Busbar, motor, and power transmission system using same

1. A motor comprising:

a housing;

a stator disposed in the housing;

a rotor disposed in the stator;

a shaft disposed in the rotor; and

a busbar disposed on the stator,

wherein the busbar includes an insulating body, a plurality of neutral terminals disposed in the insulating body, and a plurality of driving terminals disposed in the insulating body,

wherein the plurality of driving terminals includes a first terminal set and a second terminal set electrically disconnected from the first terminal set,

wherein the first terminal set includes a first U-phase terminal, a first V-phase terminal, and a first W-phase terminal,

wherein the second terminal set includes a second U-phase terminal, a second V-phase terminal, and a second W-phase terminal,

wherein a diameter of a first virtual circle connected to a first end of each of the first U-phase terminal, the first V-phase terminal, and the first W-phase terminal is smaller than a diameter of a second virtual circle connected to a second end of each of the first U-phase terminal, the first V-phase terminal, and the first W-phase terminal, and

wherein centers of the first virtual circle and the second virtual circle are identical.

2. The motor of claim 1 , wherein each of the first U-phase terminal, the second U-phase terminal, the first V-phase terminal, the second V-phase terminal, the first W-phase terminal, and the second W-phase terminal comprises:

a body portion comprising the first end and the second end;

a first connection portion connected to the first end of the body portion; and

a second connection portion connected to the second end of the body portion,

wherein each body of the second U-phase terminal, the second V-phase terminal, and second W-phase terminal is disposed between the first virtual circle and the second virtual circle.

3. The motor of claim 2 , wherein the first U-phase terminal, the first V-phase terminal, the first W-phase terminal, the second U-phase terminal, the second V-phase terminal, and the second W-phase terminal have the same shape.

4. The motor of claim 3 , wherein the first connection portion and the second connection portion protrude toward an outside of the second virtual circle.

5. The motor of claim 4 , wherein a curvature of each of the body portions of the first U-phase terminal, the first V-phase terminal, the first W-phase terminal, the second U-phase terminal, the second V-phase terminal, and the second W-phase terminal is changed from the first end toward the second end thereof.

6. The motor of claim 5 , wherein each of the body portions of the first U-phase terminal, the first V-phase terminal, the first W-phase terminal, the second U-phase terminal, the second V-phase terminal, and the second W-phase terminal has a spiral shape.

7. The motor of claim 3 , wherein each of the first U-phase terminal, the second U-phase terminal, the first V-phase terminal, the second V-phase terminal, the first W-phase terminal, and the second W-phase terminal comprises:

a first extension portion disposed between the first connection portion and the body portion; and

a second extension portion disposed between the second connection portion and the body portion,

wherein the first extension portion and the second extension portion extend in a direction perpendicular to the direction of the shaft.

8. The motor of claim 7 , wherein a length of the first extension portion is longer than a length of the second extension portions.

9. The motor of claim 2 , wherein each of the plurality of neutral terminals has the same shape.

10. The motor of claim 1 , wherein the neutral terminals, the first terminal set, and the second terminal set are electrically insulated from each other.

11. The motor of claim 1 , wherein the insulating body includes a first hole formed at a center of the insulating body,

wherein a diameter of the first hole is less than that of the first virtual circle, and wherein centers of the first hole, the first virtual circle, and the second virtual circle are identical.