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:
Oct. 30, 1984
Filed:
Dec. 14, 1982
Applicant:
Inventors:
Nobuyoshi Muto, Hitachi, JP;
Keijiro Sakai, Hitachi, JP;
Yasuo Matsuda, Hitachi, JP;
Kenji Nandoh, Funabashi, JP;
Assignee:
Hitachi, Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H02M / ;
U.S. Cl.
CPC ...
363 41 ; 318802 ; 318811 ;
Abstract
A pulse width modulation inverter is controlled by the use of the fundamental wave voltage E.sub.1 of the inverter output as a feedback quantity, the fundamental wave voltage E.sub.1 being obtained as the product of a function g(K.sub.H) which is determined by the amplitude ratio K.sub.H of a carrier wave and a modulated wave, and a d.c. voltage E.sub.D input of the inverter.