Microprocessor controlled single phase motor with external...

H - Electricity – 02 – P

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H02P 6/08 (2006.01) H02P 6/00 (2006.01) H02P 6/20 (2006.01)

Patent

CA 2329420

A motor powered by a dc power source has a stator having a single phase winding. A power switching circuit of the motor has power switches for selectively connecting the dc power source to the single phase winding. A permanent magnet rotor in magnetic coupling relation to the stator drives a fan. A position sensor on the stator detects the position of the rotor and provides a position signal indicating the detected position. A control circuit including a microprocessor responsive to the position signal and connected to the power switching circuit selectively commutates the power switches to commutate the single phase winding as a function of the position signal.

Un moteur alimenté en puissance par une source électrique cc comprend un stator à enroulement monophasé. Un circuit de commutation de puissance du moteur est doté de commutateurs de puissance qui couplent sélectivement la source électrique cc à l'enroulement monophasé. Un rotor à aimant permanent couplé par énergie magnétique au stator entraîne un ventilateur. Un détecteur de position situé sur le stator détecte la position du rotor et produit un signal de position indiquant la position détectée. Un circuit de commande comprenant un microprocesseur qui réagit au signal de position et qui est relié au circuit de commutation de puissance commute sélectivement les commutateurs de puissance pour inverser l'enroulement monophasé en fonction du signal de position.

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