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We are developing a new high performance traction motor for railway vehicle using interior permanent magnet synchronous motor (IPMSM) and expecting it can reduce energy consumption. To estimate the losses and energy consumption of IPMSM, a simple motor model is needed. In this paper, We propose a simple equivalent circuit and loss model for IPMSM, the constants of which can be obtained from several simple test results. The calculation results using them show that the total loss of the IPMSM becomes about 60% of that of the induction motor when used as a traction motor for a typical commuter train.

Energy Consumption Calculation of Permanent Magnet Synchronous Motor for Railway Vehicle Traction Using Equivalent Circuit