Motor

Patent metadata

Field	Value
Publication number	US-2021057955-A1
Application number	US-201816959285-A
Country	US
Kind code	A1
Filing date	Dec 27, 2018
Priority date	Jan 5, 2018
Publication date	Feb 25, 2021
Grant date	—

Abstract

The present invention may provide a motor including a shaft, a rotor coupled to the shaft, a stator disposed outside the rotor, and a bus bar disposed on the stator, wherein the bus bar includes a terminal connected to a coil of the stator, the terminal includes a first terminal and a second terminal which are separated from each other in a circuit manner, the first terminal includes a first neutral terminal and a plurality of first phase terminals, the second terminal includes a second neutral terminal and a plurality of second phase terminals, first curvature centers of the plurality of first phase terminals are disposed to be different, second curvature centers of the plurality of second phase terminals are disposed to be different, and a position of a curvature center of the first neutral terminal is the same as a position of a curvature center of the second neutral terminal.

First claim

1 . A motor comprising:
a shaft; a rotor coupled to the shaft; a stator disposed outside the rotor; and a bus bar disposed on the stator, wherein the bus bar includes a terminal connected to a coil of the stator, the terminal includes a first terminal and a second terminal which are separated from each other in a circuit manner, the first terminal includes a first neutral terminal and a plurality of first phase terminals, the second terminal includes a second neutral terminal and a plurality of second phase terminals, first curvature centers of the plurality of first phase terminals are disposed to be different, second curvature centers of the plurality of second phase terminals are disposed to be different, and a position of a curvature center of the first neutral terminal is the same as a position of a curvature center of the second neutral terminal.

2 . The motor of claim 1 , wherein a position of the first curvature center is different from a position of the second curvature center.

3 . The motor of claim 1 , wherein, when a virtual line passing through the curvature center of the first neutral terminal is referred to as a first reference line and when a virtual line perpendicular to the first reference line and passing through the curvature center of the first neutral terminal is referred to as a second reference line:
the first curvature center is disposed at any one side of the first reference line; the second curvature center is disposed at the other side of the first reference line; and the first curvature center and the second curvature center are disposed at any one side of the second reference line.

4 . The motor of claim 1 , wherein, when a virtual line passing through the curvature center of the first neutral terminal is referred to as a first reference line and when a virtual line perpendicular to the first reference line and passing through the curvature center of the first neutral terminal is referred to as a second reference line:
the first curvature center is disposed at any one side of the first reference line; the second curvature center is disposed at the other side of the first reference line; the first curvature center is disposed at any one side of the second reference line; and the second curvature center is disposed at the other side of the second reference line.

5 . The motor of claim 4 , wherein the first curvature center and the second curvature center are disposed to be rotationally symmetrical with respect to the curvature center of the first neutral terminal.

6 . The motor of claim 5 , wherein the first curvature center and the second curvature center are disposed to be point-symmetrical with respect to the curvature center of the first neutral terminal.

7 . The motor of claim 1 , wherein each of the first phase terminals and the second phase terminals includes:
a body; and protruding portions bent from the body in a radial direction with respect to the curvature center of the first neutral terminal.

8 . The motor of claim 7 , wherein the first neutral terminal and the second neutral terminal are disposed to be point-symmetrical with respect to the curvature center of the first neutral terminal.

9 . The motor of claim 7 , wherein:
each of the first phase terminals and the second phase terminals has a multilayer structure; and the protruding portion disposed on a second layer portion is disposed to cross an upper side of the body disposed on a first layer portion.

10 . The motor of claim 7 , wherein, when viewed in an axial direction:
any one of the plurality of protruding portions disposed on any one of the plurality of first phase terminals is disposed between one side end portion of the first neutral terminal and one side end portion of second neutral terminal; and any one of the plurality of protruding portions disposed on any one of the plurality of second phase terminals is disposed between the other side end portion of the first neutral terminal and the other side end portion of the second neutral terminal.

11 . The motor of claim 7 , wherein the protruding portions include:
a first end portion extending from the body in the radial direction; a second end portion protruding from the first end portion and electrically connected to the coil of the stator; and a third end portion branched off from the second end portion and electrically connected to a power cable.

12 . The motor of claim 4 , wherein each of the first phase terminals and the second phase terminals includes:
a body; and a protruding portion bent from the body in a radial direction with respect to the curvature center of the first neutral terminal, wherein the protruding portion includes a first end portion extending from the body in the radial direction, a second end portion protruding from the first end portion and electrically connected to the coil of the stator, and a third end portion branched off from the second end portion and electrically connected to a power cable, and the second end portion of the first phase terminal and the second end portion of the second phase terminal are disposed to be rotationally symmetrical with respect to the first curvature center.

Assignees

• Lg Innotek Co Ltd

Inventors

• Ryu Woong Seon

Classifications

• H02K3/50 Primary

  Fastening of winding heads, equalising connectors, or connections thereto · CPC title

• B62D5/0421

  Electric motor acting on or near steering gear · CPC title

• H02K2213/03

  Machines characterised by numerical values, ranges, mathematical expressions or similar information · CPC title

• H02K2203/09

  Machines characterised by wiring elements other than wires, e.g. bus rings, for connecting the winding terminations · CPC title

• H02K2203/06

  Machines characterised by the wiring leads, i.e. conducting wires for connecting the winding terminations · CPC title