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:
Mar. 24, 2009
Filed:
Dec. 29, 2006
Applicants:
Yoichi Kato, Hitachi, JP;
Satoshi Kitamura, Hitachi, JP;
Inventors:
Yoichi Kato, Hitachi, JP;
Satoshi Kitamura, Hitachi, JP;
Assignee:
Hitachi, Ltd., Tokyo, JP;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H02P 1/46 (2006.01);
U.S. Cl.
CPC ...
Abstract
A synchronous machine regulator is provided to simplify an adjustment work of current distribution to thyristors, the synchronous machine regulator having a circuit boardmounting a gate drive circuitfor supplying a gate pulse to each of thyristor bridges constituting a plurality of thyristor rectifiersconnected in parallel and supplying excitation current to a field windingof a synchronous machineand phase control meansfor controlling a phase angle of each gate pulse to be supplied to each thyristor, wherein the current distribution to thyristors is controlled by the phase control means