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:
Dec. 18, 2007
Filed:
Oct. 24, 2006
Applicants:
Toshiyuki Fujii, Tokyo, JP;
Naoki Morishima, Tokyo, JP;
Inventors:
Toshiyuki Fujii, Tokyo, JP;
Naoki Morishima, Tokyo, JP;
Assignee:
Primary Examiner:
Int. Cl.
CPC ...
H02M 3/24 (2006.01); G05F 1/70 (2006.01);
U.S. Cl.
CPC ...
Abstract
This invention provides a power conversion circuit control apparatus which rapidly detects the voltage amplitude and phase of each phase, corrects the output of a current controller by the mean voltage amplitude and mean phase, and corrects, on the basis of the voltage amplitude and phase of each phase, a voltage amplitude command and voltage phase command to be applied to pulse width modulation. The apparatus can suppress an overcurrent even when the AC voltage is unbalanced, and restart the operation without generating any overcurrent when the circuit is to be reactivated.