GL-DLDZ-2A Power electronics comprehensive test bench

Ⅰ、Overview

GL-DLDZ-2A Power electronics comprehensive test bench is mainly used for courses in various majors of electromechanics and automation: experiments on motor principles and electric traction (motor and electrical control), power electronics technology (power electronics technology), electrical transmission control systems (motion control systems), etc. It can undertake the relevant experimental teaching tasks and has sufficient expansion freedom to meet the requirements of further in-depth research in the future.

Ⅱ、Product features

1. The unique structural design combining fixed modules (loads, AC and DC power supplies, and modules with heavy weight adopt fixed structures) and hanging box modules not only reduces the intensity of teacher's preparatory work before the experiment, but also provides convenience for the expansion of the experimental bench functions.

2. While completing traditional experimental projects, the experimental bench highlights the research on modern power electronic devices and modern control theory.

3. The experimental device is equipped with complete personal safety and equipment safety protection functions. The output of the AC power supply of the equipment is designed with overcurrent protection function, and a high-voltage protection circuit is provided at the end of each trigger pulse observation hole, and the power device is provided with a safety protection circuit. In order to prevent strong electric signals from being added to weak electric circuits, three types of experimental wires are used so that students will not insert the high and low voltage lines incorrectly when wiring, which will cause damage to the low voltage circuit.

4. Experimental motor: The power of the experimental motor used is between 100-200W, and it is specially designed. Its parameters and characteristics can simulate small and medium-sized motors.

III、Product technical conditions

1. Machine capacity:<1.5kVA;

2. Working power: ~3N/380V/50Hz/3A;

3. Size: 1565mm*720mm*1650mm

4. Weight Weight:<150kg

IV、Experimental Project of Power electronics comprehensive test bench

1. Single-phase half-wave controlled rectifier circuit experiment

2. Single-phase bridge half-controlled rectifier circuit experiment

3. Single-phase bridge full-controlled rectifier and active inverter circuit experiment

4. Three-phase half-wave controlled rectifier circuit experiment

5. Three-phase bridge half-controlled rectifier circuit experiment

6. Single-phase bridge full-controlled rectifier and active inverter experiment

7. Three-phase half-wave active inverter circuit experiment

8. Three-phase bridge full-controlled rectifier and active inverter experiment

9. Single-phase AC voltage regulation circuit experiment

10. Three-phase AC voltage regulation circuit experiment

11. Determination of parameters and link characteristics of thyristor DC speed regulation system

12. Debugging of main units of thyristor DC speed regulation

13. Research on static characteristics of irreversible single closed-loop DC speed regulation system

14. Dual closed-loop thyristor irreversible DC speed regulation system

15. Logic non-circulating reversible DC speed regulation system

16. DC pulse width speed regulation system (PWM) with dual closed-loop control

17. Double closed-loop three-phase asynchronous motor voltage and speed regulation system

18. Double closed-loop three-phase asynchronous motor cascade speed regulation system

19. Single junction transistor trigger circuit and single-phase half-wave controlled rectifier circuit experiment

20. Sine wave synchronous phase shift trigger circuit experiment

21. Sawtooth wave synchronous phase shift trigger circuit experiment

22. Siemens TCA785 integrated trigger circuit experiment

23. Main parameter measurement of power field effect transistor (MOSFET)

24. Research on the drive circuit of power field effect transistor (MOSFET)

25. Research on the characteristics of insulated gate bipolar transistor (IGBT) and its drive circuit

26. Research on the drive circuit of power transistor (GTR)

27. Research on the characteristics of power transistor (GTR)

28. Soft switching technology experiment

29. Performance research of DC chopper circuit

30. Performance research of single-phase AC/DC frequency conversion circuit

31. Chopping AC voltage regulation experiment

32. Full-bridge DC/DC conversion circuit experiment

33. Single-ended forward switching power supply experiment

34. Single-ended flyback switching power supply experiment

Ⅴ、Product technical function description

1. Safety protection description of the experimental bench

1) Personal safety protection of the equipment

① The floating protection of the three-phase isolation transformer completely isolates the experimental power from the power grid, which plays an effective role in protecting personal safety;

② The three-phase power input end is equipped with a current-type leakage protector. The switch can be disconnected when the leakage current of the equipment is greater than 30mA, which meets the national standards for the safety of low-voltage electrical appliances;

③ The output end of the three-phase isolation transformer is equipped with a voltage-type leakage protection. Once there is a leakage voltage on the experimental bench, it will automatically trip.

