| 摘要 |
PURPOSE:To ensure a larger control margin and thus make possible stable rotation control by so constituting a stator that coils are wound around its magnetic pole teeth, extending inward or outward in the radial direction, and winding the coils by more turns on the rotor magnet side. CONSTITUTION:A stator is formed as a stator core 15 by laminating thin electromagnetic steel plates. The magnetic pole base 17, or the central portion, of the stator core 15 is formed into a ring shape, and magnetic pole teeth 16, radially extending from the magnetic pole base 17, are formed. Magnetic pole tooth ends, in a required shape, are formed on the periphery of the magnetic pole teeth 16. The number of turns of coils 14, wound around the magnetic pole teeth 16, is larger on the magnetic pole tooth end 18 side. This reduces the inductance component of the magnetic pole teeth themselves, comparing with cases where coils 14 are wound on the magnetic pole base 17 side or evenly wound around the magnetic pole teeth 16. The more the coils 14 are biased toward the magnetic pole base 17, the more inductance is reduced. |
