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. 05, 1976
Filed:
Oct. 29, 1974
Applicant:
Inventors:
Assignee:
Mitsubishi Denki Kabushiki Kaisha, Tokyo, JA;
Primary Examiner:
Int. Cl.
CPC ...
H02M / ;
U.S. Cl.
CPC ...
321 / ; 321-2 ; 321 / ;
Abstract
An electrical valve circuit apparatus which comprises an electrical valve circuit comprising a plurality of main control electrical valves operationally connected between a main DC circuit system and a main AC circuit system, at least one pair of commutating arms composed of at least two main control electrical valves for sequentially commutating the current, at least one arm of the group of commutating arms is an auxiliary DC circuit system, and an auxiliary electrical valve apparatus and an auxiliary power source connected in series to the auxiliary DC circuit system.