摘要：电动机的电枢主电路包括：电枢绕组电路和电源二部分，属运动控制类的各种交流电动机，具有多相交流电枢绕组电路和逆变器供电的电源。与传统直流电动机原理一样的New DCM，具有直流的电枢绕组电路，通过电子换向器与直流电源相连。逆变器和电子换向器都是功率开关管的桥式电路，硬件电路上不易区分，容易混淆。本文用实例说明电子换向器不是逆变器，换向器构筑直流电枢绕组电路的独特功能，使得它与交流电枢绕组电路完全不同，电枢绕组电感对电动机运行性能的影响也随之不同。
关键词：新直流电动机，多相交流电动机，逆变器，电子换向器

Abstract:  The motor armature main circuit including: the armature winding circuit and power supply, all kinds of motioncontrol AC motors have the multiphase ac armature winding circuit and inverter power supply. The New DCM , with same principles of the traditional DC machines, has the DC armature winding circuit connected to DC power through electronic commutator. Inverter and electronic commutator is not easy to distinguish from hardware circuit structure, easy to confuse. This paper demonstrates the electronic commutator not inverter,the unique functions of the electronic commutator is to make the armature winding circuit as DC circuit, therefore ,the armature winding circuits between New DCM and AC motor are completely different, the influences of the armature winding inductance to motor performance are different ,too.
Key words:  New DCM； multiphase AC motor； inverter；electronic commutator