摘要
提出了一种永磁同步电机的全数字化预测电流控制方案 .为了选择合适的电压空间矢量 ,实现电流跟踪控制 ,以固定频率采样定子电流 ,按电机模型计算出下一采样时刻逆变器的最优控制电压矢量 ,从而控制下一时刻实际定子电流去追踪下一时刻参考电流 .作者对电流跟踪性能作了深入地分析和仿真研究 ,并进行了初步实验 .研究结果表明 ,该系统具有良好的静态、动态性能 ,非常适用于全数字化高精度交流伺服系统 .
A completely digitized predictive current controlled SPWM inverter based on space vector is described.In order to choose suitable voltage space vector and achieve current?follow?control,The stator current with constant frequency is sampled.According to the motor?model,optimium?controlled voltage vector is computed at the next sample moment to control actual next stator current so as to follow next referene.The current follow up performances of this inverter are discussed in detail.The results of simulation and primary experiment show that the system has excellent static and dynamic performances,and is specially suitable for a high?precision complete?digitized AC servo system.
关键词
电流控制系统
永磁同步电机
数字化
电压矢量
predictive current control
curren followed SPWM inverter
optimium controlled voltage vector
