压缩机电机绕组末态阻值的确定方法

Determination method of final resistance of winding in compressor motor

GB4706.17—2010只规定电阻法测绕组温升的过程,对最终的拟合公式并没有要求,在实际测试中,不同的测试人员或测试机构选择不同的拟合公式所得到的结果也将不同。本文介绍采用电阻法测绕组温升时,通过分析不同的拟合公式对末态绕组拟合结果的影响,确定最接近实际情况的拟合公式。分析结果表明,在实际操作中,使用二阶多项式拟合的末态绕组比较接近断电瞬间的末态绕组。

At present,GB 4706.17-2010 only states the test process of winding temperature rise using resistance method, but the final fitting formulas are not mentioned. There- {ore,in the actual test, the results will be different because of different fitting formulas chosen by different test personnels or testing institutions. Through analyzing the influences of different fitting formulas on the final winding fitting results, the fitting formula which is most close to the actual situation is determined. The analysis results show that final winding determined by the second order polynomial fitting is much closer to the final winding at the instantaneous power interruption in the actual operation.