Electric power tool and motor control method thereof

Electric power tool and motor control method thereof

An electric power tool is provided with: a motor; a hydraulic pressure generator driven by the motor and configured to generate a plurality of impacts in one revolution thereof; an impact angle detector configured to detect an impact angle in one impact of the hydraulic pressure generator; an electr...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser: MORIMURA KOUICHIROU, AGEHARA KIGEN
Format: Patent
Sprache:eng
Schlagworte:
HAND TOOLS
MANIPULATORS
PERCUSSIVE TOOLS
PERFORMING OPERATIONS
PORTABLE POWER-DRIVEN TOOLS
TRANSPORTING
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Beschreibung
Zusammenfassung:An electric power tool is provided with: a motor; a hydraulic pressure generator driven by the motor and configured to generate a plurality of impacts in one revolution thereof; an impact angle detector configured to detect an impact angle in one impact of the hydraulic pressure generator; an electric current detector configured to detect an electric current applied to the motor; a determination unit configured to determine an impact failure based on the impact angle and the electric current detected by the impact angle detector and the electric current detector; and a rotation controller configured to decrease a rotation speed of the motor when the determination unit determines the impact failure.