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:
Apr. 09, 2019
Filed:
Nov. 30, 2015
Meidensha Corporation, Tokyo, JP;
Takayuki Matsuo, Shizuoka, JP;
Kazunobu Oi, Shizuoka, JP;
MEIDENSHA CORPORATION, Tokyo, JP;
Abstract
To provide a dc interruption apparatus requiring no circuit for producing current zero point forcibly and having a simplified construction adequate for cost reduction, one end of a main contactfor each phase of a dc high speed vacuum circuit breakeris connected with a positive output end of a corresponding phase of a rectifierfor converting ac power to dc power with semiconductor devices arranged in a bridge. The other ends of the main contactsare connected together to form a positive side output line. A pulse-shaped current flows in an arm of each phase of the rectifierand the current is commutated among the arms sequentially, so that the current is reduced to zero after the commutation. Each of main contactsof dc high speed vacuum circuit breakerinterrupts the current reduced to zero by the commutation, so that the interruption is easier.