Electric switching device

• US 4,803,590 A
• Filed: 03/23/1987
• Issued: 02/07/1989
• Est. Priority Date: 07/30/1985
• Status: Expired due to Fees

• Current Assignee: Robert Bosch GmbH
• Original Assignee: Robert Bosch GmbH
• Inventors: Fassel, Reinhard, Haubner, Georg, Zobl, Hartmut
• Primary Examiner(s): Pellinen, A. D.
• Assistant Examiner(s): Thompson, Gregory D.
• Application Number:
  US07/041,084
• Time in Patent Office: 687 Days
• Field of Search: 165/803, 165/185, 174/16 HS, 357/76, 357/81, 361/386-387, 361/395, 361/399, 361/424, 439/485, 439/487
• US Class Current: 361/704
• CPC Class Codes: H05K 1/0203 Cooling of mounted components H05K1/0272 takes precedence
• CPC Class Codes: H05K 2201/066 Heatsink mounted on the surface of the PCB heatsink inserted in the PCB H05K2201/10416
• CPC Class Codes: H05K 2201/10166 Transistor
• CPC Class Codes: H05K 2201/10189 Non-printed connector
• CPC Class Codes: H05K 2201/10454 Vertically mounted
• CPC Class Codes: H05K 2201/10522 Adjacent components
• CPC Class Codes: H05K 3/3447 Lead-in-hole components H05K3/3415 takes precedence
• CPC Class Codes: H05K 7/20854 Heat transfer by conduction from internal heat source to heat radiating structure H05K7/20863 takes precedence
• CPC Class Codes: H05K 9/0018 with provisions to reduce aperture leakages in walls, e.g. terminals, connectors, cables

Abstract

An electrical switching device includes a hermetically sealed housing enclosing at least one power switching component mounted on a cooling plate and a plurality of connector parts which are guided out of the housing. In order to eliminate heat generated by the switching component, portions of the connector parts within the housing are embedded in a heat conducting, electrically insulating material which is in contact with the cooling plate such that the heat is abducted via the cooling plate, the heat conducting material and the connector parts by a heat conducting and electrically insulating foil.

Claims

1. Switching device including at least one power switching component arranged in a completely insulated housing, comprising at least one heat conducting cooling body arranged in said housing for supporting said power switching component;

a plurality of connector parts arranged opposite said cooling body and being fed through said housing;

heat conducting, electrically insulating means having an area contact with said cooling body and enclosing portions of said connector parts in said housing to establish a path for abducting out of said housing the heat generated by said power switching component.

2. Switching device according to claim 1 wherein a plurality of power switching components is mounted in contact with said at least one cooling body.

3. Switching device according to claim 1 wherein a thin foil of an electrically insulating material is provided between said cooling body and said power switching component.

4. Switching device according to claim 1 wherein said heat conducting, electrically insulating means includes a high-frequency shielding material.

5. Switching device according to claim 4 wherein said heat conducting, electrically insulating means is of a plastic filled with ferrite.

6. Switching device according to claim 4 wherein said heat conducting, electrically insulating means is of a metallic oxide ceramic.

7. Switching device according to claim 1 wherein said heat conduction, electrically insulating means includes a thin foil (24) having an area contact with said cooling body.

8. Switching device according to claim 7 wherein said foil is of a plastic filled with ferrite.

9. Switching device according to claim 7 wherein said foil is of a metallic oxide ceramic.

10. Switching device according to claim 1 wherein said cooling body partially surrounds said connector parts to shield the same against high-frequency radiation.