一种应用于双三相PMSM的新型SVM-DTC  

A New SVM-DTC for DTP-PMSM

作　　者：陈相 周扬忠 陈艳慧[1] 钟天云[1] CHEN Xiang;ZHOU Yang-zhong;CHEN Yan-hui;ZHONG Tian-yun(Fujian Key Laboratory of New Energy Generation and Power Conversion,Fuzhou University,Fuzhou 350116,China)

机构地区：[1]福建省新能源发电与电能变换重点实验室,福州大学,福建福州350116

出　　处：《电力电子技术》2020年第5期108-112,共5页Power Electronics

基　　金：国家自然科学基金(51477031)。

摘　　要：此处提出一种能够同时控制多相电机多个自由度、准确合成期望电压矢量的新型多相空间电压矢量脉宽调制(SVPWM),为验证多相SVPWM的有效性,在中性点连接的凸极式双三相永磁同步电机(DTP-PMSM)上进行验证。新型多相SVPWM与DTP-PMSM控制目标结合形成一种定子谐波电流抑制、基波电磁转矩和磁链精确控制的新型空间矢量调制型直接转矩控制(SVM-DTC)策略。通过变比例转矩控制器得到定子磁链角度误差,结合定子电压关系推导出基波平面的期望电压矢量;谐波平面注入可消除对应定子谐波电流的期望电压矢量;新型SVM-DTC策略结合扇区划分的方式,选取多个空间电压矢量精确合成期望电压矢量。实验结果表明,新型SVM-DTC策略能够精确合成期望电压矢量,降低电磁转矩脉动,抑制谐波电流,节约控制器存储空间。A novel multiphase space voltage vector pulse width modulation(SVPWM)strategy is proposed,which can simultaneously control multiple degrees of freedom of multiphase motor and accurately synthesize desired voltage vectors.To verify the validity of multiphase SVPWM,this strategy is validated on the neutral point connected salient pole dual-three-phase permanent magnet synchronous motor(DTP-PMSM).A new direct torque control strategy based on space vector modulation(SVM-DTC)is proposed,which combines the novel multiphase SVPWM with the control objective of DTP-PMSM to suppress harmonic current of stator,to control fundamental electromagnetic torque and flux linkage accurately.Error of stator flux angle was obtained by variable proportional torque controller.Then,combined with the stator voltage relationship,the desired voltage vector of the fundamental wave plane is derived.Other harmonic planes are injected with the desired voltage vector to eliminate the corresponding stator harmonic current.Combining with sector division,the new SVM-DTC strategy choose space voltage vectors to accurately synthesize desired voltage vectors.The experimental results show that the new SVM-DTC strategy can precisely synthesize the desired voltage vector,reduce the electromagnetic torque ripple,restrain the harmonic current,save the memory space of the controller.

关 键 词：永磁同步电机 空间电压矢量 谐波电流抑制 

分 类 号：TM351[电气工程—电机]