王鹏,赵明,周群.SVPWM电压下变频电机绝缘耐电晕寿命研究[J].电测与仪表,2023,60(1):42-47. Wang Peng,Zhao Ming,Zhou Qun.Study of the Corona- resistance Lifetime for Inverter-fed Motor Insulation Under SVPWM Voltages[J].Electrical Measurement & Instrumentation,2023,60(1):42-47.
SVPWM电压下变频电机绝缘耐电晕寿命研究
Study of the Corona- resistance Lifetime for Inverter-fed Motor Insulation Under SVPWM Voltages
Experiments were conducted to investigate the effects of different switching frequencies (6 kHz, 12 kHz, 18 kHz) and fundamental frequency (10 Hz, 50 Hz, 100 Hz, 150 Hz, 200 Hz) on the insulation corona- resistance lifetime of inverter-fed motors under the Space Vector Pulse Width Modulated (SVPWM) voltage, and compared with the results of the corona-resistance lifetime results under repetitive pulse square wave with the same switching frequency and duty cycles of 50%. The results show that : the lower the switch frequency, the longer the corona-resistance lifetime, but the more the time and dispersion of the corona-resistance lifetime results fluctuate at different fundamental wave frequencies; the higher the switch frequency, the shorter the corona-resistance lifetime, but the smaller the time and dispersion of the corona-resistance lifetime test results fluctuate at different fundamental wave frequencies;the 50% duty cycle repetitive pulse square wave can be used to replace the SVPWM wave to predict the corona-resistance lifetime of inverter-fed motor insulation, but can not accurately reflect its statistical characteristics. The higher the switching frequency, 50% duty cycle repetitive pulse square wave is more accurate in predicting insulation corona-resistance lifetime and dispersion of inverter-fed motor under SVPWM voltage.The research results are expected to provide theoretical and experimental basis for more accurate evaluation of the insulation lifetime of inverter-fed motors.
