Analytical Modeling of Radial Electromagnetic Force for Switched Reluctance Motor Considering Saturation Effect

Abstract:

A novel analytical model of electromagnetic force for switched reluctance motor (SRM) was presented to calculate and analyze the radial electromagnetic force quickly. The model takes the influence of saturation into account, and reflects the distributing characteristics of electromagnetic force for the SRM. The magnetomotive force (MMF) and airgap equivalent permeance was computed based on the flux tube method, and an analytical model of airgap magnetic field was established based on the magnetomotive forcepermeance theory. The influence of saturation on SRM was analyzed, and the previous airgap magnetic field model was improved by considering the saturation effect. A mathematical model of radial distributive electromagnetic force was built based on the Maxwell’s tensor method, and the accuracy of the model was validated by comparing with the simulation results. The proposed model establishes the relationship between the electromagnetic force and the motor parameters, which is suitable for fast computation of the radial electromagnetic force in the design stage and analysis of the NVH behavior of the SRM.