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:
Dec. 29, 2020
Filed:
Mar. 01, 2017
Applicants:
Nr Electric Co., Ltd, Jiangsu, CN;
Nr Engineering Co., Ltd, Jiangsu, CN;
Inventors:
Shengfu Gao, Jiangsu, CN;
Taixun Fang, Jiangsu, CN;
Yongping Wang, Jiangsu, CN;
Xiang Zhang, Jiangsu, CN;
Weiming Pan, Jiangsu, CN;
Ming Yuan, Jiangsu, CN;
Guqing Zhou, Jiangsu, CN;
Assignees:
NR ELECTRIC CO., LTD, Jiangsu, CN;
NR ENGINEERING CO., LTD, Jiangsu, CN;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01R 31/08 (2020.01); H02M 7/757 (2006.01); H02M 1/32 (2007.01); H02J 13/00 (2006.01); H02M 1/088 (2006.01);
U.S. Cl.
CPC ...
G01R 31/08 (2013.01); H02J 13/00 (2013.01); H02M 1/32 (2013.01); H02M 7/7575 (2013.01); H02M 1/088 (2013.01); Y02E 60/00 (2013.01); Y04S 10/20 (2013.01);
Abstract
Within a predetermined time range, record time information of status indication signals fed back by thyristor control units (TCU) of a converter valve. Perform statistics and comparison of the pieces of time information using a bias statistics method. Mark a thyristor level whose bias exceeds a preset value. And determine a probability of failure in the thyristor according to the marking result.