High-voltage filter capacitor group resonant frequency testing device and method

The invention relates to a high-voltage filter capacitor group resonance frequency testing device and method. The device comprises an acquisition circuit, a control circuit and a display circuit. Theacquisition end of the acquisition circuit is connected with a high-voltage filter capacitor group, and the output end thereof is connected with the control circuit. A discharge sinusoidal waveform signal of the high-voltage filter capacitor group is acquired and shaped. A pulse signal is output to a control module when the periodic discharge sinusoidal waveform signal crosses zero. The output endof the control circuit is connected with the display circuit. The pulse signal waveform period is calculated and converted into frequency, and a frequency signal is generated and transmitted to the display circuit. The display circuit displays the data of the frequency signal. Compared with the prior art, the device and method, which are provided by the invention, test the high-voltage filter capacitor group, and have the