一、选择对象 磁极线圈是直流电机的重要组成部分,具有成本比重高,对产品性能影响大等特点。因此我们应用ABC分类法对某直流电机线圈所用的十一种原材料进行了成本比重分类(详见表1)成本,把铜线和云母带5450划为A类;聚酰亚胺薄膜和漆1053划为B类;石棉橡胶纸等七种材料划为C类。虽然铜线成本比重最大,但为了保证电机性能,线圈匝数 First, select the object The magnetic pole coil is an important part of the DC motor, with a high proportion of the cost, a great impact on product performance and other characteristics. Therefore, we applied the ABC classification method to classify the cost of one of the eleven raw materials used in the coil of a DC motor (see Table 1 for details). We classified the copper wire and mica tape 5450 as Class A; polyimide film and lacquer 1053 It is classified as Class B; seven materials such as asbestos rubber paper are classified as Class C. Although the copper wire has the largest proportion of the cost, in order to guarantee the performance of the motor, the number of coil turns