Transient simulation of the shaded pole motor based upon a multi-slice finite-element model

In this paper, a 2D multi-slice-time-stepping eddy current model of the shaded pole induction motor (SPIM) in which the governing equations include both field and circuit equations is presented. With this model, the skewed rotor conductors, the saturation of the permeable parts and the skin effect can all be taken into account. In order to simulate the continuous rotor motion of the SPIM, a hybrid moving method, which combines the moving band and sliding surface approaches is used. With this hybrid method, a high degree of accuracy in the field solution is achieved without a large number of slip nodes which will require excessively fine discretization. To verify the validity of the proposed model, the starting process of a SPIM is investigated with the new approach, and the computed results are compared with experimental results