1.Modular structure design, many kinds of power electronics devices, thyristor firing circuits and controller are available.
2. Full protections: voltage and current mode leakage protection device; monitoring and short-circuit protection for the power supply output; timer & alarm recorder for students examining.
3. Abundant lab exercises
The equipment is composed of power control panel, many experiment units and guide rail motor.
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DJK01 power control panel
1. Phase loss/over-voltage indication and phase sequence check
The indicator lamp lights up of there is any phase loss and it alarms if the voltage exceeding 250V.
2. AC power supply (with over-current protection)
3-phase power supply 200V@3A for DC speed regulation
3-phase power supply 240V@3A for AC speed regulation
3. High-voltage DC power supply
Excitation power: DC 220V @0.5A with short-circuit protection
AC digital voltmeter: accuracy: class 1.0, used for 3-phase power grid voltage measurement;
One RMS value AC digital voltmeter: measuring range: 0~500V, auto ranging, accuracy: class 0.5, 3 and 1/2 -digit
display, used for voltage indication;
One RMS value AC digital ammeter: measuring range: 0~5A, auto ranging, accuracy: class 0.5, 3 and 1/2 -digit display,
with function of over-range alarming & indication and power cutting off, used for current indication;
One DC digital voltmeter: measuring range: 0~300V, input impedance: 10MΩ, accuracy: class 0.5, 3 and 1/2 -digit
display, used for voltage indication;
One DC digital ammeter: measuring range: 0~5A, accuracy: class 0.5, 3 and 1/2 -digit display, with function of
over-range alarming & indication and power cutting off, used for current indication.
Isolated transformer: there are RCCB, key switch, contactor, isolated transformer for isolating from the power
grid for safety;
Voltage-mode leakage protector 1: leakage protection on the circuit before isolated transformer, cutting off the
power if there is leakage;
Voltage-mode leakage protector 2: leakage protection on the circuits after isolated transformer and
experimental connection, cutting off the power if there is leakage, and alarming;
Current-mode leakage protector: cutting off power if the leakage current exceeding the threshold value;
Fully shrouded connections for protection against hazard of electric shock
Functions of lab service supervision including lab time set, alarming at expire time and faults history are
provided
12-way, 10-way, 4-way and 3-way sockets for power supply to application units; single-phase and 3-phase outlet
on both sides.
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| The kit consists of rotations encode and a digit-displayed rotations speed meter. All
components are easy machine coupling on a slide-rail base.
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3-phase variable resistor
| Three banks Used for loading purpose
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| Anti-parallel 3-phase bridges with over current/voltage protection. Firing interface,
inductive load, voltmeter and ammeter are provided.
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Firing circuit of 3-phase bridge
| Used with Thyristor bridge
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SCR firing circuits (single/3-phase)
| Containing firing circuits of UJT, sin wave synchronous phasing, saw-tooth phasing.
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DC Motor control system (1)
| Containing modules: set up (G), current feedback and over current protection (FBC+FA), speed
conversion (FBS), inversion (AR), isolation (TVD) and controller (1/2); Observing effects of
controller's parameters on system performance
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DC Motor control system (2)
| Containing modules: torque polarity (DPT), logic controller (DLC), zeroing detector (DPZ),
carrying out the experiment of reversible DC motor speed control without circulating current.
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| Comprises chopper and firing circuit
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| Including reference, over voltage protection resistors (Delta connected), diodes.
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| Containing SCR, MOSFET, IGBT, GTR. It's used with DJK06 for test of characteristics for test
of device drives.
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Variable resistors, capacitors
| For configuration of current/speed controllers
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Single-phase AC power supply & variable load
| Comprises a single-phase variable autotransformer (0~250V/0.5kVA), a rectifying filtering
circuit and 0~180Ω/1.3A (series) or 0~45Ω/2.6A (parallel) regulable resistance
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3-phase transformer and 3-phase uncontrolled rectification circuit
| Comprises a 3-phase core-transformer (primary coil voltage 127V, secondary coils voltages are
63.6V and 31.8V), 3-phase uncontrollable rectifying circuit
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| 220W/200V 1600n/min insulated level E
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| 185W/220V 1600n/min insulated level E
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3-phase wound-rotor induction motor
| 120W/220V(Y) 1380n/min insulated level E
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Additions to wound rotor induction motor
| Used together with 3-phase wound-rotor induction motor.
