Method for acquisition of equivalent material parameters considering orthotropy of stator core and windings in SRM

Abstract

To solve the problem of the orthotropic material parameters acquisition, a novel method for the acquisition of the equivalent material parameters considering the orthotropy of the stator core and the windings in a switched reluctance motor (SRM) is proposed. First, a theoretical analysis of the influences of the orthotropic material parameters on the vibration characteristics is implemented. Second, according to the finite element (FE) equivalent model and the modal parameters obtained by the modal test, the equivalent orthotropic material parameters of the stator core and the windings are captured, respectively. Finally, considering the complex connections among components, a FE model of a SRM is established and validated by the modal test. The results indicate that the vibration characteristics of the FE model of the stator core and the windings with the orthotropic features can be analysed by assigning the equivalent orthotropic material parameters; the elastic modulus E x ( E y ) and the shear modulus G xy have effects on both the symmetric modal frequencies and the antisymmetric modal frequencies; the shear modulus G xz ( G yz ) only affects the antisymmetric modal frequencies; the elastic modulus E z can neither change the symmetric modal frequencies nor the antisymmetric modal frequencies.