Modeling And Analysis For Radial Vibration Of The Stator System Of Switched Reluctance Motors Considering Coupled Magnetism And Solid Dynamic Characteristics

Switched Reluctance Motor(Switched Reluctance Motor abbreviation: SR Motor) is the integration of mechanical and electrical products,base on its high potential and efficient energy saving, It has important research value and application prospect. Vibration and noise is currently restrict switch reluctance motor used in more widely speed of the main causes of the field. This paper presents analytical models ofswitched reluctance motor in considering the magnetism and soldid coupling.(1) By means of the combination method of beam function, the analytic expressions formula of the inherent vibration modes of the stator system model are derived, and the inherent frequency of the stator system model is obtained.(2) In steady state the electromagnetic forces acting on the inner surface of the stator core are obtained in consideration of the radial vibration displacements with the magnetic field in air gap coupling of the stator core. While calculating the electromagnetic forces, the effect of the radial vibration displacements of stator core on the electromagnetic forces is taked into account.(3) The stator system vibration differential equation is established. Through using the method of multiple scales, the nonlinear dynamic characteristics of the forced resonances of the stator system model excited by electromagnetic forces are analyzed.This paper provides theory basis of switched reluctance motor for structure optimization design and prediction and control of electromagnetic vibration and noise.With a model of 8/6switched reluctance motor asan example,this paper verify the correctness of the analytical modelscomparing its resultswith the ones obtained using the finiteelementmethod.