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. 28, 2026
Filed:
Aug. 29, 2025
Nanjing Chervon Industry Co., Ltd., Nanjing, CN;
Nanjing Chervon Industry Co., Ltd., Nanjing, CN;
Abstract
A power tool includes a housing, an electric motor, a power supply device, a driver circuit, a controller, a first capacitor, and a voltage collection device. The power supply device is used for outputting a power signal to the driver circuit; and the driver circuit is used for outputting a drive signal to the electric motor according to the power signal and a control signal provided by the controller. The first capacitor is connected in parallel between the power supply device and the driver circuit. The voltage collection device is used for collecting a bus voltage signal at the front end of the driver circuit and transmitting the bus voltage signal to the controller. The controller can control the duty cycle of the control signal to decrease when the amplitude of the bus voltage is greater than a preset amplitude.