永磁同步电机直接转矩控制系统的改进  

Improvement on Direct Torque Control of Permanent Magnet Synchronous Motor

作　　者：陶生桂[1] 袁登科[1] 刘洪[2] 

机构地区：[1]同济大学沪西校区电气工程系,上海200331 [2]华东交通大学电气与电子工程学院,江西南昌330013

出　　处：《同济大学学报（自然科学版）》2005年第5期678-682,共5页Journal of Tongji University:Natural Science

摘　　要：介绍了一种恒定开关频率的永磁同步电机直接转矩控制方法,通过定子磁链及幅值给定、定子电流来计算在恒定开关周期内加在电机定子绕组上的电压,采用空间电压矢量调制方法使逆变器的开关器件处于恒定的工作频率.开关频率越高,其控制性能越好.仿真结果验证了方法是有效的.A new method of the direct torque control(DTC) of permanent magnet synchronous motor with constant switching frequency is presented in this paper.Based on stator flux and magnitude given,and the stator current,the stator voltage needed in the switching period is calculated.And then the space voltage vector pulse width modulation method is adopted to keep the switching frequency constant.The higher the switching frequency is,the better the performance is.The simulation result illustrates the effectiveness of the proposed method.

关 键 词：直接转矩控制 永磁同步电机 空间电压矢量调制 

分 类 号：TM301.2[电气工程—电机]