Nonlinear analysis of 2 phase hybrid stepping motor using 3D equivalent magnetic circuit network method

Abstract

Summary form only given. The hybrid stepping motor (HSM) has very small airgap length and small teeth in the stator and the rotor. So, these bring out the saturation in the teeth easily. Accordingly, the nonlinear characteristic in magnetic core of HSM should be considered in the design and magnetic analysis process. In general, the equivalent magnetic circuit method with lumped parameters has been widely applied to predict the performance of HSM. However, it is difficult to obtain clear equivalent circuit parameters of HSM other than that of other type motors because the main flux of HSM takes both radial and axial paths and HSM are designed to operate under highly saturated conditions. Moreover, the equivalent circuit method cannot show the distributive characteristic of the magnetic saturation of teeth. Therefore, 3D analysis such as finite element method which considers the distributive characteristics of HSM is inevitable for the accurate performance analysis. In this paper, the 3D equivalent magnetic circuit network method based on the trapezoidal element is used for the accurate and efficient analysis of HSM.