Electronically communated motor control

Details Electronically communated motor control Electronically communated motor control

H - Electricity

02

P

H02P 6/08 (2006.01) H02P 6/18 (2006.01) H02P 27/08 (2006.01) H02P 5/41 (1995.01)

Patent

CA 2160170

A method and apparatus for controlling the speed of a multi-phase, brushless DC electrically commutated motor (ECM). Voltage is commutated to the windings of the ECM based on rotor position information derived from back EMF or Hall effect sensors. The application of the commutating voltages is arranged such that the voltage applied to the windings always leads the back EMF generated in the windings by aselected constant lead angle. The speed of the motor is then controlled by pulse width modulating (PWM) the voltage applied to the windings of the ECM.

Cette invention concerne une méthode et un dispositif de régulation de la vitesse d'un moteur CC polyphasé sans balai à commutation électrique. La tension est appliquée aux enroulements du moteur en fonction des données de position du rotor obtenues de capteurs de force contre-électromotrice ou à effet Hall. Les tensions de commutation sont appliquées aux enroulements de façon qu'elles précèdent toujours d'une valeur angulaire choisie la force contre-électromotrice générée dans lesdits enroulements. La vitesse du moteur est alors déterminée en modulant la durée des impulsions de tension appliquées aux enroulements.

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