Method for controlling a rotational speed of an electric tool and electric tool
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United States of America Patent
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Aug 13, 2024
Grant Date -
Oct 7, 2021
app pub date -
Mar 16, 2021
filing date -
Apr 7, 2020
priority date (Note) -
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Abstract
A method for controlling a rotational speed of an electric tool includes starting a motor and controlling the motor to operate at a constant speed which is a preset rotational speed in response to determining that a motor of the electric tool is in a preset low-speed mode, increasing output torque until the motor runs in response to a rotor of the motor being locked, and controlling, based on a relationship between a current rotational speed of the motor and the preset rotational speed, the motor to operate at a constant speed. In this manner, the problem where a rotor is easily locked when the electric tool runs in a low-speed mode in the related art is solved and the electric tool can adaptively adjust an output rotational speed of the motor according to the load condition.
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