Electric motor with external rotor

Details Electric motor with external rotor Electric motor with external rotor

H - Electricity

02

K

H02K 1/18 (2006.01) G01P 3/486 (2006.01) H02K 1/14 (2006.01) H02K 1/27 (2006.01) H02K 7/10 (2006.01) H02K 15/02 (2006.01) H02K 21/20 (2006.01) H02K 21/22 (2006.01) H02K 29/10 (2006.01)

Patent

CA 2493381

An electric motor comprises a shaft to which a stator is fixedly mounted and a rotor is rotatably mounted. The shaft is stiffened by a plurality of plates mounted to the shaft and held in compression thereon. The position of the rotor relative to the shaft and the speed of rotation of the rotor relative to the shaft are determined by a highly accurate opto-reflective sensor assembly. The shaft is mounted to a structural support by way of a mounting block that dampens virtually all vibrations generated by the motor for quiet operation. A rotor extension provides adaptability for operation with wider belts e. g. a treadmill.

L'invention concerne un moteur électrique comprenant un arbre sur lequel un stator est monté fixe et un rotor monté rotatif. L'arbre est renforcé par une pluralité de plaques montées sur l'arbre et retenues en compression sur celui-ci. La position du rotor par rapport à l'arbre et la vitesse de rotation du rotor par rapport à l'arbre sont déterminées au moyen d'un ensemble capteur optique à réflexion de haute précision. L'arbre est monté sur un support structural au moyen d'un bloc de montage qui amortit pratiquement toutes les vibrations produites par le moteur en vue d'un fonctionnement silencieux. Une extension du rotor permet une adaptation à des courroies plus larges, notamment lors d'une utilisation dans un tapis roulant.

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