Low noise gear motor with dissymetric electric motor
AssigneeMoving Magnet Technologies
InventorsDamien Laforge, Lionel Billet
Life of this patent
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Abstract
A gear motor comprising a reduction gear train and a three-phase electric motor comprising a stator formed of a stack of sheets and 3*k electric coils and a rotor having 5 k*N pairs of magnetized poles, with k=1 or 2, the stator having two separate angular sectors alpha 1 and alpha 2, which are centered on the center of rotation of the motor and comprise an alternation of notches and 3*k*N teeth, which are regularly spaced and converge toward the center of rotation and define a cavity in which the rotor is arranged, the gear motor being characterized in that N=4 and in that alpha 1 is less than or equal to 180° and comprises all of the coils of the motor.
Claims16
A gear motor, comprising:
- a reduction gear train;
- and
- a three-phase electric motor comprising a rotor and a stator, the stator formed by a stack of sheets and a number of electric coils that is a multiple of 3 and a rotor having k*N pairs of magnetized poles, with k=1 or 2, the stator having two separate angular sectors alpha 1 and alpha 2, which are centered on the center of rotation of the motor and comprise an alternation of notches and 3*k*N teeth, which are regularly spaced and converge toward the center of rotation and define a cavity in which the rotor is disposed, wherein N=4 and alpha 1 is less than or equal to 180° and comprises all of the coils of the motor, the number of coils of the motor being less than or equal to half the number of teeth, wherein the teeth all have an identical width such that the width is less than or equal to the notch width.
A gear motor, comprising:
- a reduction gear train;
- and
- a three-phase electric motor comprising a rotor and a stator, the stator formed by a stack of sheets and a number of electric coils that is a multiple of 3 and a rotor having k*N pairs of magnetized poles, with k=1 or 2, the stator having two separate angular sectors alpha 1 and alpha 2, which are centered on the center of rotation of the motor and comprise an alternation of notches and 3*k*N teeth, which are regularly spaced and converge toward the center of rotation and define a cavity in which the rotor is disposed, wherein N=4 and alpha 1 is less than or equal to 180° and comprises all of the coils of the motor, the number of coils of the motor being less than or equal to half the number of teeth, wherein the teeth comprise alternating wide and narrow teeth, the wide teeth having a width greater than or equal to twice the width of the narrow teeth, and wherein the notch width is greater than the width of the narrow teeth.
Dependencies are inferred from the claim text.