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:
Sep. 24, 1991
Filed:
Jan. 07, 1991
Applicant:
Inventor:
Lennart Angquist, Enkoping, SE;
Assignee:
Asea Brown Boveri AB, Vasteras, SE;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G05F / ;
U.S. Cl.
CPC ...
323207 ; 323205 ; 363 71 ; 363 72 ; 307 82 ;
Abstract
A three-phase voltage stiff convertor (SR) has two six-pulse partial convertors (SR1, SR2). The alternating voltage terminals of the partial convertors are connected to a transformer (TR) with the aid of which the resultant alternating voltage of the converter is formed as the difference between the alternating voltages of the partial convertors. Each partial converter has a separate direct voltage source (C1, C2). The converter has control members (SD) which control the two partial convertors which a mutual phase displacement alternating between +150.degree. and -150.degree..