| 摘要 |
PROBLEM TO BE SOLVED: To raise a concentricity of a rotor side with a stator side or a brushless motor by providing a stator coil at the stator side of the motor and a rotor pole made of a permanent magnet at the rotor side, and forming the rotor pole by magnetizing it to a plastic magnet of a fan, thereby eliminating necessity of adhering the pole. SOLUTION: A fan 2a is a crossflow fan long in an axial direction, and formed of a plastic magnet. The plastic magnet is formed of magnet particles such as ferrite or the like and plastic of binder (e.g. nylon). The fan 2a has a cylindrical part 2d extended from a side plate 2c of a motor side to an outer periphery of the motor. Rotor poles 5a are formed at sites opposed to a rotor core of the motor on the part 2d. The poles 5a are magnetized in the case of molding the fan 2a. Thus, adherence of the poles 5a is not necessary. And, high concentricity of a rotor side with a stator side can be obtained. |
