FE-Based Physical Model of LPMBDCM for Integrated Motor Drive System Analysis

This paper introduces an accurate phase variable model with detailed evaluation of the force ripple for the linear permanent magnet brushless DC motor (LPMBDCM) drive system analysis. The mover position dependent variables of the physical model are obtained from finite element (FE) solutions by the cubic spline interpolation. Considering the effect of the snubber circuits in the power electronic devices, a new M-file S-function based model is proposed, with which the LPMBDCM is directly implemented in Simulink using the state space equations. An integrated LPMBDCM drive system including DC power supply, inverter, LPMBDCM and commutation control is developed. Simulation results show that the FE-based phase variable model is an efficient method to establish an accurate and computationally fast model for the integrated LPMBDCM drive system analysis.