Bus bar and motor including the same
A bus bar includes an insulator and a plurality of terminals inserted into the insulator and connected to the coil of a stator. The central axes of virtual circles extended from the inner circumferential surfaces of the plurality of terminals are differently disposed. The insulator may have a simple structure because the terminals having the same shape are assembled. The productivity of an assembly process can be improved.
1. A bus bar comprising:
an insulator;
a first power terminal disposed in the insulator;
a second power terminal disposed in the insulator;
a third power terminal disposed in the insulator; and
a neutral terminal disposed in the insulator,
wherein central axes of a plurality of virtual circles extended from the first power terminal to the third power terminal having curvature are different,
wherein an inside surface of a second end of the first power terminal faces an outside surface of the second power terminal, and an outside surface of a first end of the first power terminal faces an inside surface of the third power terminal.
2. The bus bar of claim 1 , wherein:
each of the first to the third power terminals has a partial ring shape, and
central axes of a plurality of virtual circles extended from the partial rings are offset from each other.
3. The bus bar of claim 1 , wherein:
a central axis of virtual circle connecting central axes of a plurality of virtual circles extended from the first to the third power terminals is identical with a central axis of a virtual circle extended from the neutral terminal.
4. The bus bar of claim 3 , wherein an angle between the central axes of the plurality of virtual circles extended from the first to the third power terminals is identical around the central axis of the virtual circle extended from the neutral terminal.
5. The bus bar of claim 4 , wherein the angle between the central axes of the plurality of virtual circles extended from the first to the third power terminals is 120°.
6. The bus bar of claim 3 , wherein an interval between a first end of each of the first to the third power terminals and a virtual line extended from the neutral terminal is different from an interval between a second end of the first to the third power terminals and the virtual line extended from the neutral terminal.
7. The bus bar of claim 3 , wherein the first to the third power terminals have an identical shape.
8. The bus bar of claim 3 , wherein each of the first to the third power terminals comprises:
a first connection member having specific curvature in a length direction;
at least one power connection terminal combined with the first connection member and connected to any one of phases of the three-phase power source; and
at least one terminal end combined with the power connection terminal and connected to a coil wound on the stator.
9. The bus bar of claim 8 , wherein the power connection terminal protrudes in an axis direction based on the first connection member.
10. The bus bar of claim 8 , wherein a point at which the terminal end is connected to the power connection terminal is higher than a top surface of the first connection member in an axis direction.
11. The bus bar of claim 8 , wherein the terminal end protrudes in a direction vertical to an axis direction.
12. The bus bar of claim 3 , wherein the neutral terminal comprises:
a second connection member having specific curvature in a length direction; and
at least one terminal end combined with the second connection member and connected to a coil wound on the stator,
wherein the second connection member is longer than the first connection member.
13. A motor, comprising:
a stator configured to comprise a stator core and a coil wound on the stator core; and
a bus bar combined with the stator,
wherein the bus bar comprises an insulator and a plurality of terminals disposed in the insulator and connected to the coil, and
wherein central axes of virtual circles extended from the plurality of terminals are different,
wherein the plurality of terminals comprises a plurality of power terminals connected to a three-phase power source and a neutral terminal,
wherein a central axis of virtual circle connecting central axes of the plurality of power terminals is identical with a central axis of the neutral terminal,
wherein an angle between the central axes of the plurality of power terminals is identical around the central axis of the neutral terminal.
14. The motor of claim 13 , wherein an interval between a first end of each of the plurality of power terminals and a virtual line extended from the neutral terminal is different from an interval between a second end of each of the plurality of power terminals and the virtual line extended from the neutral terminal.
15. The motor of claim 13 , wherein the plurality of power terminals have an identical shape.