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:
Aug. 04, 2026
Filed:
Oct. 18, 2023
Nanjing Chervon Industry Co., Ltd., Nanjing, CN;
Hong Zhu, Nanjing, CN;
Pengchen Wang, Nanjing, CN;
Nanjing Chervon Industry Co., Ltd., Nanjing, CN;
Abstract
A power tool includes a housing, an electric motor, a driver circuit, a control module, and a current detection module. The control module is configured to: acquire a phase current value of the electric motor in real time within periodic time intervals; and turn off an on-state electronic switch within remaining time of a present time interval when the acquired phase current value exceeds a preset current threshold, and turn on an electronic switch which is controlled by the control module at present to be on when a present period of the drive signal ends, where the duration of each time interval among the periodic time intervals is the same as a period corresponding to the drive signal at present, and a period of the drive signal varies randomly within a second preset period range.