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| For connections between control panel mounted application units, the leads are fitted with
Shrouded connectors and made from soft isolated cable.
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Power electronics technology
1. Unijunction transistor firing circuit
2. Sine wave synchronous phase-shift firing circuit
3. Saw-tooth wave synchronous phase-shift firing circuit
5. Single-phase half wave controlled rectification
6. Single-phase half-controlled rectification bridge
7. Single-phase bridge full-controlled rectification and active inversion circuits
8. 3-phase half wave controlled rectification
9. 3-phase bridge half-controlled rectification
10. 3-phase half wave active inversion circuits
11. 3-phase bridge full-controlled rectification and active inversion circuits
12. Single-phase AC voltage control
13. 3-phase AC voltage control
16. Gate-Turn-off Thyristor (GTO) characteristics
17. Power MOSFET characteristics
18. Giant transistor (GTR) characteristics
19. Insulated-gate bipolar transistor (IGBT) characteristics
20. Parameters and characteristics test of the Thyristor-controlled DC motor drive system
21. Commissioning of the control blocks (SCR) of Thyristor-controlled DC motor drive system
22. Single-loop non-reversible DC motor drive system with speed/current/voltage feedback
23. Double-loop non-reversible DC motor drive system
24. Reversible Thyristor-controlled DC motor drive system with non-circulating current
25. Voltage/speed control system of double closed-loop 3-phase induction motor
26. Cascade speed control system of double closed-loop 3-phase induction motor
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| 220V/0.5A, with output short-circuit protection
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| Power mains input line voltage can be registered, the accuracy is 1.0%
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TRMS AC digital voltmeter
| Measuring range: 0~500V, auto switching, accuracy 0.5%, 3 and 1/2-digit displayed
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| Measuring range: 0~5A, auto switching, accuracy 0.5%, 3 and 1/2-digit displayed, with over-ranging alarm, indicating and power supply cutoff protections.
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| Measuring range: 0~300V, 3 and 1/2-digit displayed, input impedance: 10MΩ, accuracy: 0.5%
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| Measuring range: 0~5A, accuracy 0.5%, 3 and 1/2-digit displayed, with over-ranging alarm, indicating and power supply cutoff protections.
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3 and 1/2-digit digital multimeter
| 1. DC voltage: 200mV/2V/20V/200V/1000V ±(0.5%+3)
2. AC voltage: 2V/20V/200V/750V ±(0.8%+5)
3. DC current:20uA/2mA/200mA/20A ±(1.5%+3)
4. AC current: 2mA/20mA/20A ±(1.5%+5)
5. resistance: 200Ω/2kΩ/20kΩ/200kΩ/2MΩ/20MΩ ±(0.8%+5)
6. conductance: (0.1-100)nS ±(1.0%+30)
7. capacitance: 20nF/200nF/20uF/200uF ±(4.0%+10)
8. frequency: 20kHz ±(1.5%+25) temperature: -40oC-1000oC ±(0.75%+3)
9. Special function: diode test, triode test, on/off alarm, low-voltage display, data hold, self-turning off, functional protection, self-recovery insurance, shakeproof, 10MΩ input impedance, 3 times/s sample rate, 40-400Hz AC frequency response, manual operation and the maximum display is 1999.
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25M two-channel digital oscilloscope
| 1. Homochromy LCD, two-channel
2. 250 MSa/s real-time sampling rate, effective sampling rate: 50 GSa/s, Waveforms capture rate 1000/s
3. Digital filter and waveforms recording
4. Cursor measurement including manual mode, follow mode and auto measurement mode
5. 10-group waveforms, 10-group set, storage and reappearance
7. Edge, video, pulse and delay triggering functions
8. Embedded FFT frequency spectrum analysis
9. Automatic calibration function
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