Our parallel resonance induction heating power supply system has demonstrated long-term reliable operation
#Company News ·2021-11-22 18:29:27
Parallel Resonance Induction Heating Power Supply System Operational Status:
The parallel power supply has undergone long-term operation and performance optimization on customer production lines, with reliability and stability verified in heat treatment fields such as through-heating and quenching.
Full digital control has resolved multiple issues associated with parallel power supplies, featuring a wide sweep frequency range, automatic identification of optimal points for multiple workstations, fast tracking speed, and various protection functions.
Operation Steps:
After wiring the main control board, power it on and check for any system faults or abnormal prompts. If present, resolve them before proceeding to the next step.
Disconnect the communication cable between the IGBT main control board and the SCR rectifier board. Test the outputs of both control boards independently. Set the rectifier board's operation mode to "open-loop" and the control mode to "local." Use a 10K potentiometer to adjust the output and verify the wiring and output of the SCR rectifier board. Incandescent bulbs can be used for output testing. (Simultaneously observe whether the voltage or current collected by the feedback board is normal.)
Enter the test mode on the IGBT main control board to output inverter waveforms. Observe the oscilloscope for overlapping times of approximately 3 µs and ensure the output waveforms are correct.
Once the wiring and outputs of both control boards are confirmed correct, set the IGBT main control board to output the resonant frequency in test mode. Then, configure the rectifier board to "open-loop" and "local," and adjust the potentiometer to set the input signal on the display to a low-voltage state. Perform low-voltage output testing and observe whether the phase value is correct. If not, reverse the inverter voltage feedback lines.
After completing step 4, reconnect the communication cable for joint testing. Ensure the SCR rectifier board control mode is set to "communication" beforehand.
Perform basic parameter settings according to the different adjustment modes outlined below (note the text in red). Users must first configure the system's protection function parameters (such as rectifier overcurrent, rectifier overvoltage, and reverse voltage protection values) before proceeding with testing.
Once the basic and protection parameters are set, proceed to "start operation" for output testing.
During initial testing, set the output voltage on the main interface to approximately 60-100V for low-voltage testing.
The communication cable between the IGBT main control board and the SCR rectifier board: A+ B-. After connecting, the IGBT SD320 main control board controls the SCR rectifier board.
Special Note: For quenching applications involving dual workstations with alternating processing, ensure that when switching workstations after heating completion, the "operation relay" indicator on the SD320A main control board controls the disconnection of the inductor. This ensures the power supply stops before disconnecting the inductor, preventing interference or other control issues that could cause the power supply to continue outputting while the inductor is disconnected, potentially leading to device failure.