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, 2023
Filed:
Jul. 31, 2019
State Grid Jiangsu Electric Power Co., Ltd. Research Institute, Jiangsu, CN;
Jiangsu Electric Power Research Institute Corporation Limited, Jiangsu, CN;
State Grid Jiangsu Electric Power Co., Ltd., Jiangsu, CN;
Nanjing Dnn Technology Co., Ltd, Jiangsu, CN;
Fengbo Tao, Jiangsu, CN;
Jiansheng Li, Jiangsu, CN;
Chao Wei, Jiangsu, CN;
Yang Liu, Jiangsu, CN;
Xu Wei, Jiangsu, CN;
Yuncai Lu, Jiangsu, CN;
Shu Chen, Jiangsu, CN;
Hairong Wei, Jiangsu, CN;
Yiming Wu, Jiangsu, CN;
Xiaoping Yang, Jiangsu, CN;
Jieqing Deng, Jiangsu, CN;
Peng Wu, Tiangsu, CN;
Tianxi Xie, Tiangsu, CN;
Shengquan Wang, Tiangsu, CN;
Caibo Liao, Jiangsu, CN;
Ruibin Li, Jiangsu, CN;
State Grid Jiangsu Electric Power Co., Ltd. Research Institute, Jiangsu, CN;
Jiangsu Electric Power Research Institute Corporation Limited, Jiangsu, CN;
State Grid Jiangsu Electric Power Co., Ltd., Jiangsu, CN;
Nanjing DNN Technology Co., LTD, Jiangsu, CN;
Abstract
The present invention discloses a device for evaluating and demagnetizing residual magnetism quantity of a power transformer. A main circuit comprises a switching power supply the two ends of which are respectively connected with a filter capacitor and a resistor in parallel. A forward end of the switching power supply is connected with a main switch in series. A rear end of the main switch is connected with a series branch of a sixth switch and a first resistor, a series branch of a first switch and a second switch, and a series branch of a third switch and a fourth switch are connected in parallel. A driving circuit is respectively connected with driving ends of the main switch, the sixth, first, second, third and fourth switches. A control circuit is connected with the driving circuit for sending an instruction to the driving circuit.