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. 05, 2015
Filed:
Aug. 15, 2013
Mitsubishi Electric Corporation, Chiyoda-ku, Tokyo, JP;
Mitsubishi Electric Corporation, Tokyo, JP;
Abstract
The size of a reactor is reduced in a power supply device whose load circuit includes a second DC power supply. A power supply device includes: a chopper circuit CH connected between a first DC power supply Eand load circuit L; and a filter circuit FI that includes a filter coil Land filter capacitor C and is interposed between the first DC power supply Eand chopper circuit CH or between the second DC power supply Eand chopper circuit CH; wherein the DC-current-inductance characteristic curve of the filter coil Land DC-current-inductance characteristic curve of the reactor Lintersect each other, and the inductance value of the reactor Lis made larger than that of the filter coil Lin the region of current lower than a current value at the intersecting point.