Abstract：The paper presents an analytical solution for computation the no-load magnetic field in surface-mounted permanent-magnet machines with anti-rotation dual rotors. The model is based on 2 dimensional polar coordinates and accounts for the influence of radial/parallel magnetization, internal/external rotor topologies. In order to accurately calculate the magnetic field and cogging torque, unlike previous introduced a relative permeance function or complex conformal transformation, the boundary conditions are used to consider the stator slotting effect. The scalar potential is governed by Laplace equation in the airgap and the slots on the stator, and by Poisson equation in the permanent magnet regions with constant relative recoil permeability of the magnets. The radial and tangential flux densities are obtained by using the Fourier’s series and separation of variables. The magnetic field change of notch region is acquired by rotor rotation, while the cogging torque and EMF of dual-rotors machine are estimated. The analytical results are in very good agreement with those obtained by the FEA, and confirm the accuracy of the analytical method.
张凤阁, 陈进华, 刘光伟, 张武. 面贴式异向旋转双转子永磁电机的磁场解析计算[J]. 电工技术学报, 2011, 26(12): 28-36.
Zhang Fengge, Chen Jinhua, Liu Guangwei, Zhang Wu. Analytical Solution of Magnetic Field for Surface-Mounted Permanent Magnet Machines with Anti-Rotation Dual Rotors. Transactions of China Electrotechnical Society, 2011, 26(12): 28-36.
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2011, Vol. 26 
