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:
May. 03, 1977
Filed:
Jul. 14, 1975
Kyozo Tachibana, Naka, JA;
Hitachi, Ltd., , JA;
Abstract
A controlled AC-to-DC converter comprising a transformer having at least three taps including a center tap and first and second taps, a first thyristor whose cathode is connected to said first tap of said transformer, a second thyristor whose cathode is connected to said second tap of said transformer, a diode whose cathode is connected to said center tap of said transformer, a first output terminal connected to said cathode of said diode, a second output terminal connected to anodes of said first thyristor, said second thyristor and said diode, a D.C. output being produced across said first and second output terminals, and a retardation coil incorporated between said center tap and an electrical juncture between said cathode of said diode and said first output. In such converter, high harmonic frequency components generated in the A.C. current on the power source side are reduced without the disadvantage of the lowering of the efficiency.