Electric motor, power apparatus using the same, and self-propelled snow remover
AssigneeHonda Motor Co., Ltd.
InventorsYoshihiko Yamagishi, Yoshihisa Hirose, Tsutomu Mizoroke
Life of this patent
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Abstract
A electric motor is disclosed in which torque ripple is reduced. The electric motor includes a single motor shaft. Rotors are disposed so as to be mutually offset in phase, and the rotors are secured to the motor shaft. Stators are arranged so as to individually correspond to the rotors, and the stators are disposed so as to be matched in phase. The phases of torque ripple generated in each motor unit, which is comprised of a combination of a single rotor and a single stator, are offset.
Claims9
An electric motor comprising:
- a motor shaft;
- a plurality of rotors arranged in an axial direction of and secured to the motor shaft;
- and
- a plurality of stators arranged in the axial direction so as to individually correspond to the rotors,
- wherein the stators are disposed with mutually matching phases while the rotors are disposed with mutually offset phases.
An electric motor comprising:
- a motor shaft;
- a plurality of rotors arranged in an axial direction of and secured to the motor shaft;
- and
- a plurality of stators arranged in the axial direction so as to individually correspond to the rotors,
- wherein the rotors are disposed with mutually matching phases while the stators are disposed with mutually offset phases.
A power apparatus comprising:
- an electric motor;
- a plurality of driver circuits for supplying drive current to the electric motor;
- a controller for controlling the driver circuit;
- the electric motor comprising:
- a motor shaft,
- at least one rotor provided on the motor shaft, and
- a plurality of stators arranged along the motor shaft in correspondence with the rotor;
- wherein each of the stators has an electrically independent winding, the driver circuit is comprised of a plurality of units for individually supplying drive current to each winding of the stators in the electric motor, and the controller individually controls the driver circuits so as to individually control the winding of each stator.
A self-propelled snow remover comprising:
- snow-removal implements including an auger and a dozer;
- travel devices including crawlers and wheels;
- and
- traveling electric motors provided for exclusively driving the travel devices,
- wherein each of the traveling electric motors comprise:
- a motor shaft;
- a rotor provided on the motor shaft;
- and
- a stator disposed in such a manner as to correspond to the rotor, one of the rotor and the stator being divided into a plurality of members arranged in an axial direction of the motor, the divided members each having electrically independent winding.
Dependencies are inferred from the claim text.