A Novel Sensorless Rotor Position Estimation Method for PMSM Based on High-Frequency Square-Wave Voltage Injection with Less Iron Loss

Abstract

A novel sensorless rotor position estimation method for permanent magnet synchronous machine (PMSM) based on high-frequency square-wave (HFSW) voltage injection has been proposed in the article. Comparing with the existing HFSW voltage injection schemes, the proposed method features a unipolar injection into the estimated synchronous reference frame which can decrease the energy loss resulting from HFSW injection and hence improve the system efficiency. A practical calculation method based on the co-simulation platform integrating Matlab and finite-element analysis (FEA) tools are also proposed in the article to study and compare the energy loss resulting from different HF injection schemes. Both simulation and experimental verification are conducted in the article to verify the feasibility of the proposed strategy.

Keywords:

• PMSM
• sensorless rotor position estimation method
• high-frequency square-wave injection
• unipolar injection
• iron loss

Additional information

Notes on contributors

Wei Cui

Wei Cui received the B.S., M.S. from the School of Automation, Xi’an University of Technology, Xi’an, China, in 1994 and 1997, respectively, and the Ph.D. degree from the School of Mechatronics Engineering and Automation, Shanghai University, Shanghai, China, in 2004. He was a visiting scholar in Hong Kong University, Hong Kong, China, from Dec. 2004 to May. 2005 and in Sheffield University, UK from Jan. 2011 to Jan. 2012. Presently, he is an associate professor at Shanghai University. His fields of interest are power electronics and high-performance AC motor drive.

Fu-Xin Zhang

Fu-Xin Zhang received the B.S. from the School of Electric Engineering, Shanghai Daji University, Shanghai, China, in 2014. He is currently working towards M.S. degree in the School of Mechatronics Engineering and Automation, Shanghai University, Shanghai, China. His main research interest is focused on high-performance sensor-less control of permanent magnet synchronous motor.