Power tool

Abstract

A power tool includes a housing; a working head; an electric motor disposed in the housing and configured to drive the working head; a load detection unit configured to detect real-time load data of the power tool; and a controller electrically connected to at least the load detection unit. The controller is configured to acquire the real-time load data outputted by the load detection unit; generate an amplitude limiting parameter of a terminal voltage of the electric motor according to the real-time load data and a first load limit; and adjust the terminal voltage of the electric motor based on the amplitude limiting parameter of the terminal voltage of the electric motor. 20 25 21 72 69 12 A ug 2 02 5 A B S T R A C T 2 0 2 5 2 1 7 2 6 9 1 2 2 0 2 5 A u g 1 / 7 FIG. 1 FIG. 2 Controller Q1 Q3 Q5 Q4 Q6 Q2 13 15 11 U V WO 12 Parameter detection module 14 10 Acquire an actual bus current Determine an amplitude limiting parameter of a terminal voltage of an electric motor according to the actual bus current and a first current threshold so as to cause the actual bus current to approach the first current threshold Determine an amplitude limiting voltage of the terminal voltage of the electric motor according to the amplitude limiting parameter of the terminal voltage of the electric motor, where the amplitude limiting voltage of the terminal voltage of the electric motor is used for limiting the terminal voltage of the electric motor S110 S120 S130 1 / 7 10 13 15 12 Q1 Q3 Q5 U Vc W Q4 Q6 Q2 11 14 Parameter Controller detection module FIG. 1 S110 Acquire an actual bus current Determine an amplitude limiting parameter of a terminal voltage of an electric motor according to the actual bus S120 current and a first current threshold so as to cause the actual bus current to approach the first current threshold Determine an amplitude limiting voltage of the terminal voltage of the electric motor according to the amplitude limiting parameter of the terminal voltage of the electric S130motor, where the amplitude limiting voltage of the terminal voltage of the electric motor is used for limiting the terminal voltage of the electric motor FIG. 2 20 25 21 72 69 12 A ug 2 02 5 1 0 2 0 2 5 2 1 7 2 6 9 1 2 A u g 2 0 2 5 1 1 1 4 P a r a m e t e r d e t e c t i o n m o d u l e F I G . 1 S 1 1 0 F I G . 2

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