TC380 three-phase constant current and constant voltage thyristor trigger board

TC380 three-phase digital thyristor trigger board adopts 32-bit industrial-grade high-performance microprocessor, highly digital military quality design, mainly uses 1140V main loop power supply, supports network remote control and on-site control mode, Fuzzy-PID parameter openness Adjustment, integrating three adjustment methods of open-loop voltage regulation, closed-loop constant voltage and constant current, controls the thyristor to achieve constant voltage current limiting or constant current voltage limiting. The fault alarm and interface parameters are displayed in the Chinese menu on the LCD screen, and the set parameters are automatically stored. The control board has functions such as phase loss protection, power-on soft start, soft shutdown, constant current output, constant voltage output, overvoltage protection, overcurrent protection, short circuit protection, and working status indication. With three-phase fully controlled bridge rectifier, double reverse star rectifier and thyristor anti-parallel AC trigger mode, it can trigger thyristor below 5000A, suitable for resistive loads, inductive loads, Various load types such as capacitive load and transformer primary side are widely used in equipment such as electrolytic plating, charge and discharge, three-phase thyristor power supply and medium voltage rectifier power supply.

This trigger board uses industrial-grade high-performance microprocessors, and continues to lead the industry's core control algorithm and software technology innovation. The structure of the control software package and the processing speed of the single-chip microcomputer can ensure that the adjustment of all control loops is applied to the main circuit and six thyristors. The conversion time of the bridge is completed to ensure that the sampling time of the voltage and current loop is less than 3.33mS (50HZ power supply) or 2.77mS (60HZ power supply) to obtain superior performance.

The three-phase digital rectifier thyristor trigger board has a variety of given control signal options, supports 0-5Vdc, 0-10Vdc, 0-10mA, 4-20mA and other analog input automatic control modes, and can also be used with a potentiometer (10K 2W ) Manual control, flexible and convenient, reliable and stable, strong anti-interference ability, unique anti-interference measures, normal operation in harsh interference environment, complete control board self-diagnosis and load operation protection functions, power failure protection, overvoltage protection , Overload protection, phase failure protection, etc. Therefore, all kinds of interference and fault signals generated externally or internally will make the performance of the control board safer and more reliable because of the above-mentioned protection functions. All outputs adopt isolation technology, which has a wide range of applications and has complete fault detection, alarm indication and Protection function, all parameters are digital, no temperature drift changes, improve the regulation accuracy and power utilization efficiency.

1. Performance characteristics:

1.1. High-performance microprocessor, the components adopt high-stability imported components, manufactured by fully automatic SMD process, and the performance is stable and reliable.

1.2. With digital constant current and constant voltage functions and current and voltage limiting functions, it can accurately control the load, protect against abnormal over-current, over-voltage, and over-temperature and emergency stop functions.

1.3. The LCD display window displays various operating states in real time, and the input keyboard has an automatic lock function to prevent misoperation.

1.4. Intelligent PID control scheme, open parameters, can be flexibly set to any physical quantity, adapt to different types of loads, high control accuracy, and good dynamic characteristics.

1.5. Perfect fault detection and alarm function, real-time detection of load current, load voltage, control signal, feedback signal loss and other parameters.

1.6. Interface compatibility: Support 0-5Vdc, 0-10Vdc, 0-10mA, 4-20mA and other input automatic control modes, and directly interface with various instruments and PLC signals; it can also be manually controlled by potentiometer or panel buttons.

1.7. Phase loss protection: When the main circuit power supply has a phase loss, it will give an alarm and prompt the load to stop output in real time.

1.8. Soft start: When starting, the output voltage will gradually increase from zero to 100% to eliminate the impact on the grid and load. The soft start time parameter can be set.

1.9. Slow shutdown: When shutting down, the output voltage will gradually decrease from 100% to zero to eliminate the impact on the grid and the load. The slow shutdown time parameter can be set.

1.10. With the function of automatically identifying phase sequence, there is no phase sequence requirement for the power supply of the control panel, no external synchronization signal is required, debugging is free, and the wiring is convenient.

1.11, the current loop (voltage loop) feedback input signal supports various analog input signals such as transformers, Hall current (voltage) sensors, 0-75mV shunts, and 0-5V.

1.12, the SCR drive interface is equipped with double-row LED lights, the green light indicates whether the trigger board is faulty, and the red light indicates whether the external control line is correct. You can quickly check the error location.

1.13. The control board has a protection design against the burn-out of the SCR trigger interface, and supports input and output multi-function expansion boards.

1.14. Advanced MODBUS field bus communication function, RS485 fully isolated control (optional).

1.15. Remote control or on-site control mode, with communication control function between control boards at the same time, to realize one-to-many synchronous operation control (optional).

2. Technical specifications: