Electrically shielded direct current link busbar

• US 10,349,549 B2
• Filed: 07/28/2017
• Issued: 07/09/2019
• Est. Priority Date: 10/25/2016
• Status: Active Grant

• Current Assignee: General Electric Company
• Original Assignee: General Electric Company
• Inventors: Schuetz, Tobias, Dong, Xiaoting, Leuner, Philipp
• Primary Examiner(s): Cunningham, Xanthia C
• Application Number:
  US15/662,741
• Publication Number:
  US 20180116065A1
• Time in Patent Office: 711 Days
• Field of Search: None
• CPC Class Codes: H02M 1/44 Circuits or arrangements for compensating for electromagnetic interference in converters or inverters
• CPC Class Codes: H02M 7/003 Constructional details, e.g. physical layout, assembly, wiring or busbar connections
• CPC Class Codes: H02S 40/34 comprising specially adapted electrical connection means to be structurally associated with the PV module, e.g. junction boxes
• CPC Class Codes: H05K 7/1432 specially adapted for power drive units or power converters
• CPC Class Codes: H05K 7/14329 specially adapted for the configuration of power bus bars
• CPC Class Codes: H05K 7/1457 Power distribution arrangements
• CPC Class Codes: H05K 9/002 with localised screening
• CPC Class Codes: Y02E 10/50 Photovoltaic [PV] energy

Abstract

A shielded direct current link (“DC link”) busbar includes a central planar element that includes a first surface and a second surface axially opposed to the first surface. The shielded DC link busbar further includes a first conductive lamina disposed over the first surface and a second conductive lamina disposed over the second surface. Further, the first conductive lamina and the second conductive lamina are electrically coupled.

Claims

1. A shielded direct current link (“

DC link”

) busbar comprising;

a central planar element comprising a first surface and a second surface, said first surface axially opposed to said second surface;

a first conductive lamina disposed over said first surface; and

a second conductive lamina disposed over said second surface, wherein said first conductive lamina and said second conductive lamina are electrically coupled, wherein said central planar element comprises a first insulative layer, a first conductive layer coupled to said first insulative layer, a second insulative layer coupled to said first conductive layer, a second conductive layer coupled to said second insulative layer, and a third insulative layer coupled to said second conductive layer.

2. The shielded DC link busbar of claim 1, wherein said central planar element comprises a plurality of insulative layers interleaved with a plurality of conductive layers.

3. The shielded DC link busbar of claim 1 further comprising a first insulative lamina disposed over said first conductive lamina.

4. The shielded DC link busbar of claim 1 further comprising a second insulative lamina disposed over said second conductive lamina.

5. The shielded DC link busbar of claim 1 further comprising a plurality of pairs of input and output terminals, wherein said plurality of pairs of input and output terminals are configured to electrically couple to at least one power inverter.

6. The shielded DC link busbar of claim 5, wherein said plurality of pairs of output terminals comprise a plurality of pairs of positive terminals and negeative terminals.

7. The shielded DC link busbar of claim 1 further comprising a plurality of pairs of capacitor terminals, wherein each of said plurality of pairs of capacitor terminals are configured to electrically couple to one of a plurality of capacitors.

8. The shielded DC link busbar of claim 7, wherein said plurality of pairs of capacitor terminals are electrically coupled in at least one of parallel and series.

9. The shielded DC link busbar of claim 1, wherein said first conductive lamina comprises a copper lamina.

10. The shielded DC link busbar of claim 1, wherein said second conductive lamina comprises a copper lamina.

11. The shielded DC link busbar of claim 1, wherein said first conductive lamina is in electrical contact with said first surface.

12. The shielded DC link busbar of claim 1, wherein said second conductive lamina is in electrical contact with said second surface.

13. The shielded DC link busbar of claim 1 further comprising a conductive element configured to electrically couple said DC link to ground.

14. The shielded DC link busbar of claim 13, wherein said conductive element is configured to electrically couple to a cabinet that houses said DC link.

15. A power conversion system comprising:

a plurality of capacitors;

at least one power inverter; and

a shielded direct current link (“

DC link”

) busbar according to claim 1 electrically coupled to said plurality of capacitors and said at least one power inverter.

16. The power conversion system of claim 15 further comprising a first insulative lamina disposed over said first conductive lamina.

17. The power conversion system of claim 15 further comprising a second insulative lamina disposed over said second conductive lamina.

18. A power generation system comprising:

a power source;

a plurality of capacitors;

at least one power inverter; and

a shielded direct current link (“

DC link”

) busbar according to claim 1 electrically coupled to said power source.