This paper proposes a new modeling approach for circuit-filed-coupled time-stepping electromagnetic analysis of a saturated interior permanent magnet synchronous motor (IPMSM). To predict the drive performance quickly, the proposed approach consists of a dynamic simulator based on a new analytical model of the d, q-axes magnetization characteristics (λ-id-iq-θ). The model can take into account not only the cross-saturation but also the harmonics of inductance distributions and EMF waveforms. The validity of the model is verified from suitable simulation results of the instantaneous current and torque waveforms of the IPMSM. The proposed analysis has realized a dramatic reduction in the computation time compared to circuit-field-coupled time-stepping FEA, keeping analytical accuracy. The effectiveness of the proposed method is experimentally verified using 10kW-15000r/min concentrated-winding IPM motor.
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