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PARTIAL DISCHARGE DETERMINATION METHOD, PARTIAL DISCHARGE DETERMINATION APPARATUS, AND PARTIAL DISCHARGE DETERMINATION SYSTEM FOR POWER DEVICE, AND METHOD FOR MANUFACTURING POWER DEVICE INCLUDING THE PARTIAL DISCHARGE DETERMINATION METHOD
PARTIAL DISCHARGE DETERMINATION METHOD, PARTIAL DISCHARGE DETERMINATION APPARATUS, AND PARTIAL DISCHARGE DETERMINATION SYSTEM FOR POWER DEVICE, AND METHOD FOR MANUFACTURING POWER DEVICE INCLUDING THE PARTIAL DISCHARGE DETERMINATION METHOD
A partial discharge determination method and apparatus, and a partial discharge determination system capable of indicating how much margin is left before dielectric breakdown, in a lighting impulse withstand voltage test, and a power device for which whether partial discharge is caused is determined by them, and a method for manufacturing a power device including the partial discharge determination method. A low-pass filter receives an acoustic signal resulting from application of an impulse voltage and acquired by an acoustic emission sensor, and removes an electromagnetic noise superimposed on the acoustic signal. A mechanical oscillation removal unit removes a mechanical oscillation component of a device under test, from the acoustic signal resulting from application of the impulse voltage which is a high voltage, based on the mechanical oscillation component acquired in advance and included in the acoustic signal resulting from application of the impulse voltage which is a low voltage.
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