The lifetime model of turn-to-turn insulation in inverter-fed motors is studied. A lifetime model has been built by considering the effect of inverter-generated high voltage rise rate (dv/dt up to 20 V/ns). This model is followed by the generalised probabilistic model, in which the lifetime is proportional to the nth power of the voltage rise rate. Moreover, by investigating the effect of voltage rise rate on the partial discharge characteristics, it is found that the effect of voltage rise rate on the charge transport process in a voltage cycle is similar to that of the voltage amplitude. The enhanced partial discharge activity and induced charges are responsible for accelerated ageing and thus determine the final lifetime of turn-to-turn insulation. In this case, the generalised probabilistic electric lifetime model is applicable to the voltage rise rate as well as the voltage amplitude.

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逆变器供电电机匝间绝缘的与电压上升率相关的广义概率寿命模型

研究了逆变器供电电机匝间绝缘的寿命模型。通过考虑逆变器产生的高电压上升率（d v /d t高达 20 V/ns）的影响，建立了寿命模型。该模型遵循广义概率模型，其中寿命与n成正比。电压上升率的三次方。此外，通过研究电压上升速率对局部放电特性的影响，发现电压上升速率对电压周期内电荷传输过程的影响与电压幅值的影响类似。增强的局部放电活动和感应电荷会加速老化，从而决定匝间绝缘的最终寿命。在这种情况下，广义概率电寿命模型适用于电压上升率和电压幅值。