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A saturation map for the non-uniform magnetic saturation of a V-shaped interior permanent magnet rotor is formulated in this paper. This saturation map is used in conjunction with the magnetic equivalent circuit theory to propose an analytical method for accurate computation of the airgap permanent magnet flux density for interior permanent magnet rotors. Unlike the conventional methods, the proposed...
PM-assisted claw-pole synchronous motor (CPSM) has commonly been used in a variety of industrial applications, thanks to its robust structure and high energy density. However, such motor has an axially asymmetric rotor configuration, which induces the corresponding 3-D magnetic field distribution. Thus, this paper develops an infinitesimal hexahedron-element-based 3-D equivalent magnetic circuit network...
In this study, we investigate the output maximization of salient-pole synchronous machines by using small amount of Nd-Fe-B magnets. First, the mechanism of output increase by the additional magnets is revealed by using both finite element method and simple magnetic circuit. Then, the appropriate magnet shape and rotor core design are discussed. The experimental verification is carried out by using...
Torque is produced in interior permanent magnet (IPM) machines as a result of stator current interactions with the rotor permanent magnets and rotor electromagnetic reluctance. Separation of the torque into its permanent magnet (PM) and reluctance components is helpful to machine designers but is complicated by the nonlinearity of magnetic saturation. This paper proposes a magnetic circuit model (MCM)...
A 3D magnetic equivalent circuit model is developed to predict the total excitation flux of an homopolar hybrid excitation synchronous machines. It is established using the main flux path and a part of the magnets leakage flux's path. This model takes into account the lamination effect and ferromagnetic parts reluctances. Results from the model are compared with finite-element predictions and the...
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