CLAW POLE TYPE PM MOTOR AND ITS MANUFACTURING METHOD

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PROBLEM TO BE SOLVED : To provide a multi-phase claw pole type PM motor in which a rare-earth magnet is used, and which produces high output with a stator structure causing no magnetic saturation. SOLUTION : A soft magnetic steel plate excellent in magnetic characteristics is folded, laminated, annealed and molded to form a stator. A first stator and a second stator are punched out from the soft magnetic steel plate, and subjected to annealing in order to remove magnetic distortion due to processing after folding a claw magnetic pole portion 10. Moreover, the rare-earth magnet having high residual magnetic flux density, even if used, is laminated in order to secure the thickness required for a claw magnetic pole or the like so as to cause no magnetic saturation, and the stator is formed. Furthermore, in order to reduce the contact magnetic resistance of the respective components constituting a magnetic circuit as much as possible, a contact area is increased. Moreover, in order to improve productivity, a first stator iron core 9A and a second stator iron core 9B are molded to facilitate deformation and accuracy securement of the claw magnetic pole. COPYRIGHT : (C)2009, JPO&INPIT