④ The high-voltage experimental wire adopts a fully plastic enclosed wire. The inside of the wire is oxygen-free copper wire drawn into a hair-like thin multi-strand wire with a soft texture. The sheath is made of thick wire diameter and anti-hardening chemicals. The plug is made of solid copper parts to avoid the possibility of electric shock caused by students touching the metal part.

2) Equipment safety protection system

① The three-phase AC power output is equipped with dual overcurrent and short-circuit protection functions of electronic circuits and fuses. When the output current is greater than 3A, the power supply can be disconnected and an alarm indication will be given;

② The gate cathode of the thyristor and the observation holes of each trigger circuit are equipped with high-voltage protection functions to prevent students from miswiring;

③ The experimental table uses three types of experimental wires, which cannot be plugged into each other. The strong current uses a fully plastic enclosed safety experimental wire, and the weak current uses a metal bare experimental wire (the actual core copper diameter is larger than the strong current wire). The observation hole uses a 2# experimental wire to avoid the possibility of students misoperating and connecting the strong current to the weak point;

④ The AC and DC power supply of the experimental table is equipped with an overcurrent protection function.

2. Technical description of the control panel

1) Control panel and experimental table

The experimental table is made of aluminum alloy, and the desktop is made of high-density anti-corrosion and fireproof board. It has a beautiful shape and is equipped with two drawers and a storage cabinet for placing tools, hanging boxes and materials. The experimental table is equipped with four wheels for easy movement and fixation, which is conducive to laboratory layout.

2) GLPE-01 power control panel

Three-phase AC power supply: The three-phase 220V and 240V AC power supplies are output through the industrial knob band switch, providing input power for DC speed regulation and AC speed regulation with overcurrent protection. The power supply is supplied to students for experiments after passing through safety protection circuits such as current leakage protection, three-phase isolation transformer, and voltage leakage protection.

3) GLPE-01A auxiliary function panel

① Motor excitation power supply: Provides a set of DC motor excitation power supplies with independent power switches and a digital voltmeter.

② Reactor: Provides smoothing reactors and RC filters required in DC speed regulation experiments. The smoothing reactors use a center tap method, which are 50mH, 100mH, 200mH, and 700mH respectively. It maintains linearity when the current is less than 1.5A. The reactor can also be used as an inductive load in power electronics technology experiments.

③ DC regulated power supply: Provide ±15V/1A DC regulated power supply; 24V/2A DC regulated power supply. With independent switch and short circuit protection, overcurrent protection, etc.

④ Three-phase transformer: As the inverter transformer in the cascade speed regulation system and active inverter circuit.

⑤ Three-phase adjustable resistor: Provide a set of adjustable resistors 100-1000/1A for generator load resistance and other experimental resistive loads and as motor starting resistance.

⑥ Motor starting resistance: 0Ω, 2Ω, 5Ω, 15Ω, ∞ five-speed adjustable winding motor starting resistance.

3. Technical description of commonly used experimental components

1) GLPE-10A thyristor trigger circuit I component

Provide TCA785 integrated trigger circuit, sawtooth wave synchronous trigger circuit, sine wave synchronous trigger circuit lead out of each observation hole, convenient and safe operation.

2) GLPE-11A three-phase trigger circuit I component

Trigger circuit: uses digital integrated circuit, strong anti-interference ability, three-phase pulse interval is uniform, good consistency, produces double narrow pulses, pulse phase shift range is 0-160°.

