Design and Analysis of a New Equivalent Magnetic Network Model for IPM Machines

Abstract

This article proposes a new equivalent magnetic network (EMN) model for predicting the performances of interior permanent magnet (IPM) machines. The proposed EMN model incorporates the features of high accuracy and low time consumption in the reluctance network model and the magnetic equivalent circuit model, respectively, to achieve a tradeoff between the time consumption and calculation accuracy. A new air-gap model is also presented to make the dynamic analysis of the machine more efficient and easier. Moreover, the modeling approach of the rotor provides a standard for the modeling of IPM machines with permanent magnets (PMs) at different locations and of different shapes. In addition, the proposed EMN model takes into consideration the influence of flux leakage and iron saturation. Finally, the example machine is chosen, and the effectiveness of the EMN model is verified by comparison with the finite-element analysis and experimental tests.