Research on the Control Board to Detect the IGBT Operating Condition in Switching Power Supply

Abstract

The high-mode experiment can be obtained by heating the plasma with the auxiliary heating system in the controlled nuclear fusion research. The performance of the auxiliary heating system can be affected by the output of main high voltage pulse power supply. The high-voltage pulse power supply based on Pulse Width Modulation (PSM) technology has the advantages of high effective frequency and little energy storage of the filter system. It is of vital importance that the stored energy released to the load should be very little when some protections occur. The power supply will be connected to the load when the IGBT is out of control, and the AC source energy will be transformed to the load through the air switch. So the air switch should be triggered to disconnect from the AC mains. The control board can detect the IGBT operating condition by the IGBT drive signal, output signal and control signal. So control board can be used to trigger the air switch in a short time, and the energy released to load is very little, which ensures that the load is very safe under protecting.