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:
Apr. 21, 2026
Filed:
Nov. 29, 2023
Jiangsu Dongcheng Tools Technology Co., Ltd., Nantong, CN;
Haodong Wang, Nantong, CN;
Jianan Huang, Nantong, CN;
JIANGSU DONGCHENG TOOLS TECHNOLOGY CO., LTD., Nantong, CN;
Abstract
Disclosed are a motor control circuit and a control method. The control circuit includes: a power supply; a drive circuit; a pulse width modulation (PWM) signal generation circuit; a controller; and a reverse electromotive force detection circuit. The power supply is connected to the motor through the drive circuit; the drive circuit is connected to the controller through the PWM signal generation circuit; the controller is configured to control the drive circuit by changing a PWM signal frequency; the controller is connected to the motor through the reverse electromotive force detection circuit to obtain a reverse electromotive force parameter; the controller stores a correspondence between the reverse electromotive force parameter and the PWM signal frequency; the controller is further configured to receive the reverse electromotive force parameter and send the PWM signal frequency corresponding to the reverse electromotive force parameter to the drive circuit, for driving the motor.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile