A new decoupling control strategy for bearingless switched reluctance motors based on improved mathematical model

This paper presents a new decoupling control strategy for a 12/8 bearingless switched reluctance motor (BSRM) with improved mathematical model. Firstly, the improved mathematical model is built by Maxwell stress tensor method selecting one-forth arc integration path of the fringing magnetic field. Then, a new decoupling control strategy is described. The average torque and radial force of the scheme is decoupled and the utilization of current is enhanced. Finally, finite element analysis (FEA) model under this control strategy is established, and simulation results verify that the proposed mathematical model and control strategy are effective.