ALEXANDRIA, Va., Sept. 30 -- United States Patent no. 12,427,631, issued on Sept. 30, was assigned to Nanjing Chervon Industry Co. Ltd. (Nanjing, China).
"Power tool and control method therefor" was invented by Hong Zhu (Nanjing, China) and Zhijian Lu (Nanjing, China).
According to the abstract* released by the U.S. Patent & Trademark Office: "A power tool includes a motor including a rotor and multi-phase stator windings; a driver circuit having multiple switch elements for outputting switch signals to drive the motor to rotate; and a controller electrically connected to at least the driver circuit and the motor. The controller is configured to acquire rotor position information of the motor and adjust a resultant magnetic potential of t...