Electrical device, particularly for driving a motively and/or regeneratively operable electric machine

• US 8,014,151 B2
• Filed: 10/16/2006
• Issued: 09/06/2011
• Est. Priority Date: 10/14/2005
• Status: Active Grant

• Current Assignee: Robert Bosch GmbH
• Original Assignee: Robert Bosch GmbH
• Inventors: Kienle, Wolfram, Jerg, Juergen, Ilic, Erich, Saur, Dietmar
• Primary Examiner(s): CHERVINSKY, BORIS LEO
• Application Number:
  US12/083,443
• Publication Number:
  US 20090201649A1
• Time in Patent Office: 1,786 Days
• Field of Search: None
• US Class Current: 361/707
• CPC Class Codes: H02M 7/003 Constructional details, e.g. physical layout, assembly, wiring or busbar connections
• CPC Class Codes: H05K 7/20927 Liquid coolant without phase change

Abstract

An electrical device, particularly for driving a motively and/or regeneratively operable electric machine, having at least one switching-element module, which may be for inverting and/or rectifying electric currents, the switching-element module being able to be cooled by a cooling device and resting at least indirectly thereon, a fixation element, at least one conductor, as well as the switching-element module and cooling device being disposed one above the other.

Claims

1. An electrical device to drive at least one of a motively operable electric machine and a regeneratively operable electric machine, comprising:

at least one switching-element module, the switching-element module being able to be cooled by a cooling device, and resting at least indirectly thereon;

an assembly module, which includes a fixation element for pressing the switching-element module against the cooling device, and at least one conductor fastened to the fixation element by a fastening element, wherein the assembly module, the switching-element module and the cooling device are disposed one above the other, wherein the at least one switching-element module performs at least one of inversion and rectification of an electric current, wherein at least one conductor is electrically separated by at least one insulating intermediate layer, and wherein the fixation element is connectable to the electrical ground.

2. The electrical device of claim 1, wherein the at least one conductor is used for a power supply of a phase connection of the electric machine.

3. The electrical device of claim 1, wherein the at least one conductor is electrically isolated from the fixation element by at least one insulating intermediate layer.

4. The electrical device of claim 3, wherein resting on the at least one conductor are further conductors which are electrically isolated from each other by insulating intermediate layers.

5. The electrical device of claim 3, wherein the insulating intermediate layers project at least sectionally beyond the conductors.

6. The electrical device of claim 3, wherein a position of at least one of (i) at least one insulating intermediate layer and (ii) at least one conductor with respect to the fixation element is determined by a centering element.

7. The electrical device of claim 1, wherein the fixation element is made of a same material as a base of the switching-element module.

8. The electrical device of claim 1, wherein an elastic element is disposed between the fixation element and the switching-element module.

9. The electrical device of claim 1, wherein conductors project from several sides of the switching-element module, power conductors project from one side, and signal conductors project from another side.

10. The electrical device of claim 9, wherein at least one of the power conductors and the signal conductors point away with their ends from the cooling device.

11. The electrical device of claim 9, wherein the group of signal conductors includes one conductor which permits a voltage supply to the circuit substrate.

12. The electrical device of claim 1, wherein a shielding element at least partially covers at least one conductor.

13. The electrical device of claim 12, wherein the shielding element is disposed between the at least one conductor and a circuit substrate.

14. The electrical device of claim 1, wherein a relative position of the switching-element module with respect to the cooling device is defined by positive-locking elements.

15. The electrical device of claim 1, wherein the fixation element is connected to an electrical ground regardless of a potential state of the at least one conductor.

16. The electrical device of claim 1, further comprising:

pins secured on the switching element module that extend into holes in a housing bottom.

17. The electrical device of claim 1, wherein the switching element has an electronic circuit in its interior.

18. The electrical device of claim 1, further comprising:

at least two switchable half-bridges that alter a provided direct current so that an alternating current or three-phase current is produced in the at least one conductor.

19. The electrical device of claim 1, further comprising:

a platform having a plurality of cooling channels.

20. The electrical device of claim 1, further comprising:

pins secured on the switching element module that extend into holes in a housing bottom;

at least two switchable half-bridges that alter a provided direct current so that an alternating current or three-phase current is produced in the at least one conductor;

wherein the fixation element is connected to an electrical ground regardless of a potential state of the at least one conductor, and

wherein the switching element has an electronic circuit in its interior.

21. The electrical device of claim 20, further comprising:

a platform having a plurality of cooling channels.

22. The electrical device of claim 1, wherein the centering element is an insulator.

23. The electrical device of claim 1, wherein the fixation element, using the centering element, is electrically separated from the at least one phase conductor.