Cao Jiayong  Zhou Zude  Chen Youping  Ai Wu

(School of Mechanical Science and Engineering, Huazhong University of Science and Technology, Wuhan 430074)

Zhan Qinghua

(School of Electrical and Electronic Engineering, Huazhong University of Science and Technology, Wuhan 430074)

Abstract: The switched reluctance-type power magnetic bearing (SR-type PMB) is a kind of mechatronical part, which can not only support suspensefully but also drive directly the spindle.  After the investigation of the characteristics of average torque (AT) control strategy, a new strategy of the instantaneous torque (IT) control for the SR-type PMB, which reduces the torque ripple significantly and simplify the control algorithms greatly, is proposed. In the IT control strategy, the radial forces and the drive torque are produced by the cooperatively by several phases. A control system of the SR-type PMB, including a support subsystem and a drive subsystem, is analyzed. And the simulations of such a control system are reported for the verification of the feasibility and the effectiveness of the proposed instantaneous torque control strategy.

Key words: Control strategy  Switched reluctance-type power magnetic bearings  Instantaneous torque control  Magnetic suspension shaft

CLC No: TM703.3  TM32

国家自然科学基金“两个基地”基金资助项目(5991076861). Received 20020906, received in revised form 20030317