Transactions of China Electrotechnical Society  2020, Vol. 35 Issue (5): 1036-1045    DOI: 10.19595/j.cnki.1000-6753.tces.190347
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Operation and Sensorless Control of a Dual Stator Flux Modulation Electric Motor
Luo Xiang1,2, Zhu Li1,2, Guo Canxin3
1. School of Electronic Information and Electrical Engineering Shanghai Jiao Tong University Shanghai 200240 China;
2. Key Laboratory of Control of Power Transmission and Conversion Ministry of Education Shanghai 200240 China;
3. PDStars Electric Co. Ltd Shanghai 201114 China

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Abstract  This paper presents a dual stator flux-modulation electric motor (DSFM), which is based on the structure of magnetic gear by replacing the inner layer and outer layer of permanent magnets (PMs) with stator AC windings, and the middle layer is iron segments for flux-modulation. As the excitation magnetic field and armature magnetic field are both generated by the stator AC windings in DSFM, the amplitude, frequency and angle of the excitation magnetic field and armature magnetic field can be adjusted flexibly. Moreover, the functions of excitation magnetic field and armature magnetic field can be exchanged with each other. Therefore, the regulation range of the speed and torque in DSFM can be further improved. Additionally, as there is no PMs in the motor, DSFM has no problem of cogging torque. The structure and operation principle of DSFM are studied in this paper. Furthermore, sensorless control method based on sliding mode observer (SMO) for DSFM is realized in the paper. Finally, simulation and prototype tests are carried on to verify the operation principle and control theory of DSFM.
Key wordsFlux modulation machine      magnetic gear      double stator      sliding mode observer      sensorless control     
Received: 31 March 2019      Published: 12 March 2020
PACS: TM359.9  
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Luo Xiang,Zhu Li,Guo Canxin. Operation and Sensorless Control of a Dual Stator Flux Modulation Electric Motor[J]. Transactions of China Electrotechnical Society, 2020, 35(5): 1036-1045.
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