PWM供电的永磁同步电动机系统仿真

System Simulation of PWM Permancnt-Magnet Synchromotor

本文简单介绍了用于机器人或数控机床的永磁同步电动机伺服定位系统的计算机仿真方法。该系统用双闭环控制。转速内环采用比例积分调节器,位置外环采用比例调节器。利用微机对水磁同步电机进行磁场定向控制.电机用随机脉宽调制逆变器供电。对于数字控制的PI调节器采用差分方程.而对同步电机则采用连续系统的数值积分法.如龙格库塔法,建立离散化的数学模型计算结果定位精度较高,所得接近最佳点的调节器参数可作为实际控制的参考。

This paper presents a digital simulation method of PWM permanent-magnet sync- hromotor in directional servosystem for robot or digital control machine tool. This system uses control of double closed rings.The speed-ring uses proportion-integra- tor(PI),and place-ring uses proportioner. The permanent-magnet synchromotor is controlled directionally by microcomputer. This motor is fedwith randam PWM inverter.This paper gives mathematics model for digitol controlled PI regulator with difference equations, and for synchronmotor with digital integration method of continuous system, for example Runk-Kutta method. The calculated result has higher accuracy. The parameters used here near optimal point of regulator may be used as actual control of microcomputer.