DC switch test device, electronic industry specific instrument

DC high current generatorDC switch test device（20000A-16000A-15000AMultiple parallel outputs

2、 Usage conditions

1.Altitude not exceeding 1000 Rice;

2.An environment free from corrosive gases such as acid and alkali, or other harmful gases, as well as flammable and explosive gases;

3.The temperature range of the surrounding air during work should be within-10℃～40The temperature range of the surrounding air during transportation and storage should be within ℃-25℃～55℃；

4.Average relative humidity<90%；

5.Power supply quality: fluctuation range of power supply voltage 380±10%. Imbalance ≤5%The frequency fluctuation of the power grid shall not exceed ±2%.

3、 Performance and Parameters

（1）Efficient and energy-saving: By adopting full range soft switching technology, digital control technology, and optimizing the design of each link, the overall efficiency of the machine reaches70%Above, the power factor is greater than 0.9Energy saving compared to ordinary hard switch high-frequency power supplies3%Above, compared to traditional thyristor electricity Energy saving source15%above;

（2）Promoting production capacity: Due to the high precision of power control and small ripple, the output can accurately meet the process requirements.

（3）Small size and light weight: The volume and weight of the series products are only the same as ordinary high-frequency power supply devices of the same capacity2/3Same capacity thyristor power supply1/4It can save a lot of copper and iron materials, is easy to transport and install, and occupies less space.

（4）Green and Reliable: The power supply device has been optimized for electromagnetic compatibility and overall heat dissipation through measures such as soft switching, power factor correction, fault diagnosis, multiple protection, and comprehensive reliability design. It has good reliability and less electromagnetic pollution;

（5）Digital Intelligence: Power Management, Control ModesPWMThe output has been digitized, the power output is flexible, the interface is convenient, and it has functions such as status monitoring and multi machine collaborative control;

1.system architecture

The system module mainly consists of three-phase rectification and filtering circuit, high-frequency inverter circuit, high-frequency transformer, high-frequency rectification and filtering circuit, low-frequency inverter output circuitPWMInverter control circuit, current stabilization, voltage stabilization control circuit, outputPWMThe control circuit, keyboard and display circuit, and fault protection circuit are composed of (see figure below). During operation, the three-phase power input of the power grid is rectified by a rectification and filtering circuit into540VDC, inverted by high-frequency inverter circuit2KHzHigh frequency voltage is stepped up by a high-frequency transformer and finally filtered by a two-stage inverter to obtain the set DC or AC square wave output. The steady current control circuit passes throughPWMControl circuit regulationPWMThe duty cycle of the pulse changes the output of the high-frequency inverter circuit, keeping the output voltage (or current) of the power supply constant and achieving the goal of stable current.

The high-frequency inverter circuit adopts a full bridge transformation structure and soft switching technology to achieve high-power, low loss high-frequency inverter. High frequency switching tube adopts high powerIGBTModules are used to improve power reliability, and Schottky rectifier modules are used for high-frequency rectifiers to enhance power efficiency. When a power failure occurs, the protection circuit is cut offPWMThe output and power input of the circuit protect the system and provide corresponding fault indications.

2Main technical indicators

a.Input voltage: three-phaseAC 380V±10％50Hz

b.Maximum input current:AC 65A

c.Power factor: ≥0.9Efficiency: ≥70％

d.Output characteristic: constant current

e.Output current:0～15000A

f.Steady current accuracy: ≤1％；

g.Cooling method: air cooling

h.Overall dimensions:680 ×600 ×750（mm）Including handle and wheel size

i.Weight:75（kg）

3、 Main functions