Modeling and Analysis of Hybrid Excitation Motor with Improved Air-Gap Permeance Calculation
The piecewise modeling of the air-gap permeance in equivalent magnetic circuit(EMC)model is complicated and easy to introduce errors.To solve the problem,the slot leakage magnetic circuit was concentrated in the air gap.By calculating the spatial distribu-tion of the equivalent air gap length,the calculation of the air-gap permeance was transformed into the integral related to the equivalent air gap length.In addition,by analyzing the mechanism of the saturation phenomenon of hybrid switch flux permanent magnet(HESFPM)mo-tor,and adopting the method of molecular region modeling,an EMC model considering slot flux leakage,interelectrode flux leakage of per-manent magnet and inhomogeneous saturation of magnetic bridge was proposed.Taking a HESFPM motor with 12 slots and 10 poles as an example,the proposed EMC model was analyzed and compared with the finite element analysis(FEA)method and experimental results.The results show that the calculation time of the proposed EMC model is only 0.12%of that of FEA simulation under the premise of ensu-ring the calculation accuracy of the electromagnetic performance of the motor,which greatly improves the calculation speed.
permanent magnet machineequivalent magnetic circuit modelfinite element simulationair-gap permeancemodeling and simulation
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维普
