ELECTRIC TOOL
Number of patents in Portfolio can not be more than 2000
United States of America
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Issued Date -
Apr 22, 2021
app pub date -
Mar 30, 2018
filing date -
Mar 30, 2018
priority date (Note) -
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Abstract
Provided is an electric tool capable of continuing work by making the electrical advance angle of a brushless motor changeable even when a load is heavy. The electric tool is provided with: a brushless motor; a controller for controlling the drive of the brushless motor; and an inverter circuit supplied with a pulsation voltage obtained by rectifying an AC power supply input in a full-wave manner and electrifying the brushless motor 1 according to a control signal of the controller. The controller can change the electrical advance angle of the brushless motor. The controller detects the motor current flowing through the brushless motor and increases the electrical advance angle when the motor current reaches a predetermined threshold value.
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