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:
Jan. 11, 2011
Filed:
Aug. 22, 2007
Koichiro Nagata, Mito, JP;
Toshiaki Okuyama, Tokai, JP;
Shigetoshi Okamatsu, Hitachinaka, JP;
Koichi Miyazaki, Hitachi, JP;
Koichiro Nagata, Mito, JP;
Toshiaki Okuyama, Tokai, JP;
Shigetoshi Okamatsu, Hitachinaka, JP;
Koichi Miyazaki, Hitachi, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
An electric power converter apparatus having a function of converting a power source voltage into an AC voltage having an arbitrary frequency and maintaining an output voltage constant even on the power source variation, in which the electric power converter apparatus decreases the output voltage when the output voltage drops to equal to or less than a predetermined value, afterward, increases the output voltage in response to a predetermined rate of change when the power source voltage rises.