Magnet Demagnetization Observation for Permanent Magnet Synchronous Motor
作者单位：The Department of Electrical Engineering Tsinghua University Beijing 100084 China
会议名称：《第11届国际电机与系统学术会议》
主办单位：China Electrotechnol Soc;Natl Nat Sci Fdn China;Korea Inst Elect Engineers;Inst Elect Engineers Japan;IEEE Ind Elect Soc;IEEE Ind Applicat Soc;Inst Engn & Technol
会议日期：2008年
学科分类：080801[工学-电机与电器] 0808[工学-电气工程] 08[工学]
基 金：Project 50607010 supported by National Natural Science Foundation of China
摘 要：正Accurate information of rotor permanent magnet field is needed in permanent magnet synchronous motor（PMSM） control,but this information is variable under demagnetization conditions,such as high temperature or peak current Nonsinusoidal flux density distribution caused by demagnetization induces to torque ripple,which degrades the PMSM drive *** estimate flux magnitude,a Kalman filter is built by using stator current and PM flux as state *** estimation method can accurately track the diversity of permanent flux and is robust to motors’ parameters. The flux linkage is represented by means of Fourier series expansion,and the observe method is used for the online detection demagnetization of *** evaluations of flux linkage are carried out on a DSP-controlled PMSM drive *** results obtained demonstrate the effect of the proposed method.