| 摘要 |
PURPOSE:To miniaturize and lighten an electromagnetic apparatus by magnetizing a magnet, detachably mounting a member made of a magnetic material on the pole face side, incorporating the member and removing said member. CONSTITUTION:A plurality of radial grooves are processed to the upper end surface of a magnetized yoke 10, and windings 12 for excitation to which insulating coatings are executed are wound on the grooves. A ring-shaped magnet 5 is fixed to a back yoke 4, and pressed into an axle 3. The shaft 3 is fitted into a hole formed to the inner circumferential section of the magnetized yoke 10, and conducts centering on magnetization. Consequently, when the magnet 5 is magnetized, a plunger 14 set up to the magnetized yoke 10 is operated, an air gap is formed between the magnetized yoke 10 and the magnet 5, and a bus-yoke 20 consisting of a magnetic material is inserted. When the magnet 5 is incorporated into a motor, the axle 3 is inserted into a bearing under the state in which the sub-yoke 20 is held, and the sub-yoke 20 is removed. Accordingly, self-demagnetization on assembly can be inhibited.
|
