Electrical machine

Patent metadata

Field	Value
Publication number	US-11159072-B2
Application number	US-201816205566-A
Country	US
Kind code	B2
Filing date	Nov 30, 2018
Priority date	Nov 30, 2017
Publication date	Oct 26, 2021
Grant date	Oct 26, 2021

Abstract

An electrical machine (10), in particular a machine which can be operated in electric generator mode and/or in electric motor mode, comprising a rotor (14) which has a shaft (13), wherein a part of a turbomachine (68) is formed on the shaft (13) and the part is a fan (60), wherein the fan (60) has a circumference (83) with a circumferential direction (85), and a housing (63) of an electrical unit (45) is adjacent to the fan (60) and serves as a housing of the turbomachine (68), and there is a gap (65) between the fan (60) and the housing (63) of the electrical unit (45), characterized in that the gap (65) has a radial width (B65R) which has a different magnitude depending on a circumferential position (U602) on the fan (60) which is arranged on the shaft (13).

First claim

What is claimed is:

1. An electrical machine ( 10 ), comprising a rotor ( 14 ) which has a shaft ( 13 ), wherein a fan ( 60 ) is formed on the shaft ( 13 ) and has a rotation axis ( 78 ), wherein the fan ( 60 ) is a part of a turbomachine ( 68 ) and has a circumference ( 83 ) with a circumferential direction ( 85 ), wherein a housing ( 63 ) of an electrical unit ( 45 ) includes a cutout ( 58 ) into which the fan ( 60 ) protrudes, the housing ( 63 ) serving as a housing of the turbomachine ( 68 ), wherein a centerline of the cutout ( 58 ) is spaced apart from the rotation axis ( 78 ), and wherein a gap ( 65 ) between the fan ( 60 ) and the housing ( 63 ) has a radial width (B 65 R) which has a different magnitude depending on a circumferential position (U 602 ) on the fan ( 60 ).

2. The electrical machine ( 10 ) according to claim 1 , characterized in that the gap ( 65 ) continually increases at least in sections in the circumferential direction ( 85 ).

3. The electrical machine ( 10 ) according to claim 1 , characterized in that the gap ( 65 ) is formed with mirror symmetry in relation to a plane along the rotation axis ( 78 ).

4. The electrical machine ( 10 ) according to claim 1 , characterized in that the gap ( 65 ) is formed in a non-symmetrical manner in relation to a plane along the rotation axis ( 78 ).

5. The electrical machine ( 10 ) according to claim 1 , characterized in that the fan ( 60 ) is arranged opposite a base ( 105 ) of the housing ( 63 ) of the electrical unit ( 45 ), wherein the base ( 105 ) is arranged between the fan ( 60 ) and a heat-generating structural element ( 108 ).

6. The electrical machine ( 10 ) according to claim 5 , characterized in that the base ( 105 ) of the housing ( 63 ) has a uniform thickness (T 105 ) over a diameter of the fan ( 60 ).

7. The electrical machine ( 10 ) according to claim 1 , wherein the machine is configured to be operated in electric generator mode and/or in electric motor mode.

8. The electrical machine ( 10 ) according to claim 1 , wherein the cutout ( 58 ) is cylindrical.

Assignees

• Bosch Gmbh Robert

Inventors

• Ruck Tobias
• Weissenborn Erik
• Neufeld Dimitra
• Udich Sebastian

Classifications

• H02K9/06 Primary

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

• H02K5/207

  with openings in the casing specially adapted for ambient air · CPC title

• H02K11/215

  Magnetic effect devices, e.g. Hall-effect or magneto-resistive elements · CPC title

• H02K13/003

  Structural associations of slip-rings · CPC title

• H02K7/14 Primary

  Structural association with mechanical loads, e.g. with hand-held machine tools or fans (with fan or impeller for cooling the machine H02K9/06) · CPC title