The distributed capacitance of the reactor in the high-power plasma arc power supply circuit affects directly the quality of the output voltage waveform and

in some special applications directly causes the output to stop. How to accurately detect the distributed capacitance of the reactor in advance is the key to system design. In this paper

a kind of high-power reactor’s distributed capacitance test method and circuit based on the inductance parameter resonance method is proposed

which can accurately test the distributed capacitance parameters of the reactor

thus solving the design problem of high-quality chopping power supply systems.