Feedthrough capacitor assemblies

• US 8,154,846 B2
• Filed: 06/02/2009
• Issued: 04/10/2012
• Est. Priority Date: 06/02/2009
• Status: Active Grant

• Current Assignee: Astec International Limited (Emerson Electric Company)
• Original Assignee: Astec International Limited (Emerson Electric Company)
• Inventors: Fauer, Franz, Kopp, Christoph
• Primary Examiner(s): THOMAS, BRADLEY H
• Application Number:
  US12/476,283
• Publication Number:
  US 20100302702A1
• Time in Patent Office: 1,043 Days
• Field of Search: 361/302, 361/306.1, 361/307, 361/328, 361/329
• US Class Current: 361/302
• CPC Class Codes: H01G 4/35 Feed-through capacitors or anti-noise capacitors
• CPC Class Codes: H03H 2001/0014 Capacitor filters, i.e. capacitors whose parasitic inductance is of relevance to consider it as filter

Abstract

A feedthrough capacitor assembly for attachment to a mount having an opening is disclosed. The assembly includes a feedthrough terminal adapted for insertion through said opening for coupling a signal from a first side of the mount to a second side of the mount. The assembly includes a first conductive region extending about and electrically coupled to the feedthrough terminal and a second conductive region extending about the first conductive region. A plurality of capacitors are electrically coupled between the first conductive region and the second conductive region. The plurality of capacitors are arranged about the feedthrough terminal with each capacitor having about the same capacitance as each of the other capacitors.

Claims

1. A feedthrough capacitor assembly for attachment to a mount having an opening, the assembly comprising:

a feedthrough terminal adapted for insertion through said opening for coupling a signal from a first side of the mount to a second side of the mount;

a first conductive region extending about and electrically coupled to the feedthrough terminal;

a second conductive region extending about the first conductive region;

a plurality of capacitors electrically coupled between the first conductive region and the second conductive region, the plurality of capacitors arranged about the feedthrough terminal; and

a support plate having a central opening and opposite first and second sides, the feedthrough terminal extending through the central opening, the first side of the support plate adapted for contacting and electrically coupling to the mount around the mount opening, and the second side of the support plate contacting and electrically coupling to the second conductive region.

2. The assembly of claim 1 further comprising a nonconductive region positioned between the first conductive region and the second conductive region, the plurality of capacitors spanning the nonconductive region.

3. The assembly of claim 2 further comprising a circuit board having an opening, wherein the first and second conductive regions are disposed on the circuit board, the feedthrough terminal extends through the circuit board, and the plurality of capacitors are mounted to the circuit board.

4. The assembly of claim 3 wherein the plurality of capacitors are arranged annularly about the feedthrough terminal.

5. The assembly of claim 4 wherein the circuit board is a printed circuit board and the first conductive region and the second conductive region are traces on the printed circuit board.

6. The assembly of claim 5 wherein the support plate is a first support plate, the assembly further comprising a second support plate, the first support plate and the second support plate positioned on opposing sides of the circuit board, the first support plate mechanically connected to the second support plate.

7. The assembly of claim 6 wherein the assembly is attached to the mount with the feedthrough terminal extending through the opening and the second conductive region coupled to ground.

8. The assembly of claim 7 wherein the support plate includes a projecting flange for aligning the assembly with the opening in the mount.

9. The assembly of claim 7 wherein each capacitor has about the same capacitance as each of the other capacitors.

10. The assembly of claim 1 wherein the plurality of capacitors are arranged annularly about the feedthrough terminal.

11. The assembly of claim 10 further comprising a circuit board having an opening, wherein the first and second conductive regions are disposed on the circuit board, the feedthrough terminal extends through the circuit board opening, and the plurality of capacitors are mounted to the circuit board.

12. The assembly of claim 11 wherein the support plate is a first support plate, the assembly further comprising a second support plate, the first support plate and the second support plate positioned on opposing sides of the circuit board, the first support plate mechanically connected to the second support plate.

13. The assembly of claim 11 wherein the circuit board is a printed circuit board and the first conductive region and the second conductive region are traces on the printed circuit board.

14. The assembly of claim 1 wherein the support plate includes a projecting flange for aligning the assembly with the opening in the mount.

15. The assembly of claim 1 wherein the assembly is attached to the mount with the feedthrough terminal extending through the opening and the second conductive region coupled to ground.

16. The assembly of claim 1 wherein the plurality of capacitors is 40 capacitors.

17. The assembly of claim 1 wherein each capacitor has a capacitance of about 100 nanofarads.

18. The assembly of claim 1 wherein the plurality of capacitors is greater than four.

19. The assembly of claim 1 wherein each capacitor has about the same capacitance as each of the other capacitors.

20. The assembly of claim 1 further comprising a circuit board having an opening, wherein the first and second conductive regions are disposed on the circuit board, the feedthrough terminal extends through the circuit board opening, and the plurality of capacitors are mounted to the circuit board.