{"id":199,"date":"2022-09-24T13:04:13","date_gmt":"2022-09-24T04:04:13","guid":{"rendered":"https:\/\/www.ssil.co.jp\/product\/EMSolution\/en2\/?post_type=case&p=199"},"modified":"2022-09-24T21:08:10","modified_gmt":"2022-09-24T12:08:10","slug":"pmmotor3d","status":"publish","type":"case","link":"https:\/\/www.ssil.co.jp\/product\/EMSolution\/en\/case\/pmmotor3d\/","title":{"rendered":"Three-Dimensional Cogging Torque Analysis for Permanent Magnet Motors"},"content":{"rendered":"

Summary<\/h3>\n

Here we analyze the cogging torque of a permanent magnet motor in three dimensions to investigate the effect of the coil end. <\/p>\n

Explanation<\/h3>\n

This analysis can be performed in the same way as the two-dimensional calculation ("Two-Dimensional Cogging Torque Analysis for Permanent Magnet Motors"<\/font><\/a>), using the data pre_geom2D and rotor_mesh2D used for the two-dimensional analysis, extended in the z-direction with 2D_to_3D. The file input is almost the same as in the two-dimensional case, but the z-directional extension must be specified by 2D_to_3D. Fig. 1 shows the variation of the magnetic field intensity distribution with angle, which is not so different from the two-dimensional case, and the three-dimensional effect is considered to be small. Between the rotor and stator, the magnetic field intensity is slightly smaller at the coil ends. Fig. 2 shows the angular dependence of torque as well as the two-dimensional case. It can be seen that the torque is slightly smaller due to the end effect. This is closer to the actual measured value. <\/p>\n

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Fig.1 Variation of magnetic field strength distribution<\/p>\n<\/p><\/div>\n

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Fig.2 Angular dependence of torque
(Comparison between 2-D and 3-D)<\/p>\n<\/p><\/div>\n<\/div>\n

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Download<\/h3>\n

Analysis Model<\/h4>\n