Abstract: In an electric motor including a stator core having a plurality of layered steel thin plates, the rigidity of the stator core is maintained and the vibration during its operation is suppressed. Namely, at least parts of the thin plates of the stator core are adhered to each other by a varnish that is an insulating adhesive.
Type:
Grant
Filed:
April 16, 2003
Date of Patent:
April 18, 2006
Assignee:
Daikin Industries, Ltd.
Inventors:
Kazuo Ida, Ryuichiro Amano, Hiroaki Kojima
Abstract: A motor includes a stator formed by assembling plural divided-stator-members—each one of the members having a tooth—into an annular shape, and a rotor facing the stator. The divided stator members are formed by laminating plural core sheets and bonding at least parts of end faces along the laminating direction of the core sheets. This structure allows forming a lamination of the core sheets without welding, which avoids damaging electrical insulation between each core sheet. Eddy current thus does not increase at an inner rim of the stator, where magnetic flux intensely changes. The motor efficiency is, therefore, not adversely affected. As a result, a small, efficient and high performance motor in a simple structure is obtainable. A compressor employing the same motor and enjoying the advantages of the motor is also obtainable.
Type:
Grant
Filed:
March 4, 2002
Date of Patent:
April 11, 2006
Assignee:
Matsushita Electric Industrial Co., Ltd.