Systems for integrating choke into inverter header sub-assembly for improving EMC performance
An inverter assembly may include a housing with a base and side walls, wherein one of the side walls includes an opening extending through the wall, and wherein the side walls form a periphery around an interior of the housing. An inverter assembly may include a header with a body, the body having a first end and a second end, wherein the body further includes a flange disposed between the first end and the second end, and wherein a portion of the body extends through the opening such that the flange abuts the side wall. An inverter assembly may include a bracket positioned within the interior of the housing and coupled to the housing. An inverter assembly may include a choke that is fully enclosed in a circumferential direction, wherein the choke is positioned within the bracket and against an inner surface of the bracket facing the opening.
1 . An inverter assembly comprising:
a housing having a base and a plurality of side walls extending away from the base, wherein a first side wall of the plurality of side walls includes an opening extending through the first side wall, and wherein the plurality of side walls form a periphery around an interior of the housing;
a header with a body, the body having a first end and a second end, wherein the body further includes a flange disposed between the first end and the second end, and wherein a portion of the body extends through the opening such that the flange abuts the first side wall;
a bracket positioned within the interior of the housing, and wherein the bracket is coupled to an inner surface of the housing;
a choke, wherein the choke is positioned within the bracket and against an inner surface of the bracket facing the opening, and wherein the choke is fully enclosed in a circumferential direction of the choke by the bracket along an entire axial length of the choke; and
a spacer positioned between the header and the choke at the second end of the body of the header, wherein the spacer is fully enclosed in a circumferential direction of the spacer by the bracket along an entire axial length of the spacer.
2 . The inverter assembly of claim 1 , wherein the choke has an enclosed channel extending through the choke.
3 . The inverter assembly of claim 1 , wherein the coupling between the bracket and the inner surface of the housing includes a seal.
4 . The inverter assembly of claim 1 , wherein the bracket is coupled to the inner surface of the housing at more than one location.
5 . The inverter assembly of claim 4 , wherein each coupling is coupled by an M4 screw.
6 . The inverter assembly of claim 1 , wherein the inverter assembly further comprises a spacer that is disposed between the header and the choke, and wherein the spacer is fully enclosed in the circumferential direction.
7 . The inverter assembly of claim 6 , wherein the spacer comprises a foam material.
8 . The inverter assembly of claim 6 , wherein the spacer has an enclosed channel extending through the spacer.
9 . The inverter assembly of claim 6 , wherein the spacer directly contacts the header and the choke.
10 . The inverter assembly of claim 6 , wherein the choke is fixed relative to the housing, header, bracket, and spacer.
11 . The inverter assembly of claim 6 , wherein the spacer is fixed relative to the housing, header, bracket, and choke.
12 . The inverter assembly of claim 6 , wherein the choke has an enclosed channel extending through it and the spacer has an enclosed channel extending through it such that the enclosed channel of the choke and the enclosed channel of the spacer are in communication with one another.
13 . The inverter assembly of claim 6 , wherein the choke has an enclosed channel extending through it, the spacer has an enclosed channel extending through it, and the bracket has a channel extending through it such that the enclosed channel of the choke, the enclosed channel of the spacer, and the channel of the bracket are in communication with one another.
14 . The inverter assembly of claim 13 , wherein wiring extends from the header through the enclosed channel of the choke, the enclosed channel of the spacer, and the channel of the bracket.
15 . The inverter assembly of claim 1 , wherein the choke is a ferrite choke.
16 . An inverter comprising:
a housing having a base and a plurality of side walls extending away from the base, wherein a first side wall of the plurality of side walls includes an opening extending through the first side wall, and wherein the plurality of side walls form a periphery around an interior of the housing;
a header with a body, the body having a first end and a second end, wherein the body further includes a flange disposed between the first end and the second end, and wherein a portion of the body extends through the opening such that the flange abuts the first side wall;
a bracket positioned within the interior of the housing, and wherein the bracket is coupled to an inner surface of the housing;
a choke, wherein the choke is positioned within the bracket and against an inner surface of the bracket facing the opening, and wherein the choke is fully enclosed in a circumferential direction of the choke by the bracket along an entire axial length of the choke;
a spacer positioned between the header and the choke at the second end of the body of the header, wherein the spacer is fully enclosed in a circumferential direction of the spacer by the bracket along an entire axial length of the spacer; and
power electronics configured to convert direct current to alternating current.
17 . The inverter of claim 16 , wherein the choke is a ferrite choke.
18 . The inverter of claim 16 , wherein the choke has an enclosed channel extending through it, the spacer has an enclosed channel extending through it, and the bracket has a channel extending through it such that the enclosed channel of the choke, the enclosed channel of the spacer, and the channel of the bracket are in communication with one another.
19 . The inverter of claim 18 , wherein wiring extends from the header through the enclosed channel of the choke, the enclosed channel of the spacer, and the channel of the bracket such that the wiring connects the power electronics.