Design and Analysis of a 16/6 Bearingless Switched Reluctance Motor with Segment Hybrid Rotor Teeth

Abstract

In this article, a 16/6 bearingless switched reluctance motor (BSRM) with segment hybrid rotor teeth has been presented. To realize the decoupling control of torque and suspension force, the rotor teeth were divided into three torque teeth and three suspension teeth, and both of them are embedded in support part. First, both torque and suspension force are generated by short-circuit excitation, the flux linkage coupling between torque windings and suspension windings was eliminated, and the separate control of torque and suspension force was achieved. Then, by increasing the pole arc of suspension teeth, the inductance of suspension windings is kept constant, which eliminates the influence on the output torque when adjusting suspension force. Finally, the coupling degree is further reduced by using nonmagnetic material as the supporting part. In addition, to achieve a greater output torque, the torque teeth are processed into U-shape and optimized the pole arc of stator teeth and rotor teeth. The characteristics of inductance, flux linkage, and output torque are analyzed by the finite-element method, and the results show that the proposed structure basically achieves the decoupling control of torque and suspension force. (Non-member) was born in 1996, Rizhao, China.He received the B.S. degree in measurement and control technology and instrument from Shandong University of Science and Technology. His research interests include magnetic suspension artificial heart, precision instrumentation design, and system control.Jingkai Li (Non-member) was born in 1990, Zaozhuang, China. He graduated in measurement and control technology and instrument from Shandong University of Science and Technology. He is currently pursuing the M.S. degree in system control and automation instrumentation. His research interests include magnetic suspension artificial heart, magnetic suspension control system and sensorless detection of bearingless switched reluctance motor.Jiaqing Li (Non-member) was born in 1996, Jining, China.He received the B.S. degree in mechanical design manufacture and automation major from Zaozhuang University, and he is currently pursuing the M.S. degree in mechanical engineering. His research interests include advanced manufacturing technology and precision instrumentation.

Switched Reluctance Motors and Drive Systems for Electric Vehicle Powertrains: State of the Art Analysis and Future Trends

“…A new four phase 8/6 SRM with two layer structure is proposed in [46] with a combined generator. In [6] a 16/6 SRM is introduced with segmented hybrid rotor teeth. In addition, it introduced the SRM in the 2D structure that the segmental teeth have been separated into suspension teeth and torque teeth.…”

“…Two approaches are used to decrease torque ripples: structural design and advanced SRM control methods [4]. Furthermore, multi-stack and multi-layer structures were introduced to further reduce the torque ripples of the SRMs [5][6][7][8]. Different converter topologies and control methods were developed to decrease the torque ripples [4].…”

Decoupling Characteristics and Torque Analytical Model of Sharing-Suspension-Windings Bearingless Switched Reluctance Motor Considering Flux-Linkage Saturation

“…As bearingless switched reluctance motor has the advantages of simple structure, high reliability, and ease of control. The sharing-suspension-windings bearingless switched reluctance motor has obvious advantages in the research field of the bearingless motor, such as the outstanding motor structure which makes the torque and radial force decouple, low hardware cost, and simple control method [1][2][3][4][5].…”

Control System Design for 16/6/8 Double-Stator Bearingless Switched Reluctance Motor

“…Based on the structural characteristics, four types can be distinguished: mixed stator tooth structure, wide rotor tooth structure, double-stator structure, and composite rotor structure [5][6][7][8][9][10][11]. e dual stator structure, with the outer stator winding providing the torque and the inner stator winding providing the levitation, provides better decoupling and easier control by separating the torque and levitation force magnetic circuits [10,[12][13][14].…”