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. 13, 2001
Filed:
Oct. 04, 2000
Applicant:
Inventors:
Assignee:
Kokusan Denki Co., Ltd., Shizouka-Ken, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H02M 5/458 ; H02H 7/122 ;
U.S. Cl.
CPC ...
H02M 5/458 ; H02H 7/122 ;
Abstract
A method of controlling an electric power supply apparatus with an electric converter circuit adapted to detect a phase difference between a waveform of a voltage across load connection terminals and a waveform of a reference voltage from time difference between zero cross points thereof and shift the phase of the reference voltage so that the phase difference is within a set range when it is decided that the phase difference is out of the set range whereby the phase of the output voltage across the load connection terminals is so controlled that it is coincident with that of an external voltage applied across the load connection terminals.