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:
Nov. 18, 2008
Filed:
Feb. 17, 2006
Tatsumi Yamauchi, Hitachiota, JP;
Shinji Shirakawa, Hitachi, JP;
Masahiro Iwamura, Hitachi, JP;
Masamitsu Inaba, Hitachi, JP;
Keiichi Mashino, Hitachinaka, JP;
Keiji Kunii, Hitachiota, JP;
Tatsumi Yamauchi, Hitachiota, JP;
Shinji Shirakawa, Hitachi, JP;
Masahiro Iwamura, Hitachi, JP;
Masamitsu Inaba, Hitachi, JP;
Keiichi Mashino, Hitachinaka, JP;
Keiji Kunii, Hitachiota, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
A generator having a field coil L, and an SWcontrol circuitfor controlling field current flowing through the field coil L. When a generating operation of the generator is to be ended, a switchSWis turned off to interrupt the field current flowing through the field coil L, and a switchSWis turned off to allow the field current remaining the field coil L to the current path including a resistance elementwith a resistance element capable of quickly attenuating the field current.