V AC

·                  Digital indication.

·                  Suitable for input and output AC measurements.

Digital AC Ammeter

  • Range: 0–30A AC

Digital DC Voltmeter

  • Range: 0–500V DC

Digital DC Ammeter

  • Range: 0–30A DC

Power Scope

  • Power-scope functionality.
  • Isolated measurement facility up to 1500V.
  • Suitable for observing:

ü  AC/DC waveforms

ü  Gate pulses

ü  SCR firing pulses

ü  IGBT switching pulses

ü  PWM waveforms

ü  Rectifier output

ü  Chopper output

ü  Inverter output

ü  Cycloconverter waveforms

8. Motor Load Section

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.

9. Lamp Load Assembly

The workbench shall incorporate:

·                  Four × 200W lamp loads

·                  Individual connection points.

·                  Suitable for:

ü  Half-wave rectifier studies

ü  Full-wave rectifier studies

ü  Bridge rectifier studies

ü  AC voltage-controller experiments

ü  Semiconverter experiments

ü  Cycloconverter experiments

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.

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.

10. Safety Features

The AL-E957A shall include:

·                  Single-phase 10A MCB.

·                  Three-phase 10A MCB.

·                  2-pole and 4-pole MCB protection.

·                  Short-circuit protection.

·                  Front-panel supply isolation.

·                  Three-phase R-Y-B indication.

·                  Rear three-phase input socket.

·                  Internal RC snubber protection.

·                  Pulse isolation.

·                  Safety sockets.

·                  Insulated front panel.

·                  Proper earthing provision.

·                  Rear exhaust cooling fan.

·                  Lockable castor wheels.

11. Construction

·                  Heavy-duty metal cabinet construction.

·                  High-quality insulated printed Bakelite/aluminium front panel.

·                  Clearly printed circuit diagrams and symbols.

·                  Colour-coded 4mm safety sockets.

·                  2mm and 4mm connection facilities.

·                  Modular power and firing circuits.

·                  Easily replaceable power and firing modules.

·                  Four 200W lamp loads.

·                  Provision for multiple motor loads.

·                  Rear-mounted cooling fan.

·                  Locking castor wheels.

·                  Workbench-type construction with storage drawers.

·                  Approximate size: 30" × 20".

12. Salient Features

·                  Complete high-voltage power electronics training platform.

·                  Single- and three-phase supply sections.

·                  Low-voltage AC/DC supplies.

·                  High-current diode assembly.

·                  High-voltage/high-current SCR assembly.

·                  IGBT power switching section.

·                  Single-phase firing control.

·                  Three-phase firing control.

·                  Dedicated chopper PWM.

·                  Dedicated inverter PWM.

·                  Cycloconverter firing circuit.

·                  Pulse amplifier and isolation section.

·                  Integrated digital AC/DC meters.

·                  Integrated digital oscilloscope/power scope.

·                  Up to 1500V isolated measurement facility.

·                  Multiple motor loads.

·                  Four 200W lamp loads.

·                  Extensive test-point facility.

·                  2mm and 4mm safety socket interconnection.

·                  Replaceable power/firing modules.

·                  RC snubber protection.

·                  Short-circuit protection.

·                  Rear cooling fan.

·                  Mobile workstation with locking wheels.

·                  Instruction manual supplied.

13. Detailed List of Experiments

Rectifier Experiments

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

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.

Semiconverter Experiments

  1. Common-cathode semiconverter 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.

AC Controller & Cycloconverter

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

Chopper & Inverter

  1. Study of PWM circuit.
  2. Study of chopper firing circuit.
  3. Step-down chopper.
  4. Step-up chopper.
  5. Study of inverter firing circuit.
  6. Bridge inverter.
  7. Study of IGBT switching.
  8. PWM control of chopper.
  9. PWM control of inverter.

Three-Phase & Additional Experiments

  1. Study of three-phase supply.
  2. Study of three-phase low-voltage supply.
  3. Half-wave uncontrolled rectifier, common-cathode configuration.
  4. Half-wave uncontrolled rectifier, common-cathode configuration with freewheeling diode.
  5. Half-wave uncontrolled rectifier, common-anode configuration.
  6. Half-wave uncontrolled rectifier, common-anode configuration with freewheeling diode.
  7. Bridge rectifier on heater load.
  8. Half-wave controlled rectifier, common-cathode configuration.
  9. Half-wave controlled rectifier, common-cathode configuration with freewheeling diode.
  10. Semiconverter on heater load.
  11. Half-wave AC voltage controller.
  12. Full-wave AC voltage controller.

14. Standard Supply

The complete AL-E957A High Voltage Power Electronics Test Bench shall be supplied with the integrated trainer, power supply sections, diode/SCR/IGBT assemblies, firing circuits, PWM circuits, cycloconverter circuit, measurement instruments, load assemblies, motor interfaces, safety interconnections, patch cords, cooling system, protection system and instruction manual.

Optional Accessories:

ü  OScilloscope

Technical Details