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:
Aug. 23, 2022
Filed:
Sep. 30, 2019
Applicant:
Fuji Electric Co., Ltd., Kanagawa, JP;
Inventors:
Qichen Wang, Hino, JP;
Nobuyuki Tawada, Yokkaichi, JP;
Assignee:
FUJI ELECTRIC CO., LTD., Kanagawa, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H02H 3/34 (2006.01); G01R 31/42 (2006.01); H02M 1/14 (2006.01); H02H 3/253 (2006.01);
U.S. Cl.
CPC ...
H02H 3/34 (2013.01); G01R 31/42 (2013.01); H02H 3/253 (2013.01); H02M 1/14 (2013.01);
Abstract
A conventional technique makes a configuration complicated. Provided is an apparatus including: a voltage measuring unit configured to measure each of instantaneous voltages of three-phase AC voltage; and a determination unit configured to determine a state of a power supply source of the three-phase AC voltage based on a result of comparison between a comparison target value corresponding to a sum of n-th powers (n is a positive even number) of the instantaneous voltages of the three-phase AC voltage and a reference value.