Greenberg Traurig, LLP
Electric tool and control method of electric tool
An electric tool includes a motor, a drive circuit, a power supply and a controller. The motor includes a rotor and first, second, and third phase windings. The drive circuit is electrically connected to the first, second, and third phase windings and drives the motor to output power. The power supply is electrically connected to the drive circuit and supplies power to the first, second, and third phase windings through the drive circuit. The controller is connected to the drive circuit and outputs a control signal to control the drive circuit. The controller controls the drive circuit according to a rotation position of the rotor when a voltage of the power supply is less than or equal to a preset voltage threshold so that the first, second, and third phase windings are simultaneously connected to the power supply.
Nanjing Chervon Industry Co., Ltd.
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H02K B23B H02P B23B H02K B25F H02P B24B B25B H02P B25B
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Qian Wencheng Hongwei
Xu Li Wang