Bus bar assembly

1 . A bus bar assembly comprising:

a plurality of arc-shape body portions provided with different lengths and disposed to be layered in a radial direction;

coil connection portions formed integrally with the body portions and provided at predetermined intervals on outer circumferential surfaces of the body portions, and connected to a stator coil; and

terminals formed integrally with the body portions and protruding from one end side of each of the body portions in an axial direction, and disposed to be layered in a horizontal direction,

wherein each of the terminals includes a terminal base provided on one end side of the body portion, and

terminal bodies formed to protrude from the terminal base in the axial direction,

wherein two or more groove portions having different areas are provided in at least one of the terminal bodies so that wire resistance values between the body portions are equalized.

2 . The bus bar assembly of claim 1 , wherein the coil connection portion includes a fusing base formed to protrude from a lower side of the body portion in the axial direction, and

a fusing portion protruding from a lower end of the fusing base in an outer circumferential direction to fuse with the stator coil.

3 . The bus bar assembly of claim 2 , wherein one or two fusing portions are provided on each of the fusing bases in a hook shape.

4 . The bus bar assembly of claim 1 , wherein the terminal base extends to a lower side of the body portion and is provided at a height greater than a height of the body portion.

5 . The bus bar assembly of claim 1 , wherein the terminal base includes a bent portion bent from one end side of the body portion in an outer circumferential direction, and

a folded portion bent from a lower end side of the terminal body in the axial direction.

6 . The bus bar assembly of claim 1 , wherein the terminal bodies protrude in the axial direction and are disposed to be layered at equal intervals in the horizontal direction.

7 . The bus bar assembly of claim 1 , wherein the terminal bodies are provided at the same height as each other and each have an upper end portion formed in a wedge shape.

8 . A bus bar assembly comprising:

a first bus bar in which a first body portion, a first coil connection portion, and a first terminal are integrally provided;

a second bus bar in which a second body portion, a second coil connection portion, and a second terminal are integrally provided; and

a third bus bar in which a third body portion, a third coil connection portion, and a third terminal are integrally provided,

wherein each of the first body portion, the second body portion, and the third body portion has an arc shape having a different diameter and is disposed to be layered in a radial direction,

wherein the first terminal includes:

a first terminal base provided at one end side of the first body portion; and

a first terminal body formed to protrude from the first terminal base in an axial direction,

the second terminal includes:

a second terminal base provided at one end side of the second body portion; and

a second terminal body formed to protrude from the second terminal base in the axial direction, and

the third terminal includes:

a third terminal base provided at one end side of the third body portion; and

a third terminal body formed to protrude from the third terminal base in the axial direction,

wherein two or more groove portions having different areas are provided in at least one of the first terminal body, the second terminal body, or the third terminal body, which are disposed to be layered in a horizontal direction so that wire resistance values between the first bus bar, the second bus bar, and the third bus bar are equalized.

9 . The bus bar assembly of claim 8 , wherein a diameter of the first body portion is larger than a diameter of the second body portion, and

the diameter of the second body portion is larger than a diameter of the third body portion.

10 . The bus bar assembly of claim 8 , wherein an interval between the first body portion and the second body portion in the radial direction is formed to be the same as an interval between the second body portion and the third body portion in the radial direction.

11 . The bus bar assembly of claim 8 , wherein the first body portion, the second body portion, and the third body portion are formed at different lengths and heights, and upper portions thereof are disposed at the same height.

12 . The bus bar assembly of claim 8 , wherein the first coil connection portion includes:

a first fusing base formed to protrude from a lower side of the first body portion in an axial direction; and

first fusing portions protruding from both sides of a lower end of the first fusing base in an outer circumferential direction and fusing with a stator coil,

the second coil connection portion includes:

a second fusing base formed to protrude from a lower side of the second body portion in the axial direction; and

a second fusing portion protruding from one side of a lower end of the second fusing base in the outer circumferential direction and fusing with the stator coil, and

the third coil connection portion includes:

a third fusing base formed to protrude from a lower side of the third body portion in the axial direction; and

a third fusing portion protruding from one side of a lower end of the third fusing base in the outer circumferential direction and fusing with the stator coil.

13 . The bus bar assembly of claim 12 , wherein the first fusing portion, the second fusing portion, and the third fusing portion are formed and disposed at the same height.

14 . The bus bar assembly of claim 12 , wherein each of the first fusing portion, the second fusing portion, and the third fusing portion is formed in a hook shape having an opening into which one end portion of the stator coil is inserted in the same direction.

15 . The bus bar assembly of claim 8 , wherein the first terminal base extends to a lower side of the first body portion and is provided at a height greater than a height of the first body portion, and includes:

a first bent portion bent from one end side of the first body portion in an outer circumferential direction; and

a first folded portion bent from a lower end side of the first terminal body in an axial direction,

the second terminal base extends to a lower side of the second body portion and is provided at a height greater than a height of the second body portion, and includes:

a second bent portion bent from one end side of the second body portion in the outer circumferential direction; and

a second folded portion bent from a lower end side of the second terminal body in the axial direction, and

the third terminal base extends to a lower side of the third body portion and is provided at a height greater than a height of the third body portion, and includes:

a third bent portion bent from one end side of the third body portion in the outer circumferential direction; and

a third folded portion bent from a lower end side of the third terminal body in the axial direction.

16 . The bus bar assembly of claim 8 , wherein the first terminal body, the second terminal body, and the third terminal body are provided at the same height,

the third terminal body is disposed between the first terminal body and the second terminal body, and

an interval between the first terminal body and the third terminal body is formed to be the same as an interval between the second terminal body and the third terminal body.

17 . The bus bar assembly of claim 8 , wherein the first body portion is formed to be longer than the second body portion, and

the second body portion is formed to be longer than the third body portion.

18 . The bus bar assembly of claim 17 , wherein the second terminal body includes a second groove portion,

the third terminal body includes a third groove portion, and

the third groove portion is formed to have a larger area than the second groove portion.