ELECTRIC TOOL AND CONTROL METHOD THEREFOR

Disclosed in the present application are an electric tool and a control method therefor. The electric tool comprises: a motor; an output member, driven by the motor so as to execute functions of the electric tool; a power supply apparatus, used for supplying power to the motor; and a driving circuit, electrically connected to the motor. A controller controls the motor to operate so as to drive the output member to work, and acquires motor parameters of the motor in real time; a flux linkage of the motor is estimated on the basis of the acquired motor parameters, and parameters related to the real-time temperature of the motor are estimated on the basis of the flux linkage, thereby controlling the operation of the electric tool according to the acquired parameters. The present application acquires the motor parameters of the motor during an operation process so as to estimate the flux linkage of the motor, and, on the basis of the flux linkage, estimates the parameters related to the motor temperature, so that