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:
Jul. 12, 2022
Filed:
Jun. 06, 2019
Applicant:
Nanjing Chervon Industry Co., Ltd., Nanjing, CN;
Inventors:
Hongwei Wang, Nanjing, CN;
Qian Xu, Nanjing, CN;
Weipeng Chen, Nanjing, CN;
Xiangqing Fu, Nanjing, CN;
Dongrong Qiu, Nanjing, CN;
Wencheng Li, Nanjing, CN;
Assignee:
Nanjing Chervon Industry Co., Ltd., Nanjing, CN;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H02P 6/08 (2016.01); H02P 29/40 (2016.01); H02P 29/50 (2016.01); B24B 23/02 (2006.01); H02P 6/14 (2016.01);
U.S. Cl.
CPC ...
H02P 29/40 (2016.02); B24B 23/028 (2013.01); H02P 29/50 (2016.02); H02P 6/14 (2013.01); Y02P 70/10 (2015.11);
Abstract
A power tool includes a brushless motor including several windings, a drive circuit for driving the brushless motor, a detection device for detecting the brushless motor so as to obtain a load parameter corresponding to a load of the brushless motor, and a controller for outputting a first control signal to reduce current of the brushless motor in a first slope when the load parameter exceeds a first preset range.