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. 24, 1978
Filed:
Feb. 11, 1976
Kyozo Tachibana, Ibaraki, JP;
Takashi Tsuboi, Katsuta, JP;
Yutaka Suzuki, Hitachi, JP;
Mitsugu Matsutake, Hitachi, JP;
Shozuchi Miura, Hitachi, JP;
Shigeru Hatano, Hitachi, JP;
Takao Goto, Katsuta, JP;
Yoshio Nozaki, Katsuta, JP;
Hitachi, Ltd., , JP;
Abstract
This invention is applied to a power converter with a converting apparatus comprising one or more units including only controlled rectifiers or combination of controlled rectifiers and non-controlled rectifiers, said converting apparatus being connected with an AC power source, whereby high harmonic currents generated in the AC circuit during commutating periods are reduced. In the present invention, at the commutating period of the converting apparatus, the reactance in the AC circuit of the converter is changed to increase in accordance with change of the AC current of the converting apparatus, so that the change of the AC current during the commutating period is made more slowly thereby reducing high harmonic currents.