由直流电动机到广义直流电动机自控方式的发展

摘要

Based on the analysis of the armature rotating mmf of dc motor according to ac viewpoint, it was explained that the resulting mmf produced by multiphase currents with rectangular wave corresponds to that produced by three phase currents with sine wave. The clamping effect in field is always formed on condition that the phases of armature current are self-controlled. It is more complex on technique to carry out self-controlling the phases of sine-wave current, but the transvector control is an effective measure for this purpose. The clamping effect in the motor body with three phases sine-wave currents has the character of adjustable power angle or torque angle, but it is essentially different to the synchronous motor where the power angle is an independent variable.%从以交流观点分析直流电动机的电枢旋转磁动势着手，阐明多相矩形波电流产生合成磁动势的效果与三相正弦波电流相当，电枢电流相位自控条件下必形成气隙磁场箝位。对正弦波电枢电流实施相位自控在技术上复杂许多，矢量控制则是对正弦波电流实施相位自控的有效手段。三相正弦交流的电机本体内气隙磁场箝位还呈功角或转矩角可行调整的特点，但与同步电机以功角作为自变量有本质差异。据此，联系电机可逆运行原理也能辨明广义直流电动机不是同步电机的新发展而是直流电机的新发展。