一种单相电容电机变频调速方法

为使单相电容电机可作高性能的变频调速，根据这种电机结构和特点，利用磁通空间矢量的电机内近似构成圆形旋转磁场的原理，提出了一种新的变频调速方法，并对相关的控制模式和参数计算作了探讨。结果表明：该方法具有优良的起动和调速特性，尤其便于电机的恒转矩或恒功率调速控制。另外，该方法所使用的主电路可兼顾三相电机的变频调速。

A Method of Variable Frequency and Variable Speed Control for Single Phase Capacitor Motors

Based on the structural features of single phase capacitor motors and on the principle of using space vector of magnetic flux to approach the rotating round magnetic field in the motors, a new method of variable frequency and variable speed control of single phase capacitor motors is proposed for variable speed control with good performance. The related control mode and the calculation of some parameters are approached. Results show that this method has excellent characteristics of start and speed control, and is especially good at speed control of motors with constant torque and constant power. Besides, because the power circuit can also be used in three phase motors' VVVF control, this method has a high practical value.