Abstract
Although the conventional control strategy of Bearingless Switched Reluctance Motors (BSRMs) can realize stable suspension of the motor shaft, it still has disadvantages such as relying on the model calculation, strong coupling between torque and displacement, and poor anti-interference ability. In order to solve these problems, this paper studies a direct displacement control (DDC) strategy for single-winding BSRMs (SWBSRMs). This strategy draws on the control idea of magnetic bearings, and realizes the stable suspension of BSRMs on the premise of separating from the mathematical model online calculation. At the same time, the strategy realizes the decoupling of torque and suspension displacement, and has good anti-disturbance. Finally, experimental results show that compared with the conventional control strategy and DTC and DFC method, the DDC strategy reduces the execution time of the algorithm by 36.6% and 41.2% during steady-state; reduces the speed-up time by 60% and 23% during dynamic conditions; and reduces the speed-down time by 20% and 86.6%.
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