Sensorless Vector Control of Five-phase Induction Motor under Open-phases Fault

Abstract

Abstract—This article deals with proposed solutions for five-phase induction motor drives, specifically aimed to sensorless vector control under an open-phases fault. Exploiting the modified transformation matrices for dual planes, the motor model in the synchronous frame is established under open phases. Torque ripple is reduced by particular magnitude ratio currents. Furthermore, the third harmonic current is used to improve iron utilization and torque density. The proposed sliding-mode observer method for wide-range speed estimation combined with online resistance identification is investigated, especially for low-speed operation. Experimental tests are performed to validate the effectiveness of the proposed method.

Keywords:

• sensorless vector control
• five-phase induction machine (IM)
• open-phases fault
• Sliding Mode Observer (SMO)
• low speed
• torque ripple
• iron utilization
• synchronous frame
• torque density
• online resistance identification

Additional information

Notes on contributors

Wubin Kong

Wubin Kong received a B.S. degree from the College of Electrical Engineering, Zhejiang University, Hangzhou, China, in 2009. He is currently working toward the Ph.D. degree. His research interests are in multiphase machines and drives.

Jin Huang

Jin Huang received the B.S. degree from the College of electrical engineering, Zhejiang University, Hangzhou, China, in 1982, and the Ph.D. degree in electrical engineering from the National Polytechnic Institute of Toulouse, Toulouse, France, in 1987, respectively. From 1987 to 1994, he was an associate Professor in College of Electrical Engineering, Zhejiang University, China. He is currently Professor of Zhejiang University. He is engaged in research on electrical machine, AC drives, multiphase machine and condition monitoring of electrical machines.

Bingnan Li

Bingnan Li received the B.S. and M.S. degrees from the College of Electrical Engineering, Shenyang University of Technology, Shenyang, China, in 2006 and 2009, respectively. He is currently working toward the Ph.D. degree from the College of Electrical Engineering, Zhejiang University, Hangzhou, China. His research interests are in multiphase theory, multiphase bearingless machines and drives.

LiHang Zhao

LiHang Zhao received a B.S. degree from the College of Electrical Engineering, Zhejiang University, Hangzhou, China, in 2011, where he is currently working toward the Ph.D. degree. His research interests are in parameter identification of AC motor.