Optimization Analysis on Suspension Control Characteristics of a Bearingless Brushless DC Motor
Qiu Zhijian1,2, Ma Dongxu2, Wei Kangni2
1. Shanghai Key Laboratory of Power Station Automation Technology Shanghai 200444 China; 2. School of Mechanical and Electrical Engineering and Automation Shanghai University Shanghai 200444 China
Abstract Aiming at problems of suspension force ripple in the suspension windings control methods of bearingless brushless direct current motors(BBOCM), eight kinds of conduction rules under different boundary conditions are deduced based on the principle of determining the conduction phase of suspension windings. Then, suspension force ripples of these rules are compared and analyzed with the FEA software to obtain the optimal suspension conduction rule. Finally, the influence of torque winding loading on suspension force ripple is analyzed by using air gap magnetic density waveforms. And conduction intervals of suspension windings are further optimized, which provides theoretical support for suspension optimization control methods of bearingless brushless DC motors.
Qiu Zhijian,Ma Dongxu,Wei Kangni. Optimization Analysis on Suspension Control Characteristics of a Bearingless Brushless DC Motor[J]. Transactions of China Electrotechnical Society, 2019, 34(23): 4939-4947.
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2019, Vol. 34 
