Abstract

Evaluation was conducted of the partial discharge inception voltage resulting from inverter surge voltage in the magnet wire, also known as winding wire, of the main motor used in an electric-powered vehicle.Having clarified the influence of the waveform on partial discharge, the voltage waveform used for evaluation was configured to include waveform conditions under which partial discharge is most likely to occur during operation of the inverter in an electric-powered vehicle. With use of the inverter surge voltage, it was found that the partial discharge inception voltage rose 22% higher than the usual sine wave voltage. Envisioning the environment in which the main motor would be used, the influence of the environmental factors of ambient temperature, atmospheric pressure, and relative humidity on the partial discharge phenomena was also clarified. The use of inverter surge voltage for evaluation based on the above results yields the expectation that a rise in the partial discharge inception voltage can be expected. It also indicated that insulation design that takes the influence of the environmental factors into consideration can contribute to a reduction in the thickness of the insulation film.

References

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Author (organization or company)

• Makoto KUBOTA（Honda Motor Co., Ltd.）
• Yuta ITO（Honda Motor Co., Ltd.）
• Takeshi YANAGISAWA（Honda Motor Co., Ltd.）
• Yoshito TSUKAMOTO（Honda Motor Co., Ltd.）
• Riku INABA（Auto Technic Japan Co., LTD.）

Publication Information

Article of Honda R&D Technical Review Vol.35 (78 - 86)

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