带齿槽转矩补偿的横向磁通永磁电机DTC技术研究  

DTC Technology of Transverse Flux Permanent Magnet Motor with Cogging Torque Compensation

作　　者：沈洁 陈志辉[1] 段津津 苏有成 SHEN Jie;CHEN Zhihui;DUAN Jinjin;SU Youcheng(College of Automation Engineering,Nanjing University of Aeronautics and Astronautics,Nanjing 211100,China)

机构地区：[1]南京航空航天大学自动化学院,江苏南京211100

出　　处：《电机与控制应用》2021年第9期1-7,共7页Electric machines & control application

基　　金：国家自然科学基金项目(51677090)。

摘　　要：横向磁通永磁电机(TFPMM)因结构特殊,存在功率因数低、转矩脉动大等问题,需要改进控制算法来降低电机的转矩脉动,改善控制系统性能。在传统的直接转矩控制(DTC)基础上提出空间矢量调制(SVM)的DTC策略,以改善传统控制策略中电流、磁链控制不精确,转矩脉动大的问题。针对TFPMM齿槽转矩比较大的问题,将电机齿槽转矩拟合成电角度的表达式,补偿到转矩观测器输出端,使转矩观测器能观测齿槽转矩分量,起到抑制齿槽转矩脉动的作用。仿真结果验证SVM-DTC比传统DTC的电流波形更平滑,磁链控制更精确。采用齿槽转矩补偿的方法后电机转矩脉动显著减小,验证了补偿控制算法的有效性。改进的控制算法提高了电机控制系统整体性能。Because of the special structure,transverse flux permanent magnet motor(TFPMM)has some problems such as low power factor and large torque ripple,so it is necessary to improve the control algorithm to reduce the torque ripple and improve the control efficiency.Based on the traditional direct torque control(DTC),a DTC control strategy using space vector modulation(SVM)is proposed to solve the problems of inaccurate current and flux linkage control and large torque ripple in the traditional control strategy.Aiming at the problem of large cogging torque of TFPMM,the motor cogging torque is fit into the expression of electrical angle,and compensated to the output of torque observer,so that the torque observer can observe the cogging torque component,and then the cogging torque ripple can be suppressed.Simulation results show that SVM-DTC has smoother current waveform and more accurate flux linkage control than the traditional DTC.After adopting the cogging torque compensation method,the motor torque ripple is significantly reduced,which verifies the effectiveness of the compensation control algorithm.The improved control algorithm enhances the overall performance of the motor control system.

关 键 词：横向磁通永磁电机 直接转矩控制 空间矢量调制 齿槽转矩补偿 转矩脉动抑制 

分 类 号：TM341[电气工程—电机]