Title:
MOTOR AND ITS MANUFACTURE
Document Type and Number:
Japanese Patent JP3444437
Kind Code:
B2
Abstract:
PURPOSE: To provide a motor and its manufacturing method by which pole parts and non-pole parts are combined satisfactorily while an air gap between the pole parts of a stator core and a rotor core is reduced to increase a torque and, further, a sliding resistance at the time of rotation is reduced.
CONSTITUTION: The inner circumferential surface of a stator core 4 and the outer circumferential surface of a rotor core 7a slide relatively on each other. The non-pole parts 42 and 72 of the stator core 4 and the rotor core 7a are formed integrally with the pole parts 41 and 71 of the stator core 4 and the rotor core 7a form the same material as the pole parts 41 and 71 except the nonmagnetic crystalline structure. As the non-pole parts 42 and 72 have the same thermal expansion coefficient as the pole parts 41 and 71 and are formed integrally with the pole parts 41 and 71, a high strength can be obtained. Further, as the relative sliding surfaces of the stator core 4 and the rotor core 7a are completely cylindrical, excellent results such that a sliding resistance can be reduced substantially, the manufacturing process can be simplified and an air gap can be reduced to increase a torque can be obtained.
Inventors:
Jiro Asai
Application Number:
JP7215994A
Publication Date:
September 08, 2003
Filing Date:
April 11, 1994
Export Citation:
Assignee:
株式会社デンソー
International Classes:
H02K37/04; H02K1/02; (IPC1-7): H02K37/04; H02K1/02
Domestic Patent References:
| JP61109435A | ||||
| JP684629A | ||||
| JP6323555A | ||||
| JP3293957A | ||||
| JP55166475A | ||||
| JP6245470A | ||||
| JP715929A | ||||
| JP7241062A | ||||
| JP546185B2 | ||||
| JP145256Y2 |
Attorney, Agent or Firm:
Hiroshi Ohkawa