Capacitor assembly for an alternator and a method for the manufacture thereof

• US 20030030964A1
• Filed: 07/08/2002
• Published: 02/13/2003
• Est. Priority Date: 08/07/2001
• Status: Active Grant

• Current Assignee: Mitsubishi Denki Kabushiki Kaisha (Mitsubishi Electric Corporation)
• Original Assignee: Mitsubishi Denki Kabushiki Kaisha (Mitsubishi Electric Corporation)
• Inventors: Asao, Yoshihito, Oohashi, Atsushi, Morikaku, Hideki
• Granted Patent: US 6,735,071 B2
• Time in Patent Office: Days
• US Class Current: 361/306.1
• CPC Class Codes: H02K 11/026 Suppressors associated with brushes, brush holders or their supports
• CPC Class Codes: H02K 11/028 Suppressors associated with the rotor
• CPC Class Codes: H02K 11/049 Rectifiers associated with stationary parts, e.g. stator cores
• CPC Class Codes: H02K 11/05 Rectifiers associated with casings, enclosures or brackets
• CPC Class Codes: H02K 5/141 for cooperation with slip-rings
• CPC Class Codes: Y10T 29/43 Electric condenser making
• CPC Class Codes: Y10T 29/49009 Dynamoelectric machine
• CPC Class Codes: Y10T 29/49169 Assembling electrical component directly to terminal or elongated conductor
• CPC Class Codes: Y10T 29/49172 by molding of insulating material

Abstract

During molding of a brush holder which is a resin-molded part in an alternator, a capacitor component is molded integrally with a capacitor positive electrode terminal and a capacitor negative electrode terminal joined by crimping to a positive terminal and a negative terminal, respectively. The capacitor component is thereby embedded in a first resin portion.

Claims

1. A capacitor assembly for an alternator, comprising:

a resin-molded part formed by molding using a first molding resin, said resin-molded part being mounted to an alternator case;

a positive terminal and a negative terminal insert molded into said resin-molded part; and

a capacitor component installed between a battery terminal end and ground, said capacitor component having a capacitor positive electrode terminal and a capacitor negative electrode terminal for electrical connection to said positive terminal and said negative terminal,

wherein said capacitor component is molded integrally into said resin-molded part so as to be embedded in said resin-molded part.

2. The capacitor assembly for an alternator according to claim 1 wherein connection portions between said positive terminal and said capacitor positive electrode terminal and between said negative terminal and said capacitor negative electrode terminal are embedded in said resin-molded part.

3. The capacitor assembly for an alternator according to claim 2 wherein said positive terminal and said capacitor positive electrode terminal and said negative terminal and said capacitor negative electrode terminal are connected by crimping.

4. The capacitor assembly for an alternator according to claim 2 wherein said positive terminal and said capacitor positive electrode terminal and said negative terminal and said capacitor negative electrode terminal are connected by welding.

5. The capacitor assembly for an alternator according to claim 1 wherein said capacitor component is premolded using a second molding resin such that at least tip portions of said capacitor positive electrode terminal and said capacitor negative electrode terminal are exposed.

6. The capacitor assembly for an alternator according to claim 5 wherein said second molding resin has a melting point higher than the molding temperature of said first molding resin.

7. The capacitor assembly for an alternator according to claim 5 wherein said first and second molding resins are identical resins.

8. The capacitor assembly for an alternator according to claim 1 wherein a bag-shaped cover prepared using a second molding resin is mounted to said capacitor component such that at least tip portions of said capacitor positive electrode terminal and said capacitor negative electrode terminal are exposed.

9. The capacitor assembly for an alternator according to claim 8 wherein said second molding resin has a melting point higher than the molding temperature of said first molding resin.

10. The capacitor assembly for an alternator according to claim 8 wherein said first and second molding resins are identical resins.

11. The capacitor assembly for an alternator according to claim 1 wherein:

said positive terminal and said capacitor positive electrode terminal are prepared using a single metal material; and

said negative terminal and said capacitor negative electrode terminal are prepared using a single metal material.

12. A method for manufacturing a capacitor assembly for an alternator, comprising the step of molding a positive terminal, a negative terminal, and a capacitor component using a first molding resin to integrally mold, said capacitor component having a capacitor positive electrode terminal and a capacitor negative electrode terminal for electrical connection to said positive terminal and said negative terminal, and being installed between a battery terminal end and ground.

13. The method for manufacturing a capacitor assembly for an alternator according to claim 12, further comprising the step of connecting said positive terminal and said capacitor positive electrode terminal and connecting said negative terminal and said capacitor negative electrode terminal before said molding step.

14. The method for manufacturing a capacitor assembly for an alternator according to claim 13, further comprising the step of premolding said capacitor component using a second molding resin before said connecting step such that at least tip portions of said capacitor positive electrode terminal and said capacitor negative electrode terminal are exposed.

15. The method for manufacturing a capacitor assembly for an alternator according to claim 13, further comprising the step of mounting to said capacitor component a bag-shaped cover composed of a second molding resin before said connecting step such that at least tip portions of said capacitor positive electrode terminal and said capacitor negative electrode terminal are exposed.

16. The method for manufacturing a capacitor assembly for an alternator according to claim 12, wherein connection portions between said positive terminal and said capacitor positive electrode terminal and between said negative terminal and said capacitor negative electrode terminal are molded integrally in said molding step so as to be exposed from said first molding resin:

the method further comprising the step of connecting the connection portions of said positive terminal and said capacitor positive electrode terminal and connecting the connection portions of said negative terminal and said capacitor negative electrode terminal following said molding step.

17. The method for manufacturing a capacitor assembly for an alternator according to claim 16, further comprising the step of embedding said connection portions between said positive terminal and said capacitor positive electrode terminal and between said negative terminal and said capacitor negative electrode terminal using an elastic resin following said connecting step.

18. The method for manufacturing a capacitor assembly for an alternator according to claim 12, wherein said positive terminal, said capacitor positive electrode terminal, said negative terminal and said capacitor negative electrode terminal are linked by means of a linking portion to form a terminal member composed of a single metal material, said terminal member being molded integrally in said molding step so as to expose a portion of said linking portion from said first molding resin:

the method further comprising the step of cutting the potion of said linking portion exposed from said first molding resin following said molding step.