拉伸对变频电机用漆包线耐电晕性能的影响

为了分析耐电晕漆包线在电机实际使用过程中的耐电晕性能,通过拉力试验机模拟耐电晕漆包线使用过程中的拉伸情况。首先通过拉力试验机对耐电晕漆包线进行拉伸,拉伸率分别为10%、15%。然后分别进行未拉伸漆包线、拉伸率10%及15%的耐电晕漆包线的击穿电压试验和耐电晕性能试验,并进行漆包线拉伸前后击穿电压和耐电晕寿命的比较。结果表明:拉伸率为10%、15%后漆包线击穿电压与未拉伸试样相比略有下降,拉伸15%后漆包线的击穿电压保留率超过85%。拉伸率为10%、15%的漆包线耐电晕性能与未拉伸试样比较有较明显的下降,拉伸率为15%的漆包线的耐电晕性能略差于拉伸率10%的漆包线,耐电晕漆包线拉伸率为10%时,其耐电晕性能保留率不足20%。

Effect of Tensile on Corona Resistance Performance ofEnameled Wire for Inverter Motor

To analyze corona resistance performance of enameled wire used for the inverter motors in the production process of that, using electromechanical universal testing machine to simulate the stretch of corona resistant enameled wire in the production process of insulation system for the inverter motor. First of all, corona resistant enameled wires were tensile using electromechanical universal testing machine, the elongation of enameled wires were 10%, 15% respectively. Then, initial enameled wire, enameled wire with 10% elongation and enameled wire with 15% elongation were breakdown voltage test and corona resistance test. The results showed that breakdown voltage of enameled wire with 10% elongation and enameled wire with 15% elongation were little worse than that of initial enameled wire, the breakdown voltage retention rate of enameled wire with 15% elongation was more than 85%. Corona resistance time of enameled wire with 10% elongation and enameled wire with 15% elongation were much worse than that of initial enameled wire, corona resistance time of enameled wire with 15% elongation was litter worse than that of enameled wire with 10% elongation. The corona resistance time retention rate of enameled wire with 10% elongation was less than 20%.