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:
Mar. 21, 2017
Filed:
Jan. 15, 2014
Applicant:
Mitsubishi Electric Corporation, Chiyoda-ku, Tokyo, JP;
Inventor:
Michihiro Takata, Chiyoda-Ku, JP;
Assignee:
Mitsubishi Electric Corporation, Tokyo, JP;
Attorneys:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H02J 4/00 (2006.01); G06F 1/28 (2006.01);
U.S. Cl.
CPC ...
H02J 4/00 (2013.01); G06F 1/28 (2013.01); Y10T 307/549 (2015.04);
Abstract
A first output voltage of a constant-voltage power supply is applied as a reference voltage of a multi-channel A-to-D converter and a monitor signal obtained by smoothing the first output voltage by a first power-supply filter is inputted as an input signal voltage. A micro-processor periodically writes digital conversion data of the monitor signal into shift registers to calculate a maximum deviation using a maximum value and a minimum value of the latest predetermined number of data, and determines a power-supply abnormality when the maximum deviation exceeds a predetermined threshold value.