Abstract:
Single winding bearingless switched reluctance motor (SWBSRM) with the advantage of high integration can realize two operation modes: full power torque operation and torque/suspension operation. However, it has limited output range of suspension force. A hybrid SWBSRM (HSWBSRM) is proposed by integrating the modular SWBSRM and the DC magnetic bearing. The suspension force density of the supporting system is further increased, and the power consumption of disturbance resistant suspension is reduced by means of wide and narrow tooth design, permanent magnet bias, and other technical means. The structure and operation principle of HSWBSRM are clarified, and the design constraints are revealed. A 3D finite element analysis model is built based on the parameters of the typical experimental prototype, and in-depth analysis is conducted focusing on the biased suspension characteristic, adjustable suspension characteristic, and cooperative suspension characteristic. Based on the analysis of the coupling characteristics of the system, the control strategy is proposed, and the control system is constructed, thereby verifying the feasibility of the prototype operation mechanism.