Title:
SWITCHING NODE BASED SENSORLESS MOTOR CONTROL FOR PM MOTOR
Document Type and Number:
WIPO Patent Application WO2007103495
Kind Code:
B1
Abstract:
A circuit for indirectly measuring a sign of a current flowing in an inverter stage coupled to a phase of a motor or indirectly measuring the sign of the voltage induced by a counter Electromotive Force (EMF) in a coil of the phase of the motor, the inverter stage being connected between a power supply and the ground. The circuit includes a gate driver circuit coupled to the inverter stage for alternatively connecting the phase of the motor to the power supply and to ground, the gate driver circuit having a current sign detection circuit, wherein the current sign detection circuit senses the sign of the current flowing in the inverter stage, or the sign of the counter EMF for controlling the commutation of switches in the inverter stage.
Inventors:
GRASSO MASSIMO (IT)
FRANCESCO MERELLO ANDREA (IT)
LOCATELLI CHRISTIAN (IT)
FRANCESCO MERELLO ANDREA (IT)
LOCATELLI CHRISTIAN (IT)
Application Number:
PCT/US2007/005920
Publication Date:
June 12, 2008
Filing Date:
March 08, 2007
Export Citation:
Assignee:
INT RECTIFIER CORP (US)
GRASSO MASSIMO (IT)
FRANCESCO MERELLO ANDREA (IT)
LOCATELLI CHRISTIAN (IT)
GRASSO MASSIMO (IT)
FRANCESCO MERELLO ANDREA (IT)
LOCATELLI CHRISTIAN (IT)
International Classes:
G05F1/10
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