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:
Jul. 19, 2005
Filed:
May. 31, 2002
Applicant:
Doug D. Deng, Canton, MI (US);
Inventor:
Doug D. Deng, Canton, MI (US);
Assignee:
Ballard Power Systems Corporation, Dearborn, MI (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H03K019/082 ;
U.S. Cl.
CPC ...
Abstract
A hybrid use of a phase-locked-loop controller and a microprocessor-based controller to synchronize the phase angles of a three-phase AC power source, such as a static power converter, with those of a three-phase power grid. The phase-angle synchronization may enable the AC power source to be safely connected to the power grid to provide additional power capacity.