| 摘要 |
PURPOSE:To remove the unevenness of rotation, by arranging a plurality of sheet coil layer-built units getting out of position by specified phase, on a circular yoke. CONSTITUTION:Three sheet coil layer-built units C of coil elements connected in series, getting out of position by specified phase, are arranged on the same surface, namely, on a steel plate yoke 11. By this method, distances between a magnet M and each sheet coil layer-built unit C are equal to one another, and the values on the magnetic flux density Bg contributing to each sheet coil layer-built unit C and uniform together. Accordingly, respective torque generated by each sheet coil layer-built unit C is equal to one another, and the unevenness of rotation is not generated. |
