Electric machine for a motor vehicle, coil carrier for an electric machine, and motor vehicle

Patent metadata

Field	Value
Publication number	US-10361597-B2
Application number	US-201715434811-A
Country	US
Kind code	B2
Filing date	Feb 16, 2017
Priority date	Feb 17, 2016
Publication date	Jul 23, 2019
Grant date	Jul 23, 2019

Abstract

An electric machine for a motor vehicle includes a rotor, and a stator interacting with the rotor. The stator includes a laminated core, a coil carrier configured for a flow of a cooling fluid there through, and a coil assembly having a plurality of stator coils and arranged in the coil carrier. The coil carrier has an enclosed configuration so as to form a fluid seal against the laminated core and the rotor.

First claim

What is claimed is:

1. An electric machine for a motor vehicle, comprising:
a rotor; and
a stator interacting with the rotor, said stator including a laminated core, a coil carrier configured for a flow of a cooling fluid there through, and a coil assembly having a plurality of stator coils and arranged in the coil carrier, said coil carrier having an enclosed configuration so as to form a fluid seal against the laminated core and the rotor, wherein the laminated core has several teeth, said coil carrier having though opening defined by walls and traversed by the teeth, wherein the walls of the coil carrier define flow passageways inside the coil carrier, with cooling fluid flowing though the flow passageways in an axial direction, wherein the coil carrier includes at least one bulkhead arranged between two of said through opening and extending axially with respect to the rotor and the stator to divide at least one of the flow passageways.

2. The electric machine of claim 1 , wherein the bulkhead is structured to generate turbulence in the cooling fluid flowing through the at least one of the flow passageways.

3. The electric machine of claim 1 , wherein the teeth are configured for insertion into the laminated core and securement to the laminated core.

4. The electric machine of claim 1 , wherein the coil carrier has an inlet line and an outlet line for circulation of the cooling fluid through the coil carrier.

5. The electric machine of claim 1 , wherein the coil carrier has an opening which is sealed in a fluidtight manner, and an electrical connection received in the opening for connection to the coil assembly.

6. The electric machine of claim 1 , wherein the coil carrier includes a plurality of ring-segment shaped coil carrier segments separated from one another in a fluidtight manner, and further comprising a plurality of said coil assembly, said coil assemblies received in the coil carrier segments in one-to-one correspondence.

7. The electric machine of claim 1 , wherein the laminated core is made of a plurality of ring-segment shaped core segments.

8. The electric machine of claim 7 , wherein the coil carrier includes a plurality of ring-segment shaped coil carrier segments separated from one another in a fluidtight manner and arranged on the stator in registry with the core segments.

9. The electric machine of claim 7 , wherein the coil carrier includes a plurality of ring-segment shaped coil carrier segments separated from one another in a fluidtight manner and arranged on the stator in circumferential offset relationship to the core segments.

10. The electric machine of claim 1 , wherein the coil carrier includes a plurality of ring-segment shaped coil carrier segments separated from one another in a fluidtight manner, each said coil carrier segment being made of multiple parts including an outer wall and a base body which is open towards the outer wall for receiving the outer wall to close the base body, said outer wall being fastened to the base body.

11. A coil carrier for an electric machine for a motor vehicle, said coil carrier comprising a hollow body configured for flow of a cooling fluid there through, said hollow body having a plurality of a coil receiving spaces for placement of stator cons of a coil assembly, respectively, said hollow body being configured so as to seal the coil assembly in a fluidtight manner against a laminated core and a rotor of the electric machine, wherein the laminated core has several teeth, said coil carrier having through openings defined by walls and traversed by the teeth, wherein the walls of the coil carrier define flow passageways inside the coil carrier, with cooling fluid flowing though the flow passageways in an axial direction, wherein the coil carrier includes at least one bulkhead arranged between two of said through opening and extending axially with respect to a rotor and a stator interacting with the rotor of the electric machine to divide at least one of the flow passageways.

12. The coil carrier of claim 11 , wherein the hollow body includes walls to define through openings for traversal of teeth of the electric machine.

13. The coil carrier of claim 12 , wherein the walls define flow passageways in the hollow body for flow of cooling fluid there through in an axial direction.

14. The coil carrier of claim 13 , further comprising a bulkhead extending in axial and radial directions and splitting at least one of the flow passageways.

15. The coil carrier of claim 14 , wherein the bulkhead is structured to generate turbulence in the cooling fluid flowing through the at least one of the flow passageways.

16. The coil carrier of claim 11 , wherein the coil carrier has an inlet line and an outlet line for circulation of the cooling fluid through the coil carrier and/or an opening which is sealed in a fluidtight manner, with an electrical connection received in the opening for connection to the coil assembly.

17. The coil carrier of claim 11 , wherein the coil carrier is made of multiple parts including an outer wall and a base body which is open towards the outer wall for receiving the outer wall to dose the base body, said outer well being fastened to the base body.

18. A motor vehicle, comprising an electric machine, said electric machine comprising a rotor, and a stator interacting with the rotor, stator including a laminated core, a coil carrier configured for a flow of a cooling fluid there through, and a coil assembly having a plurality of stator coils and arranged in the coil carrier, said coil carrier having an enclosed configuration so as to form a fluid seal against the laminated core and the rotor, wherein the laminated core has several teeth, said coil carrier having through openings defined by walls and traversed by the teeth, wherein the walls of the coil carrier define flow passageways inside the coil carrier, with cooling fluid flowing through the flow passageways in an axial direction, wherein the coil carrier includes at least one bulkhead arranged between two of said through openings and extending axially with respect to the rotor and the stator to divide at least one of the flow passageways.

Assignees

• Audi Ag

Inventors

• Juris Peter

Classifications

• H02K3/522

  for generally annular cores with salient poles · CPC title

• H02K3/46 Primary

  Fastening of windings on the stator or rotor structure · CPC title

• H02K3/24

  with channels or ducts for cooling medium between the conductors · CPC title

• H02K1/20 Primary

  with channels or ducts for flow of cooling medium · CPC title

• H02K9/19

  for machines with closed casing and closed-circuit cooling using a liquid cooling medium, e.g. oil · CPC title