首先阐述直流电动机的自控变频运行机制,磁极d轴的检测是电枢电流相位自控的先决条件, 磁极位置检测器件或方式的改革演变可视为直流电动机向无换向器化发展的标志。无换向器电动机是直流电动机向无换向器化发展的起步,继而开发正弦交流电机本体的自控变频电动机系统,包括矢量控制技术的应用。今后更可借助计算机控制技术来检测磁极d轴的位置和转速,实现电枢电流或电压的相位自控,推动直流电动机无换向器化进程的深入发展。然而,发展的归宿不是同步电动机而是广义的直流电动机。

The operational mechanism of DC motor with selfcontrolled frequency was explained at first. Sense on polar daxis was a prerequisite for selfcontrolled phase of armature current. Reform and evolution of the position sensor may be regarded as a mark of development on DC motor less commutator. The commutatorless motor was the forerunning of the development on DC motor less commutator. The successor was the motor system with selfcontrolled frequency consisted of the motorbody with sinusoidal current, including application of the transvector control technique. Sense on position and speed of polar daxis in order to selfcontrol the phase of armature current or voltage with the help of computerassisted controlling technique may be developed hereafter. It would gave an impetus to progress towards deepened development on DC motor less commutator. However, the outcome of development becomes of the generalized dc motor rather than synchronous motor.

TM 351