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. 22, 2022
Filed:
Sep. 09, 2020
Applicant:
Nanjing Chervon Industry Co., Ltd., Nanjing, CN;
Inventors:
Yanqing Xu, Nanjing, CN;
Hongwei Wang, Nanjing, CN;
Xiaogang Ding, Nanjing, CN;
Tiantian Yin, Nanjing, CN;
Dezhong Yang, Nanjing, CN;
Xiubo Dai, Nanjing, CN;
Wenqi Zhen, Nanjing, CN;
Assignee:
Nanjing Chervon Industry Co., Ltd., Nanjing, CN;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H02P 21/10 (2016.01); H02P 21/18 (2016.01); H02P 21/22 (2016.01); B25F 5/02 (2006.01); H02P 27/12 (2006.01);
U.S. Cl.
CPC ...
H02P 21/10 (2013.01); B25F 5/02 (2013.01); H02P 21/18 (2016.02); H02P 21/22 (2016.02); H02P 27/12 (2013.01);
Abstract
A controller of a power tool is configured to, based on a sampled current of a motor of the power tool, output control signals that change with a change of a position of a rotor of the motor to control a drive circuit of the power tool such that an input voltage and/or a current of the motor changes approximately in a sine wave.