H - Electricity – 02 – K
Patent
H - Electricity
02
K
310/57
H02K 37/00 (2006.01) H02K 1/14 (2006.01) H02K 21/14 (2006.01) H02K 37/14 (2006.01)
Patent
CA 1180043
ABSTRACT OF THE DISCLOSURE: The step-by-step motor is provided with a stator having an energizing coil for producing a magnetomotive force, and a rotor surrounded by the stator and having an axis about which it is rotatable. This rotor comprises along its circumferential periphery a succession of alternate magnetic dipoles to which is applied the magnetomotive force from the coil. The axis of the rotor passes through a bearing positionally fixed with respect to the stator. The stator of the step-by-step motor includes an inner cylindrical wall adapted for dividing the magnetomotive force of the coil applied to the rotor dipoles and comprising two end rings having polar teeth equal in number to the magnetic dipoles of the rotor, and at least an intermediate ring disposed between the two end rings and made of ferromagnetic material. This intermediate ring is secured to an inner wall of the coil and comprises two annular rows of polar teeth, the teeth of each row being angularly offset between the teeth in the other row. The number of teeth in each of these rows is equal to the number of the teeth of the end rings and to the number of the magnetic dipoles of the rotor.
375904
Crouzet
Robic Robic & Associes/associates
LandOfFree
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