Patent · US Active

Power tool

US11791756B2 · kind B2 · utility

1Cited by

3References

20Claims

0Family size

Assignee

Nanjing Chervon Industry Co., Ltd. · CN

Inventors

Yanqing Xu · Nanjing, CN
Dezhong Yang · Nanjing, CN
Hongwei Wang · Suzhou, CN

Key dates

Filing date	Sep 20, 2021
Grant date	Oct 17, 2023
Priority date	—
Expiry date	Dec 27, 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 motor, a power supply device, a driver circuit, a parameter acquisition module, and a controller. The motor includes a stator and a rotor. The motor is configured to generate a reluctance torque. The driver circuit is electrically connected to the motor to drive the motor. The parameter acquisition module is configured to acquire a current of the motor, a rotational speed of the motor, and a position of the rotor. The controller is configured to: according to at least one of the current of the motor, the rotational speed of the motor, or the position of the rotor, dynamically adjust a current applied to the stator so that an included angle between a stator flux linkage of the motor and a rotor flux linkage of the motor ranges from 90° to 135°.

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