Patent ID: 7839042
Filing Date: 2010-11-23
Classification: H02K,Y10T

Abstract:
1. An inductor motor comprising: a stator having a plurality of stator teeth standing along substantially the same circumference from a substantially flat plate-shaped holding plate portion; a stator block including a pair of stators placed to face each other so that the stator teeth circumferentially alternately interdigitate with each other; a substantially cylindrical excitation coil placed around the stator block; a rotor including two substantially columnar magnet rotors coaxially arranged, each magnet rotor including a magnet portion in which a magnetized surface having north (N) poles and south (S) poles circumferentially alternately arranged thereon is provided on an outer peripheral surface; and a motor case that houses the stator block around which the excitation coil is placed, the two magnet rotors being placed inside the two stator blocks coaxially arranged respectively, characterized in that each of the stators is formed of a substantially flat plate-shaped preformed member of a magnetic material having a plurality of protruding pieces circumferentially formed and protruding radially outwardly, and has the stator teeth formed by bending the protruding pieces to stand up, and the rotor has an intermediate circumferential groove with a smaller diameter than the magnet portion between the two magnet rotors coaxially arranged, and the holding plate portion of the stator placed on an axially intermediate side of the inductor motor is placed around the intermediate circumferential groove.