Bus bar structure for a motor
AssigneeNidec Corporation
InventorsKeisuke Fukunaga, Takayuki Migita
Life of this patent
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Abstract
A motor includes a busbar made of metal and a busbar holder made of resin. The busbar includes a plate shaped portion and terminals extending upward from the plate shaped portion and electrically connected to an end portion of a conducting wire included in coils. In addition, a busbar portion defined by the busbar and the busbar holder and a rotor overlap each other in an axial direction. The busbar portion widens in a radial direction, and dimensions of the entire motor in the radial direction are significantly reduced or minimized. In addition, the number of busbars stacked in the axial direction is reduced. As a result, the dimensions of the motor in the axial direction are significantly reduced or minimized.
Claims14
A motor comprising:
- a stationary section;
- and
- a rotating section which rotatably supported about a center axis which extends upward and downward;
- wherein
- the stationary section includes:
- a plurality of coils arranged in a circumferential direction;
- busbars made of metal, which are positioned above the plurality of coils and electrically connected to conducting wires included in the coils;
- and
- a busbar holder made of a resin, which holds the busbars;
- the rotating section includes:
- a shaft disposed along the center axis;
- and
- a rotor which is positioned on an inside of the plurality of coils in a radial direction and is fixed to the shaft;
- the busbars each include:
- a plate-shaped portion which widens along a plane perpendicular or substantially perpendicular to the center axis;
- and
- a plurality of terminals which extend upward from the plate-shaped portion and are directly electrically connected to an end portion of the conducting wire;
- a busbar portion is defined by the busbars and the busbar holder, and the rotor overlaps the busbar portion in an axial direction;
- and
- a total number of the busbars overlapping in the radial direction is two or three;
- and
- the plurality of terminals of each of the busbars are arranged along a single plane perpendicular or substantially perpendicular toy the center axis.
Dependencies are inferred from the claim text.