Development of Switching Power Module Based on SKHI 10/17 Driver

Abstract

In the experimental device of nuclear fusion, DC energy is injected into the secondary heating system by high-voltage power supply to improve the plasma temperature. Because the secondary heating system mostly uses klystron and neutral beam as the load, the output of the power supply should be meet the requirement of the load. The rising and falling edge of the high-voltage pulse power supply is short, the ripple is small and the stray energy storage of the system is small. The high-voltage pulse power supply based on step modulation technology is adopted as the main high-voltage power supply of the secondary heating system by researching the power supply used for the same type of load at home and abroad. This high-voltage power supply is used by several same switching power supplies in series, and high-voltage output can be obtained through by adjusting the delay time and duty cycle modulation, which has a good performance. According to the output parameter of single power supply 100A/850V, the Insulated Gate Bipolar Transistor (IGBT) module of 200A/1700V made by SEMIKRON is selected as the switch, and it is driven by the SKHI 10/17 driver. The rising time and falling time of the IGBT and power supply can be adjusted by adjusting the driving resistance.