Electrical insulator casing

Patent metadata

Field	Value
Publication number	US-8964401-B2
Application number	US-201113292251-A
Country	US
Kind code	B2
Filing date	Nov 9, 2011
Priority date	Oct 14, 2011
Publication date	Feb 24, 2015
Grant date	Feb 24, 2015

Abstract

Systems, processes, and manufactures are provided that employ a casing associated with an electrical component to provide some, most, substantially all or all electrical insulative protection necessary for the electrical component. This casing may be further employed with potting or other materials to supplement and add additional or different protections for the component. These additional protections can include additional insulative resistance, thermal protection, moisture protection and other buffers to and from the environment.

First claim

What is claimed is:

1. A power converter comprising:
a plurality of electrical components connected to a printed circuit board;
an outer enclosure surrounding one or more of the electrical components;
an electrical insulative casing positioned between one or more of the electrical components and the outer enclosure, the casing comprising a polymer or other nonmetallic material; and
a potting material, the potting material positioned between the electrical insulative casing and one or more of the electrical components,
wherein the electrical insulative casing comprises one or more ports, the ports providing access to electrical components when the power converter is fully assembled or to potting material flow during assembly of the power converter or both.

2. The power converter of claim 1 wherein the potting material is insufficient to meet one or more published requirements for insulative capacity and wherein the insulative casing alone or in combination with the potting material is sufficient to meet or exceed one or more published requirements for insulative capacity of electrical components within the outer enclosure.

3. The power converter of claim 1 wherein at least the outer enclosure comprises five or more sides or the printed circuit board comprises a solar photovoltaic module microinverter having a DC input and an AC output.

4. The power converter of claim 1 wherein the electrical insulative casing comprises a top having a full skyline or partial skyline profile, the full skyline profile mimicking a profile of several electrical components, the partial skyline profile mimicking a profile of at least one electrical component.

5. The power converter of claim 1 wherein the outer enclosure comprises a base, the base comprising casing spacers, one or more thermal pads, and means for connecting the base with a cover.

6. The power converter of claim 1 wherein the outer enclosure comprises a base and a cover, the base and a cover sealable with a sealing gasket, wherein connecting means serve to hold the base and cover together, and wherein the connecting means is outside of the perimeter of the sealing gasket.

7. The power converter of claim 1 wherein the outer enclosure comprises a base and a cover, the cover comprising one or more domes, a sealing edge and a plurality of tabs, the sealing edge and plurality of tabs positioned to mate with the base when the outer enclosure is in a closed configuration.

8. The power converter of claim 1 further comprising a port flow blocking means.

9. The power converter of claim 1 wherein the potting material covers targeted electrical components with a minimum thickness of potting material.

10. The power converter of claim 1 further comprising a photovoltaic module or other renewable energy source, the photovoltaic module or other renewable energy source electrically coupled to the printer circuit board.

11. A process for assembling an electrical component enclosure, the process comprising:
positioning a printed circuit board within an electrical insulative casing;
positioning the printed circuit board and insulative casing within an outer enclosure; and at least one of the following,
punching out a punchout on the insulative casing, the insulative casing comprising a polymer or another nonmetallic material, or
placing a gasket between a top of the outer enclosure and a bottom of the outer enclosure and securing the outer enclosure top to the outer enclosure bottom with fasteners positioned outside of the gasket and a seal created by the gasket mating with the outer enclosure top and the outer enclosure bottom,

wherein before or after each of the previous positioning steps, deploying potting material near and around electrical components on the printed circuit board, the potting material insufficient by itself to provide the amount of electrical insulative resistance necessary to satisfy one or more previously published electrical requirements for the printed circuit board and electrical components, and
wherein the electrical insulative casing comprises one or more ports, the ports providing access to electrical components when the electrical insulative casing is fully assembled or to potting material flow during assembly of the electrical insulative casing or both.

12. The process of claim 11 further comprising:
selecting the potting material after considering the electrical insulative properties of the electrical insulative casing.

13. The process of claim 11 further comprising:
curing the potting material with heat or light.

14. The process of claim 11 further comprising:
forming the profile of the insulative casing to mimic electrical components of the printed circuit board, and
deploying potting material to fill voids between the insulative casing and the electrical components.

15. A power converter comprising:
a plurality of electrical components connected to a printed circuit board;
an outer enclosure surrounding one or more of the electrical components;
an electrical insulative casing positioned between one or more of the electrical components and the outer enclosure, the casing comprising a polymer or other nonmetallic material; and
a potting material, the potting material positioned between the electrical insulative casing and one or more of the electrical components,
wherein the electrical insulative casing fully surrounds one or more of the electrical components,
wherein the electrical insulative casing comprises one or more structural reinforcement contours on a casing wall, and
wherein the outer enclosure comprises a metal.

16. A power converter comprising:
a plurality of electrical components connected to a printed circuit board;
an outer enclosure surrounding one or more of the electrical components;
an electrical insulative casing positioned between one or more of the electrical components and the outer enclosure, the casing comprising a polymer or other nonmetallic material; and
a potting material, the potting material positioned between the electrical insulative casing and one or more of the electrical components,
wherein the outer enclosure comprises one or more thermal pads, wherein the electrical insulative casing comprises one or more openings for thermal energy to pass from at least one of the electrical components to a thermal pad.

17. The power converter of claim 16 wherein the printed circuit board comprises a solar photovoltaic module microinverter having a DC input and an AC output.

18. The power converter of claim 16 wherein the electrical insulative casing comprises a top having a full skyline or partial skyline profile, the full skyline profile mimicking a profile of several electrical components, the partial skyline profile mimicking a profile of at least one electrical component.

19. The power converter of claim 16 wherein the outer enclosure comprises a base, the base comprising casing spacers, one or more thermal pads, and means for connecting the base with a cover.

20. The power converter of claim 16 wherein the outer enclosure comprises a base and a cover, the base and a cover sealable with a sealing gasket, wherein connecting means serve to hold the base and cover together, and wherein the connecting means is outside of the perimeter of the sealing gasket.

21. The power converter of claim 16 wherein the outer enclosure comprises a base and a cover, the cover comprising one or more domes, a sealing edge and a plurality of tabs, the sealing edge and plurality of tabs posi

Assignees

• Escamilla Eduardo
• Marroquin Marco
• Morris William John
• Morrison John Trevor
• Parker Thomas Paul
• Wurmlinger Stephen
• Sunpower Corp

Inventors

• Escamilla Eduardo
• Marroquin Marco
• Morris William John
• Morrison John Trevor
• Parker Thomas Paul
• Wurmlinger Stephen

Classifications

• H05K5/10

  comprising several parts forming a closed casing · CPC title

• H05K5/065 Primary

  sealed by encapsulation, e.g. waterproof resin forming an integral casing, injection moulding · CPC title

• Y10T29/49146

  with encapsulating, e.g., potting, etc. · CPC title

• H05K5/03

  Covers · CPC title

• H05K7/1427

  Housings · CPC title