摘要
旋转高频注入法能够估算永磁同步电机零速和低速下的转子磁极位置,但在转子磁极位置解调过程中使用滤波器会带来估算误差。该文提出一种利用正序电流分量对转子估算误差进行在线补偿的方法,阐述了该方法在电机零速、低速运行过程中的补偿机理,理论推导在解调过程中正序电流和负序电流相位变化的关系,分析在考虑定子电阻影响时利用正序电流对滤波器导致误差的补偿效果。针对外差法求得的误差补偿量和转子位置存在多个收敛点的问题进行改进,增加收敛点检测环节,可排除部分错误收敛点。仿真和实验验证了所提方法对于转子位置误差补偿的效果。
The rotating high-frequency injection method can estimate the rotor position of permanent magnet synchronous motor at zero speed and low speed,but the use of the filter may bring estimation errors during the demodulation process of the rotor position.The paper presents a method for online compensation of rotor estimation error using positive sequence current component.The mechanism of the compensation method was described when the motor was in zero speed and low speed.The phase delay of positive and negative sequence current in demodulation process was theoretically derived.The compensation effect of the positive sequence current was analyzed considering the influence of the stator resistance.The error compensation amount and rotor position obtained by the heterodyne method have multiple convergence points.Hence,a convergence point detection was added to eliminate some error convergence points.Simulation and experiments verified the effect of the proposed method on rotor position error compensation.
作者
彭威
乔鸣忠
蒋超
张志斌
高键鑫
Peng Wei;Qiao Mingzhong;Jiang Chao;Zhang Zhibin;Gao Jianxin(School of Electrical Engineering Naval University of Engineering,Wuhan 430033 China)
出处
《电工技术学报》
EI
CSCD
北大核心
2020年第24期5087-5095,共9页
Transactions of China Electrotechnical Society
基金
国家自然科学基金资助项目(51877212,51807197)。
关键词
旋转高频注入法
转子位置估算误差
正序电流分量
在线误差补偿
Rotating high-frequency injection
rotor position estimation error
positive sequence current
online error compensation
作者简介
彭威,男,1992年生,博士研究生,研究方向为电力电子与舰船电力推进。E-mail:1530911613@qq.com;通信作者:乔鸣忠,男,1971年生,教授,博士生导师,研究方向为电力自动化和舰船电力推进。E-mail:qiaomingzhong@126.com。
