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. 01, 2018
Filed:
Apr. 03, 2014
Applicant:
Fanuc Corporation, Minamitsuru-gun, Yamanashi, JP;
Inventor:
Koujirou Sakai, Yamanashi, JP;
Assignee:
FANUC CORPORATION, Yamanashi, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01R 31/02 (2006.01); H02H 3/04 (2006.01); H02P 23/00 (2016.01); H02P 27/08 (2006.01); H02P 29/032 (2016.01);
U.S. Cl.
CPC ...
H02P 23/00 (2013.01); H02P 27/085 (2013.01); H02P 29/032 (2016.02);
Abstract
A power failure detection unit in an AC-DC converter device detects power failure of a 3-phase AC power supply at the time of driving a motor, and generates a power failure detection signal in accordance with detection of power failure. A transmitter unit in the AC-DC converter device transmits the power failure detection signal using a cable, radio, or an optical fiber. A receiver unit in a DC-AC converter device receives the power failure detection signal transmitted from the transmitter unit.