无刷直流电动机电枢等效电阻的实例研究

Model Study of Armature Equivalent Resistance in Brushless DC Motor

用典型结构和驱动方式的无刷直流电动机的实际数据 ,说明了通常认为电枢等效电阻基本上由绕组电阻决定的概念与事实有很大出入。指出换向等效电阻的影响不可忽略 ,它的值与电动机的转速成正比 ,在转速较高时 ,可以达到绕组电阻的若干倍。

Based on actual data of brushless dc motor with typical structure and drive mode, this paper shows that the conception used to think that armature equivalent resistance is basically determined by winding resistance does not fit the fact. Indicates that the effect of the commutation equivalent resistance should not be neglected, It's magnitude is in proportion to rotate speed of the motor and may be several times of the winding resistance when rotate speed is rather high. An experimental method to test armature resistance is proposed.