Electrical machine having a shielding plate

Patent metadata

Field	Value
Publication number	US-9504192-B2
Application number	US-201514675989-A
Country	US
Kind code	B2
Filing date	Apr 1, 2015
Priority date	Apr 4, 2014
Publication date	Nov 22, 2016
Grant date	Nov 22, 2016

Abstract

Electrical machine ( 12 ) having a shielding plate ( 10 ), wherein the electrical machine ( 12 ) comprises a housing part ( 32 ) in which is arranged an electronic unit ( 14 ), and said electrical machine also comprises a metal heat sink ( 34 ) that is arranged on the housing part ( 32 ), wherein the electronic unit ( 14 ) is arranged between the shielding plate ( 10 ) and the heat sink ( 34 ).

First claim

What is claimed is:

1. An electrical machine ( 12 ), wherein the electrical machine ( 12 ) comprises a housing part ( 32 ) in which is arranged an electronic unit ( 14 ) and said electrical machine also comprises a metal heat sink ( 34 ) that is arranged on the housing part ( 32 ), characterized in that the electronic unit ( 14 ) is arranged between a shielding plate ( 10 ) and the heat sink ( 34 ), wherein a pole housing ( 13 ) is electrically connected to the shielding plate ( 10 ).

2. The electrical machine ( 12 ) as claimed in claim 1 , characterized in that the shielding plate ( 10 ) comprises a frame ( 16 ), wherein the frame ( 16 ) extends around an outside of the shielding plate, and a pole housing ( 13 ) of the electrical machine ( 12 ) is arranged within the frame ( 16 ).

3. The electrical machine ( 12 ) as claimed in claim 1 , characterized in that one or more of the following is arranged within the frame: a receiving device ( 17 ) for the pole housing ( 13 ); a continuous filled-in plate ( 24 ); a lattice ( 26 ) and a single cut-out ( 19 ).

4. The electrical machine ( 12 ) as claimed in claim 1 , characterized in that the shielding plate ( 10 ) is fastened to the electrical machine ( 12 ) by means of clamps ( 283 , 30 ), wherein the clamps ( 283 , 30 ) engage in clamping sites ( 341 ) of the heat sink ( 34 ), and the clamps ( 283 , 30 ) encompass the housing part ( 32 ) and the heat sink ( 34 ).

5. The electrical machine ( 12 ) as claimed in claim 1 , characterized in that the clamps ( 283 , 30 ) are frame clamps ( 283 ) that are attached as one piece to the frame ( 16 ).

6. The electrical machine ( 12 ) as claimed in claim 1 , characterized in that the shielding plate ( 10 ) comprises resilient clamping elements ( 284 , 285 ) that are attached as one piece to the frame ( 16 ), and that the resilient clamping elements ( 284 , 285 ) electrically contact the pole housing ( 13 ) and/or the heat sink ( 34 ) within and/or outside the housing part ( 32 ).

7. The electrical machine ( 12 ) as claimed in claim 1 , characterized in that the clamps ( 283 , 30 ) are attached to the heat sink ( 34 ) in a materially connected manner.

8. The electrical machine ( 12 ) as claimed in claim 1 , characterized in that the shielding plate ( 10 ) comprises through-going holes ( 281 ) configured to receive connecting elements with which the shielding plate ( 10 ) is screwed on to and/or riveted on to the housing part ( 32 ) and/or the heat sink ( 34 ).

9. The electrical machine ( 12 ) as claimed in claim 1 , characterized in that the shielding plate ( 10 ) is arranged on an outside on a base plate of the housing part ( 32 ) that lies opposite the heat sink ( 34 ).

10. The electrical machine ( 12 ) as claimed in claim 1 , characterized in that the shielding plate ( 10 ) is arranged within the housing part ( 32 ).

11. The electrical machine ( 12 ) as claimed in claim 1 , characterized in that there is an electrically conductive connection between the heat sink ( 34 ) and the shielding plate ( 10 ).

12. The electrical machine ( 12 ) as claimed in claim 11 , characterized in that the electrically conductive connection is produced by means of metal spacers ( 36 ) that are arranged between the heat sink ( 34 ) and the shielding plate ( 10 ) so that said heat sink and shielding plate directly contact one another in an electrical manner.

13. The electrical machine ( 12 ) as claimed in claim 1 , characterized in that the housing part ( 32 ) is embodied from synthetic material and the electronic unit ( 14 ) is embodied as a printed circuit board and the shielding plate ( 10 ) extends approximately parallel to the circuit board.

14. The electrical machine ( 12 ) as claimed in claim 1 , characterized in that the heat sink ( 34 ) is embodied as a housing lid that closes the housing part ( 32 ).

15. The electrical machine ( 12 ) as claimed in claim 1 , characterized in that a pole housing ( 13 ) is electrically connected as one piece to the shielding plate ( 10 ).

16. The electrical machine ( 12 ) as claimed in claim 1 , characterized in that the shielding plate ( 10 ) is arranged within the housing part ( 32 ) and the housing part ( 32 ) is injection molded around said plate.

17. The electrical machine ( 12 ) as claimed in claim 1 , characterized in that the housing part ( 32 ) is embodied from synthetic material and the electronic unit ( 14 ) is embodied as a printed circuit board that extends over an entire base plate of the housing part ( 32 ) and the shielding plate ( 10 ) extends approximately parallel to the circuit board.

18. An electrical machine ( 12 ), wherein the electrical machine ( 12 ) comprises a housing part ( 32 ) in which is arranged an electronic unit ( 14 ) and said electrical machine also comprises a metal heat sink ( 34 ) that is arranged on the housing part ( 32 ), wherein the electronic unit ( 14 ) is arranged between a shielding plate ( 10 ) and the heat sink ( 34 ), and wherein the shielding plate ( 10 ) is arranged within the housing part ( 32 ).

19. An electrical machine ( 12 ), wherein the electrical machine ( 12 ) comprises a housing part ( 32 ) in which is arranged an electronic unit ( 14 ) and said electrical machine also comprises a metal heat sink ( 34 ) that is arranged on the housing part ( 32 ), wherein the electronic unit ( 14 ) is arranged between a shielding plate ( 10 ) and the heat sink ( 34 ), and wherein the housing part ( 32 ) is embodied from synthetic material and the electronic unit ( 14 ) is embodied as a printed circuit board and the shielding plate ( 10 ) extends approximately parallel to the circuit board.

Assignees

• Bosch Gmbh Robert

Inventors

• Hansen Sebastian
• Meyer Christian

Classifications

• H05K7/2039

  characterised by the heat transfer by conduction from the heat generating element to a dissipating body (arrangements for increasing/decreasing heat-transfer, e.g. fins details, F28F13/00) · CPC title

• H02K11/33

  Drive circuits, e.g. power electronics (H02K11/38 takes precedence) · CPC title

• H05K7/209

  Heat transfer by conduction from internal heat source to heat radiating structure (H05K7/20909 takes precedence) · CPC title

• H02K5/20

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

• H02K5/08

  Insulating casings · CPC title