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:
Nov. 06, 2018
Filed:
Feb. 18, 2015
Toshiba Mitsubishi-electric Industrial Systems Corporation, Chuo-ku, JP;
Shingo Kinoshita, Tokyo, JP;
Abstract
The present disclosure provides a power conversion apparatus and an initial charging method of the same to control a closing phase angle at the time of switching on a power source, to suppress an overvoltage of a DC voltage, and to prevent overcharge and breakage of parts caused by the overvoltage. A peak voltage value of an input voltage, a total secondary side converted winding resistance of a primary side and a secondary side of an input transformer, a total leakage inductance of the primary side and the secondary side of the input transformer, a capacitor, and a power source frequency are substituted in a mathematical expression, and a closing phase angle is varied at predetermined intervals to obtain first half-wave peak voltage values of the capacitor voltage at the closing phase angles to close a circuit breaker.