关键词: 朗缪尔探针诊断；探针电源；探针伏安特性曲线；H桥级联型；反馈控制
 ,

Abstract: A set of nonlinear electronic load simulating the current-voltage characteristics of Langmuir probe was developed, which was mainly composed of the cascade H-bridge converter with carrier phase-shifted sinusoidal pulse width modulation technique (CPS-SPWM) and the bidirectional DC/DC convertor. Simulation results and the preliminary test results of the prototype were shown that the system basically meets the expected requirements and can be used for testing the relevant parameters of the probe power supply and joint debugging the probe back-end electronics system.

Key words: Langmuir probe diagnosis, Probe power supply, Probe current-voltage characteristics, Cascade H-bridge converter, Feedback control