Transactions of China Electrotechnical Society  2015, Vol. 30 Issue (14): 177-183    DOI:
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Radial Force Compensation Method of Single Winding Bearingless Flywheel Motor Application to Flywheel Energy Storage
Yuan Ye1,Sun Yukun2,Huang Yonghong1,Yang kai1
1. College of Electrical and Information Engineering, Jiangsu University Zhenjiang 212013 China;
2. College of Electrical Engineering, Nanjing Institute of Technology Nanjing 211167 China

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Abstract  The position of rotor and stator in switched reluctance motor is exchanged to obtain the single winding bearingless flywheel motor(SWBFM), which is more useful for flywheel energy storage. The suspension force and torque are produced by single windings and the rotor could direct drive the flywheel with less mechanical transmission. The accurate mathematical model of Maxwell stress tensor method obtained by finite element analysis and the correction factor is the basis to control motor stable and depends on the selection of integrating path. Considering the relationship between the angle and the radial force coefficient, and the difference of radial force coefficient with each tooth pole, radial force compensation methods of βdirection constraint and without βdirection constraint are present to ensure the SWBFM stable suspension under the condition of winding fault. The results show that the proposed compensation methods are feasible and have high precision.
Key wordsFlywheel energy storage      single winding      bearingless flywheel motor      Maxwell stress tensor method      radial force compensation     
Received: 10 August 2014      Published: 08 September 2015
PACS: TM315  
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Yuan Ye
Sun Yukun
Huang Yonghong
Yang kai
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Yuan Ye,Sun Yukun,Huang Yonghong等. Radial Force Compensation Method of Single Winding Bearingless Flywheel Motor Application to Flywheel Energy Storage[J]. Transactions of China Electrotechnical Society, 2015, 30(14): 177-183.
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