基于虚拟变量的六相永磁同步电机缺任意两相容错型直接转矩控制  

A Novel Direct Torque Control for Six-phase Permanent Magnet Synchronous Motor With Two Opened Phases Based on Defining Fictitious Variables

作　　者：林晓刚[1] 周扬忠[1] 程明[2] 

机构地区：[1]福州大学电气工程与自动化学院,福建省福州市350108 [2]东南大学电气工程学院,江苏省南京市210096

出　　处：《中国电机工程学报》2016年第1期231-239,共9页Proceedings of the CSEE

基　　金：国家自然科学基金项目(51477031);国家重点基础研究发展计划项目(973项目)(2013CB035603);江苏省博士后科研资助计划(1301010A)~~

摘　　要：为了进一步提高六相永磁同步电机驱动系统的可靠性,该文针对偏置60°六相对称绕组永磁同步电机提出一种缺任意两相容错型直接转矩控制策略。从控制圆形磁链角度,定义虚拟磁链及虚拟电流,并基于此,推导出任意两相开路时虚拟定子磁链和电磁转矩之间的关系式。利用剩余4相逆变器输出电压矢量,同时实现电磁转矩、虚拟定子磁链和零序电流直接控制。实验结果表明,采用所提控制策略,两相开路直接转矩控制驱动系统运行平稳,转矩和转速动态响应迅速。To improve the reliability of drive system for six-phase permanent magnet synchronous motor, a tolerated fault direct torque control（DTC） strategy was proposed for six-phase symmetrical winding shifted-phase 60 degree permanent magnet synchronous motor in this paper. In order to control the flux linkage be circular, fictitious flux linkage and current were defined, the relations between the fictitious stator flux linkage and electromagnetic torque based on it were proposed with any two opened phases. Torque, fictitious stator flux linkage and zero-sequence current were controlled at the same time by the output voltage vector through the remaining 4 phase inverters. The experimental results show that the presented control strategy ensures the drive system running smoothly with two opened phases, and having fast response of torque and speed.

关 键 词：六相永磁同步电机 容错 直接转矩控制 两相开路 零序电流 

分 类 号：TM351[电气工程—电机]