| http://www.w3.org/ns/prov#value | - ared with that using a cylindrical permanent magnet 23 of which outer periphery is magnetized as shown in FIG. 2, because it is difficult to form a number of poles having a desired magnetic force on the outer peripheral surface of the cylindrical permanent magnet 23. [0094] The number Zt of rotor pole teeth can be expressed by Zt=12n???3, where n is an integer and ???1.
|
