A Fast Numerical Method for Magnetic Field Analysis of Coaxial Magnetic Gears with Bridge-Connected Modulators Considering Magnetic Saturation

Abstract

This paper presents a novel approach for calculating the magnetic field distribution of magnetic gears(CMGs) with bridge connection in modulator. The modulator and bridge connection regions were divided into several unit modules to derive a convolution matrix of permeability. The magnetic field distribution was then calculated using spatial harmonic modeling method(SHMM). To accurately account for the influence of nonlinear permeability and saturation on the magnetic field distribution, the permeability curve of the material was incorporated, and the permeability distribution function was modified using an iterative method. To verify the method, the magnetic field distribution of two sets of magnetic gears with different bridge parameters was calculated. The proposed method for accurately calculating the magnetic field distribution of CMGs with bridge connections is validated by comparing it with the results obtained from finite element analysis(FEA).