Module for controllers and brush holders and method of manfacturing it

• US 5,675,205 A
• Filed: 05/26/1995
• Issued: 10/07/1997
• Est. Priority Date: 06/01/1994
• Status: Expired due to Term

• Current Assignee: Robert Bosch GmbH
• Original Assignee: Robert Bosch GmbH
• Inventors: Greiner, Christian, Jacob, Wolfgang
• Primary Examiner(s): Dougherty, Thomas M.
• Assistant Examiner(s): ENAD, ELVIN GENARGUE
• Application Number:
  US08/450,478
• Time in Patent Office: 865 Days
• Field of Search: 310/239, 310/71, 310/68 D, 310/68 R
• US Class Current: 310/239
• CPC Class Codes: H02K 19/36 Structural association of synchronous generators with auxiliary electric devices influencing the characteristic of the generator or controlling the generator, e.g. with impedances or switches
• CPC Class Codes: H02K 5/141 for cooperation with slip-rings
• CPC Class Codes: H02K 5/148 Slidably supported brushes
• CPC Class Codes: H02K 9/28 Cooling of commutators, slip-rings or brushes e.g. by ventilating

Abstract

A module for an electronic circuit of chip or hybrid design, combined with a brush holder for generators in motor vehicles has connecting lines embedded between the electronic circuit, the carbon brushes and a plug-in terminal in a housing component made of insulating material. The circuit which is bonded or soldered to a bearing plate is surrounded, for the purpose of making contact with the contacting lines by a collar of the housing component which is closed by a lid. For good dissipation of heat and cost effective manufacture of this module, the bearing plate with the circuit is to be attached directly to the generator housing and the brush holder with its contact components for the brush terminals is also to be formed on in one piece to the housing component.

Claims

1. A module for an electronic circuit of chip or hybrid design, combined with a brush holder for electrical machines, comprising a housing component consisting of insulating material and having a collar with an opening;

a brush holder with carbon brushes;

a controller circuit for said carbon brushes and having a contact component embedded in said housing component with the exception of contacting areas of said contact component which are free of the insulating material of said housing component while all remaining areas of said contact component are embedded in the insulating material of said housing component;

an electrically conductive bearing plate, said controller circuit being fixed as a controller circuit on said bearing plate at ground potential and surrounded by said collar of said housing component, said housing component being attached to said bearing plate and being connected to said contact areas, said contacting areas projecting into said opening of said collar;

a lid closing said opening of said collar; and

attachment means for attaching said bearing plate to said housing component in order to dissipate heat, said brush holder together with its contact components for terminals of said carbon brushes being formed of one piece with said housing component composed of insulating material.

2. A module as defined in claim 1;

and further comprising a sealing compound which fills said opening of said collar of said housing component at least above said contacting areas.

3. A module as defined in claim 1, wherein said opening of said collar of said housing component has a peripheral, outwardly widened shoulder, said lid being pot-shaped and having a peripheral, outwardly directed edge with which said lid fits on said shoulder.

4. A module as defined in claim 3;

and further comprising an adhesive which at least partially fills a peripheral gap formed between a wall of said lid and a wall of said widened shoulder.

5. A module as defined in claim 1, wherein said housing component with said contact components as insertion components form one prefabricated unit while said bearing plate with said attachment means and said controller circuit form another prefabricated unit, said prefabricated units being bonded with one another over an area.

6. A module as defined in claim 5, wherein said attachment means are formed as attachment holes.

7. A module as defined in claim 5;

and further comprising bonding wires which connect said controller circuit to said contacting areas of said connecting lines.

8. A module as defined in claim 5;

and further comprising means for prefixing said prefabricated units and including a projection provided on said housing component and an opening provided in said bearing plate so that said projection engages in said opening.

9. A module as defined in claim 1;

and further comprising an intermediate carrier which together with said controller circuit forms a monolithic chip attached to said bearing plate.

10. A module as defined in claim 1, wherein said controller circuit has a plurality of components wires to one another by bonding connections and is attached to said bearing plate.

11. A module as defined in claim 10, wherein said components are components of an integrated circuit.

12. A module as defined in claim 10, wherein said components are elements of a hybrid design.

13. A module as defined in claim 10, wherein said controller circuit is attached to said bearing plate directly.

14. A module as defined in claim 10;

and further comprising a metal intermediate carrier with which said controller circuit is attached to said bearing plate.

15. A module as defined in claim 1, wherein said bearing plate is injection molded into said housing component of insulating material.

16. A module as defined in claim 1, wherein said contact components include a connecting line which connects said controller circuit with said carbon brushes.

17. A module as defined in claim 1, wherein said contact components include one of said contacting areas.

18. A module for an electronic circuit of chip or hybrid design, combined with a brush holder for electrical machines, comprising a housing component consisting of insulating material and having a collar with an opening;

a brush holder with carbon brushes;

a controller circuit for said carbon brushes and having a contact component embedded in said housing component with the exception of contact areas of said contact component which are free of the insulating material of said housing component while all remaining areas of said contact component are embedded in the insulating material of said housing component;

an electrically conductive bearing plate, said controller circuit being fixed as a controller circuit on said bearing plate at ground potential and surrounded by said collar of said housing component, said housing component being attached to said bearing plate and being connected to said contact areas, said contact areas projecting into said opening of said collar;

a lid closing said opening of said collar; and

attachment means for attaching said bearing plate to said housing component in order to dissipate heat, said brush holder together with its contact components for terminals of said carbon brushes being formed of one piece with said housing component composed of insulating material, said controller circuit with said collar surrounding it being arranged on a front side of said bearing plate in a central area of the brush holder and next to them on one half of said bearing plate, another half of said bearing plate remaining essentially free in order to dissipate heat to cooling air.

19. A module as defined in claim 18, wherein on the other half of said bearing plate said housing component has, in addition to said brush holder, a terminal for supplying voltage to said controller circuit.