Turbocharger including an electric machine

Patent metadata

Field	Value
Publication number	US-10174669-B2
Application number	US-201515315502-A
Country	US
Kind code	B2
Filing date	May 27, 2015
Priority date	Jun 3, 2014
Publication date	Jan 8, 2019
Grant date	Jan 8, 2019

Abstract

A turbocharger for a motor vehicle, including a compressor, which has a compressor wheel situated on a rotatably supported shaft, an electric machine being situated in a pipe section of an axial compressor inlet, the electric machine including a rotor situated on the shaft and a stator situated on the pipe section. The stator has multiple webs projecting inward which are distributed over the circumference and extend at least essentially in an axial direction, the webs being used for forming flow channels which extend in an axial direction and are situated at a distance from one another.

First claim

What is claimed is:

1. A turbocharger for a motor vehicle, comprising:
a compressor which includes a compressor wheel situated on a rotatably supported shaft, an electric machine situated in a pipe section of an axial compressor inlet, the electric machine including a rotor situated on the shaft, and a stator situated on the pipe section;
wherein the stator has multiple webs projecting inward which are distributed over a circumference of the stator and extend in an axial direction, the webs being used for forming flow channels which extend in an axial direction and are situated at a distance from one another; and
wherein the webs are part of a stator core of the stator and are partially wound by windings, and wherein each of the webs has an aerodynamic, flow-optimized, drop-shaped profile formed in an axial extension.

2. The turbocharger as recited in claim 1 , wherein the webs are situated uniformly distributed over the circumference.

3. The turbocharger as recited in claim 1 , wherein at least the webs of the stator are made from a ferromagnetic material.

4. The turbocharger as recited in claim 1 , wherein the stator is provided with at least one winding in the area of the webs which only partially fills the flow channel.

5. The turbocharger as recited in claim 1 , wherein the turbocharger is an exhaust gas turbocharger and has a turbine including a rotatably supported turbine wheel, which is operatively connected to the compressor wheel by the shaft.

6. The turbocharger as recited in claim 5 , wherein the compressor wheel and the turbine wheel are connected to one another operatively by a freewheel clutch which allows the compressor wheel to overtake the turbine wheel.

Assignees

• Bosch Gmbh Robert

Inventors

• Immendoerfer Ingo
• Baeuerle Michael
• Nau Michael

Classifications

• H02K9/06

  with fans or impellers driven by the machine shaft · CPC title

• F02B39/10

  electric · CPC title

• F04D25/024

  the driving means being assisted by a power recovery turbine · CPC title

• F01D15/10 Primary

  Adaptations for driving, or combinations with, electric generators · CPC title

• H02K1/20

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