Abstract This paper presents a new spatial magnetic field (MF) analysis method of cylindrical stator coil. In the double polyhedral structure reaction sphere (RS), air-cored stator coils formed into a cylindrical shape are distributed on the surface of the stator shell in accordance with a certain rule. First, the energized coil is equivalent to a cylindrical permanent magnet, the conical permanent magnet model is obtained using the size equivalent, and the relationship between the coil current and the residual magnetization of the PM is obtained. Then, the spherical harmonics description of the air gap magnetic field is obtained by solving the Laplace equation with the air gap scalar magnetic field. Finally, by analyzing the finite element simulation results and experimental results, it can be seen that the radial magnetic density analytical expression has a good accuracy in fitting the stator MF.
Li Bin,Zhang Shuo,Li Guidan等. Stator Magnetic Field Analysis of Reaction Sphere Based on Spherical Harmonics[J]. Transactions of China Electrotechnical Society, 2018, 33(23): 5442-5448.
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2018, Vol. 33 
