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:
Feb. 07, 2017
Filed:
May. 11, 2012
Applicants:
Hiroshi Ogino, Tokyo, JP;
Akinobu Ando, Tokyo, JP;
Yasuhiko Hosokawa, Tokyo, JP;
Inventors:
Assignee:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H02P 6/14 (2016.01); H02P 27/06 (2006.01); H02M 5/45 (2006.01); G01R 19/00 (2006.01); G01R 21/00 (2006.01); H02K 29/00 (2006.01); H02K 29/08 (2006.01); H02P 6/08 (2016.01); H02P 6/00 (2016.01); G01R 31/42 (2006.01);
U.S. Cl.
CPC ...
H02P 6/14 (2013.01); G01R 19/0084 (2013.01); G01R 21/00 (2013.01); H02M 5/45 (2013.01); H02M 5/4505 (2013.01); H02P 27/06 (2013.01); G01R 31/42 (2013.01); H02K 29/00 (2013.01); H02K 29/08 (2013.01); H02P 6/001 (2013.01); H02P 6/08 (2013.01);
Abstract
In a thyristor control device which converts a first AC voltage to a DC voltage and converts the DC voltage to a second AC voltage to be supplied to a synchronous motor, a DC voltage detector is configured to detect the DC voltage, and is provided with an AC voltage detector configured to detect the second AC voltage and an arithmetic circuit configured to determine the DC voltage on the basis of the second AC voltage detected by the AC voltage detector. As a result, there is no need to separately provide a DV voltage detector, which makes it possible to make the device compact in size and cheap in price.