| 摘要 |
PURPOSE:To eliminate the influence of heats generated from the armature winding and the commutator of a motor to an inner field sensor by connecting the commutator with the end of a load side winding of an armature and providing a cooling fan adjacent to the end of an opposite load side winding. CONSTITUTION:An inner field sensor rotary unit 11 and an inner field sensor stationary unit 12 are provided at the opposite load side of an armature 3, and a commutator 4 is provided at the load side of the armature 3. Further, a cooling fan 6 is provided adjacent to the opposite load side winding end of the armature 3. When the commutator 4 is energized from a brush 10 to the winding of the armature 3, the armature 3 is rotated by the electromagnetic action of the magnetic flux of a field magnet 1. Simultaneously, a shaft 5, to the which armature 3 is secured, is rotated to drive a load coupled with a motor. Further, a cooling fan 5 secured to the shaft 5 and an inner field sensor rotary unit 12 are rotated, and a rotary position signal and a rotating speed signal are outputted from an inner field sensor stationary unit 10. |
