AL-E393F POWER ELECTRONICS TRAINER – FOR INVERTERS Series, Parallel and Bridge Inverters

Description

AL-E393F POWER ELECTRONICS TRAINER – FOR INVERTERS

Series, Parallel and Bridge Inverters

Model No.: AL-E393F

1. Product Overview

The Power Electronics Trainer for Inverters, Model AL-E393F, is a laboratory training system designed for the study, demonstration, interconnection and experimental analysis of inverter circuits. The trainer provides dedicated sections for isolated DC power supplies, transformer interfaces, RLC loads, inductors, MOSFET and SCR devices, CRO observation points and different firing/control circuits.

It is suitable for engineering and technical laboratories for practical study of series, parallel and bridge inverter configurations.

2. Main Technical Specifications

3. Isolated DC Power Supply

The trainer shall incorporate isolated DC power supply sections specifically intended for inverter experiments.

Supply-1

• Output: +24 V DC
• Current capacity: 4 A
• Isolated DC supply for inverter applications
• Separate positive and negative output terminals
• Colour-coded connection terminals

Supply-2

• Output: +12 V DC
• Current capacity: 4 A
• Isolated DC supply for inverter applications
• Separate positive and negative output terminals
• Colour-coded connection terminals

4. Transformer Section

The trainer shall provide transformer terminals for experimental study and interconnection with inverter circuits.

The panel provides clearly identified terminals corresponding to:

• 24 V winding/connection
• 0 V connection
• 12 V winding/connection
• 230 V winding/connection
• Transformer interconnection terminals
• Safety-oriented isolated connection points

5. RLC Load Panel

A dedicated RLC Load Panel shall be provided for studying inverter output characteristics with capacitive loading.

The panel shall include:

• Multiple capacitor selections
• 10 µF / 400 V capacitors
• 4 µF / 400 V capacitor
• Individual accessible terminals
• Clearly marked component values
• Suitable front-panel connection arrangement

6. Inductor Section

The trainer shall include dedicated inductive loads for inverter experiments.

Provided inductive elements:

• 16 mH – 0 – 16 mH selectable inductance section
• 50 mH inductive element
• Individual connection terminals
• Clearly printed inductance values
• Suitable terminals for experimental circuit configuration

7. MOSFET Bank

A dedicated MOSFET power-device section shall be provided.

Specification

• MOSFET Type: IRF540
• Devices: D1, D2, D3 and D4
• Gate terminals: G1, G2, G3 and G4
• Source terminals: S1, S2, S3 and S4
• Individual device connection points
• Colour-coded banana terminals
• Circuit symbols printed on the front panel

The MOSFET bank shall facilitate practical study of switching and inverter circuits.

8. SCR Section

The trainer shall incorporate an SCR section identified as SCR 2BIT.

Specification

• SCR devices: A1 and A2
• Gate terminals: G1 and G2
• Cathode terminals: K1 and K2
• Individual device terminals
• Circuit symbols provided on the panel
• Suitable for firing and inverter-related experiments

9. CRO Observation Section

A dedicated section shall be provided for observing inverter waveforms using an external CRO/oscilloscope.

Features

• Clearly marked CRO OBSERVATIONS
• Dedicated output terminals
• 1/10 marking as shown on the trainer
• Convenient front-panel access
• Suitable for observation of switching/firing/output waveforms

10. PWM Firing Circuit Frequency Control

The trainer shall include a dedicated PWM Firing Circuit Frequency Control section.

Features

• Separate FREQ. CONTROL
• Separate PWM CONTROL
• Rotary controls for adjustment
• Gate terminals:
• G1
• G2
• G3
• G4
• Corresponding terminals:
• S1
• S2
• S3
• S4
• Front-panel circuit identification

The section shall facilitate practical study of PWM-based inverter firing and switching control.

11. UJT Firing Circuit

A dedicated UJT Firing Circuit shall be provided.

Features

• Adjustable PHASE CONTROL
• G1 and K1 terminals
• G2 and K2 terminals
• Front-panel firing circuit arrangement
• Rotary phase-control adjustment
• Clearly marked terminals

The circuit shall be used for practical study of phase-controlled firing techniques.

12. Parallel Inverter Firing Circuit

The trainer shall include a separate PARALLEL INVERTER FIRING CIRCUIT section.

Terminals

• G1
• K1
• G2
• K2

The arrangement shall allow practical connection and investigation of firing signals for parallel inverter configurations.

13. Front Panel Construction

The front panel shall provide:

• Rigid laboratory-grade enclosure
• Clearly printed circuit diagrams and functional blocks
• Individual experiment sections
• Colour-coded terminals
• Component identification
• Device terminal identification
• Rotary controls
• Power ON/OFF switch
• Easily accessible test points
• Dedicated CRO observation points
• Proper separation between functional sections

14. Functional Sections Provided

The trainer shall comprise, as applicable:

1. Isolated DC Power Supply for Inverter – +24 V/4 A
2. Isolated DC Power Supply for Inverter – +12 V/4 A
3. Transformer section
4. RLC Load Panel
5. Inductor section
6. MOSFET Bank – IRF540
7. SCR 2-bit section
8. CRO Observation section
9. PWM Firing Circuit Frequency Control
10. UJT Firing Circuit
11. Parallel Inverter Firing Circuit
12. Main ON/OFF control

15. Experiments / Training Applications

The trainer is intended to facilitate practical study of:

1. Basic inverter switching principles.
2. Series inverter configuration.
3. Parallel inverter configuration.
4. Bridge inverter configuration.
5. MOSFET-based inverter circuits.
6. SCR-based inverter circuits.
7. PWM firing and control.
8. Frequency control of PWM firing circuits.
9. UJT firing circuit operation.
10. Phase-control techniques.
11. Study of inverter switching waveforms.
12. CRO observation of firing/output signals.
13. Study of resistive/capacitive/inductive loading effects.
14. Study of transformer coupling in inverter circuits.
15. Study of inverter operation with different inductive loads.
16. Comparative study of different inverter firing arrangements.

16. Educational Features

• Modular and systematic front-panel arrangement.
• Clearly labelled components and terminals.
• Built-in power supplies for experimental use.
• Dedicated power semiconductor sections.
• Separate firing-control sections.
• Easy access to test points.
• Suitable for waveform observation using CRO/oscilloscope.
• Suitable for undergraduate and diploma-level power-electronics laboratory experiments.
• Provides practical understanding of inverter switching, firing and control techniques.

17. Scope of Supply

The complete system shall include:

Note: Exact accessories and quantities should be confirmed against the final purchase/tender schedule.

18. Salient Features

• +24 V/4 A and +12 V/4 A isolated DC supplies
• IRF540 MOSFET bank
• SCR 2-bit section
• 16 mH–0–16 mH and 50 mH inductors
• 400 V capacitor load section
• Transformer interface with clearly marked terminals
• PWM frequency and PWM control
• UJT phase-control firing circuit
• Parallel inverter firing circuit
• Dedicated CRO observation points
• Clearly printed circuit diagrams
• Colour-coded banana terminals
• Rugged laboratory trainer construction
• Suitable for practical inverter training and demonstrations

Source basis: The above specification is prepared from the supplied trainer image, including the visible AL-E393F model marking and the component/control sections shown on the panel. Where the image does not provide a numerical rating, I have not assigned an unsupported value.

Technical Details