The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 16, 2017
Filed:
Jul. 28, 2011
Tatsuya Fukase, Chiyoda-ku, JP;
Hitoshi Isoda, Chiyoda-ku, JP;
Naohide Maeda, Chiyoda-ku, JP;
Masahiko Fujita, Chiyoda-ku, JP;
Dai Nakajima, Chiyoda-ku, JP;
Tatsuya Fukase, Chiyoda-ku, JP;
Hitoshi Isoda, Chiyoda-ku, JP;
Naohide Maeda, Chiyoda-ku, JP;
Masahiko Fujita, Chiyoda-ku, JP;
Dai Nakajima, Chiyoda-ku, JP;
Mitsubishi Electric Corporation, Tokyo, JP;
Abstract
To obtain a rotating electrical machine preventing a functional failure and shortening of the life of brushes caused by a temperature rise of the brushes installed to a vehicle AC power generator or a motor generator. A brush holder holding brushes supplying a field current to a rotor is provided with brush temperature suppressing metal members installed substantially parallel to the brushes in the vicinity of abutment portions of the brushes and slip rings in point-, line-, or surface-contact with the brushes at least at one point besides energization terminals. The brush temperature suppressing metal members not only diffuse heat generated at the brushes, but also function as a heat capacity for a case where a large amount of heat is generated in a short time, such as during regenerative power generation and a start-up operation, and thereby prevent an excessive temperature rise of the brushes.