Performance of Pulsating High-Frequency Current Injection Based Sensorless Control of PMSM
In the paper the principle and performances of the pulsating current injection based sensorless control of permanent magnet synchronous motor (PMSM) are analyzed theoretically and investigated by simulations.In the analyses,the effects of the speed EMF terms and the deviation between the actual d-axis high-frequency current and the command,which results from the limited gain and bandwidth of the current control loop,are all taken into account.It is shown that the pulsating current injection method can achieve stable position estimation in a wide speed range.But appreciable position errors will result at high speeds due to the cross-coupling effects of the speed EMFs and the tracking error between the actual and command carrier current.In order to improve the performance,a modified scheme is proposed.Its validity is confirmed by simulations.
permanent magnet synchronous motor sensorless control pulsating current injection performance effect of speed EMF
Wang Jianmin
School of Electrical Engineering Shandong University Jinan, China
国际会议
太原
英文
163-166
2013-04-06（万方平台首次上网日期，不代表论文的发表时间）