Patent · US Active

Power tool using brushless motor and method for controlling the same

US11791750B2 · kind B2 · utility

0Cited by

4References

17Claims

0Family size

Assignee

Nanjing Chervon Industry Co., Ltd. · CN

Inventors

Zhen Xu · Changzhou City, CN
Junya Duan · Nanjing, CN
Jifeng Feng · Nanjing, CN

Key dates

Filing date	Dec 23, 2021
Grant date	Oct 17, 2023
Priority date	—
Expiry date	Dec 23, 2041

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY02P70/10
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

A power tool includes a housing, a brushless motor disposed inside the housing, and a controller. The controller is configured to receive power-off signals and power-on signals. Upon receiving a power-on signal, the controller is further configured to receive a time signal indicative of a time interval from the last power-off signal to the current power-on signal. The controller is further configured to determine whether the time interval is greater than or equal to a first time threshold and less than a second time threshold, and brake the motor before start-up if the time interval is greater than or equal to the first time threshold and less than the second time threshold.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.