| 摘要 |
PURPOSE:To reliably detect the pole of a magnet by providing a magnetic member between a winding and a sensor. CONSTITUTION:A megnet 3 is stably disposed to form a plurality of poles in the circumferential direction of a shaft to form a rotor, and an air gap is formed on the outer periphery to dispose a stator 4. A bracket 6 holds the stator 4 and a bearing 8, and a bracket 7 holds the stator 4, a bearing 8 and a sensor 9. The bearings 8, 8 support a shaft 1. A ring-shaped magnetic member 10a is projected integrally from a bracket 10 in the state that the winding 5 provided on the stator 4 and the sensor 9 are partitioned therebetween. The leakage magnetic flux from the winding 5 is passed through the member 10a. |
