| 摘要 |
<p>PROBLEM TO BE SOLVED: To reduce the axial size for cost reduction by providing a magnetic pole part fitted to a first rotary member and facing a magnetic flux bypassing part through a second gap and another magnetic pole fitted to a second rotary member and facing an armature through a third gap, and supporting a magnetizing device with both the rotary members. SOLUTION: First and second cores 11, 12 formed by applying a reducing process to a magnetic material made steel plate are provided in a magnetizing device 10, and the core 11 is an annular member composed of a disc part 11a, a cylindrical magnetic pole part and a flange part 11c while the core 12 is an annular part composed of a disc part 12a facing the former 11a in the axial direction, a cylindrical part 12b fitted to an outer circumferential surface of the disc part 11a and a cylindrical magnetic pole 12c. The cores 11, 12 are fitted to a third bearing part 4e of a first rotary member 4 and a fifth bearing part 7c of a second rotary member 7 while they 11, 12 are supported therewith, and the magnetic pole part 11b is formed with a second annular gap between its inner peripheral surface and an outer peripheral surface of a rotor 6 while the magnetic pole part 12c is formed with a third annular gap between its inner peripheral surface and an outer peripheral surface of an armature 9. According to the constitution, a stable operation is maintaind for a long time along with reduction in cost and size.</p> |