3) GLPE-12 three-phase thyristor main circuit component

Main circuit: consists of 12 thyristors, 6 diodes, smoothing reactor, and RC absorption circuit.

4) GLPE-13A motor speed control circuit I component

Provides the following modules: reverser, zero blocker, given voltage, speed conversion, speed regulator unit and current regulator unit. Equipped with feedback resistors and capacitors of the regulator, the system parameters can be flexibly changed during the experiment to observe the effects of different parameters on system stability and response time.

5) GLPE-13-1 Motor Speed Control Circuit (II)

Provides the following modules: Torque Polarity Identification (DPT), Zero Level Detection (DPZ) and Logic Controller (DLC),

6) GLPE-14 Power Devices

This experimental module project not only includes the drive circuit and switch characteristics research of GTR, MOSFET, IGBT, GTO and other devices, but also analyzes the application of fast recovery diodes, high-speed optocouplers, inductors, etc. in power electronic circuits.

7) GLPE-15 DC Chopper Circuit

Six typical experiments can be completed: Buck Chopper, Boost Chopper, Boost-Buck Chopper, Cuk Chopper, Sepic Chopper, and Zeta Chopper. All circuits use discrete components and students build them by themselves.

8) GLPE-10B Thyristor Trigger Circuit II Components

Provides a three-phase bridge rectifier circuit consisting of 6 diodes and a single junction transistor trigger circuit to lead out each observation hole.

9) GLPE-16 Single-phase AC/DC frequency conversion principle

The experimental projects that can be completed are: (1) The process of SPWM wave formation; (2) The working conditions and waveforms of AC/DC frequency conversion circuits under different loads (resistance, inductance and motor), and the influence of working frequency on the circuit working waveform; (3) The working characteristics of IGBT tube dedicated integrated driver chip.

10) GLPE-17 Dual closed-loop H-bridge DC/DC conversion DC speed regulation system

The experimental projects that can be completed are: (1) Full-bridge DC/DC conversion circuit experiment; (2) Dual closed-loop reversible DC pulse width speed regulation experiment.

11) GLPE-30 Single-phase AC chopping control voltage regulation and soft switching technology

The single-phase AC chopping control voltage regulation circuit consists of a main circuit and a control circuit. The main links of the control circuit are: pulse width modulation PWM circuit, voltage and current detection unit, drive circuit, etc.

12) GLPE-31 single-ended flyback switching power supply

The input AC voltage range is 50V~200V, and the output is three sets of DC power supply, respectively +5V/5A; +12V/1A; -12V/1A. The output voltage change rate is less than 0.3% when the input AC voltage and DC output load change.

13) GLPE-32 single-ended forward switching power supply

Uses a dedicated integrated circuit as a PWM controller, which can directly drive the MOSFET power field effect tube.

14) YB10 AC digital voltmeter

Three AC voltmeters: with communication interface, multi-speed automatic range, industrial-grade cabinet 48mm*96mm, accuracy: 0.5 level, range: 0-500V.

15) YB11 AC digital ammeter

Three AC ammeters: with communication interface, multi-speed automatic range, industrial-grade cabinet 48mm*96mm, accuracy: 0.5 level, range: 0-5A.

4. Motor guide rail and motor technical description

1) DJ02 DC shunt motor: PN=185W, nN=1600r/min, IN=1.1A, UN=220V

2) DJ03 DC generator: PN=185W, nN=1600r/min, IN=1.1A, UN=220V

3) DJ11 three-phase wire-wound asynchronous motor: PN=100W, IN=0.6A, nN=1400r/min, UN=220, Y connection

4) DJ01 motor guide rail, photoelectric encoder and tachometer

5. GLPJ-01 experimental wire

The experimental connection wire adopts a highly reliable fully enclosed plug-in type, with oxygen-free copper wire drawn into 128 strands as thin as hair, soft texture, and the sheath is made of thick wire diameter and anti-hardening chemicals. The plug is made of solid copper.

Synchronous PC version:

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