级联纳秒上升时间高压正极性方波电源拓扑设计与验证

This paper proposes a cascaded nanosecond rise time high-voltage positive polarity square wave power supply topology to meet the insulation assessment needs of SiC devices under high-voltage square wave conditions. The design and verification show flexible control of parameters such as frequency, rise time, and duty cycle, while maintaining functionality under single or multiple switch failures. A prototype achieved 4 kV voltage, 0 to 5 kHz repetition frequency, 0 to 100% duty cycle, and rise times between 80 and 300 ns, validating the feasibility and reliability of the proposed topology.