Direct Control Method for Linear-Rotary Switched Reluctance Motor with Two Radial Windings

• Published in: IEEE transactions on industrial electronics (1982) Vol. 71; no. 4; pp. 1 - 10
• Main Authors: Shi, Ruijie, Cao, Xin, Deng, Xu, Deng, Zhiquan, Hao, Zhenyang, He, Zhouhui, Meng, Xuying
• Format: Journal Article
• Language: English
• Published: New York IEEE 01.04.2024; The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
• Subjects: Air gaps; Algorithms; Axial forces; Axial stress; Coils (windings); Control algorithms; Control methods; Control theory; Couplings; Direct Torque Control and Direct Axial-Force Control; Electric motors; Force; Linear Rotary Switched Reluctance Motor; Reluctance; Rotors; Stators; Torque; Two degrees of freedom; Windings
• ISSN: 0278-0046; 1557-9948
• DOI: 10.1109/TIE.2023.3279568

For Linear-Rotary Switched Reluctance Motors (LRSRMs) with two radial windings, the coupling between torque and axial force increases the complexity of control. Due to the calculation of current in existing control method for LRSRMs, the complicated derivation of current expression was necessary, and some constraints were also introduced which meant the difficulties on designing the current control algorithm were greatly increased. In order to solve these problems, a direct torque and direct axial force (DTC&DAFC) control method is proposed in this paper. By the way of selecting appropriate space voltage vectors, the proposed method can directly regulate torque and axial force at the same time to achieve rotation and linear motion and significantly reduce the ripple of the torque. Moreover, the mechanism of two-DOF motion and the principle of the proposed method are demonstrated in detail based on a 6/4 LRSRM with two radial windings. Based on MATLAB/Simulink and the experimental prototype, the feasibility of the proposed control method has been verified according to the simulation and experimental results.