Four-Quadrant Sensorless Operation of Switched Reluctance Machine over the Wide Speed Range

Abstract

This paper presents four-quadrant sensorless control in switched reluctance machine (SRM) over the wide speed range. The proposed sensorless control technique could be employed not only at low speed with current chopping control (CCC) but also at high speed with angle position control (APC). At startup and low speed, the narrow voltage pulse is injected into the idle phases and the rotor position zone is determined by comparing the measured flux linkage with four flux linkage-current curves. The same flux linkage-current curves also can be adopted for rotor positions estimation at medium and high speeds. Two flux linkage-current characteristic curves in the inductance rising zone are employed to estimate the rotor position for motoring mode and the other two curves in the inductance falling zone are used to estimate the rotor position for braking mode. The experiments on a three-phase 12/8 pole SRM drive platform are carried out to verify the effectiveness of the proposed sensorless control technique.

Keywords:

• switched reluctance machine
• sensorless control
• four-quadrant operation
• rotor position estimation
• motor control
• flux linkage measurement
• wide speed range
• rotor position detector
• braking mode
• SRM drive

Additional information

Funding

The authors gratefully acknowledge the support of National Science Foundation of China (no. 51707192) and Xuzhou Social Development-Basic Application Research Project (no. KC18064).

Notes on contributors

He Cheng

He Cheng received his B.S. and Ph.D. degrees from the School of Information and Electrical Engineering, China University of Mining and Technology, Xuzhou, China, in 2010 and 2015, respectively. In 2017, he became an Associate Professor in the School of Electrical and Power Engineering, China University of Mining and Technology, Xuzhou, China. His current research interests include electrical motor drives, motor design and control, electric vehicles, and on-board charger for plug-in electric vehicles.

Xudong Ge

Xudong Ge received the B.S. degree from the School of Information and Electrical Engineering, China University of Petroleum, Qingdao, China, in 2016. He is currently working toward the M.S. degree in electrical engineering from the China University of Mining and Technology, Xuzhou, China. His research interest include integrated power electronic converters.

Lunjun Wang

Lunjun Wang received the B.S. degree from the School of Electrical Engineering, Anhui Polytechnic University, Wuhu, China, in 2017. He is currently working toward the M.S. degree in electrical engineering from the China University of Mining and Technology, Xuzhou, China. His research interest includes integrated drive system control of electric vehicle switched reluctance motor.

Lei Xu

Lei Xu received the B.S. degree from the School of Electrical and Automation Engineering, Nanhang Jincheng College, Nanjing, China, in 2017. And now he is currently working toward the M.S. degree in electrical engineering from the China University of Mining and Technology, Xuzhou, China. His research interest includes BMS in electric vehicles.