POWER TOOL WITH SENSORLESS MOTOR CONTROL

A power tool is provided including a housing, a brushless motor disposed within the housing, a power switch circuit that supplies power from a power source to the brushless motor, and a controller configured to apply a drive signal to the power switch circuit to control the supply of power to the br...

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Bibliographische Detailangaben
Hauptverfasser: YAJURVEDI, Girish, GOKDERE, Levent, RAMEZANI, Mehdi, VANKO, John Charles, GOTTESMAN, Tal, FORSTER, Michael K
Format: Patent
Sprache:eng ; fre ; ger
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Beschreibung
Zusammenfassung:A power tool is provided including a housing, a brushless motor disposed within the housing, a power switch circuit that supplies power from a power source to the brushless motor, and a controller configured to apply a drive signal to the power switch circuit to control the supply of power to the brushless motor. The controller is configured to receive at least one signal associated with a phase current of the motor, detect an angular position of the rotor based on the phase current of the motor within a variable speed range of zero to at least 15,000 rotations-per-minute (RPM), and control the drive signal based on the detected angular position of the rotor to electronically commutate the motor within a torque range of zero to at least 15 newton-meters (N.m.) and a power output of zero to at least 1500 watts.