DC source assemblies
Embodiments of DC source assemblies of power inverter systems of the type suitable for deployment in a vehicle having an electrically grounded chassis are provided. An embodiment of a DC source assembly comprises a housing, a DC source disposed within the housing, a first terminal, and a second terminal. The DC source also comprises a first capacitor having a first electrode electrically coupled to the housing, and a second electrode electrically coupled to the first terminal. The DC source assembly further comprises a second capacitor having a first electrode electrically coupled to the housing, and a second electrode electrically coupled to the second terminal.
1. A DC source assembly comprising:
a DC source having a first terminal and a second terminal;
a housing comprising a conductive material and having disposed within the DC source, a first capacitor, and a second capacitor;
wherein the first capacitor has a first electrode electrically coupled to the housing and a second electrode electrically coupled to the first terminal; and
wherein the second capacitor has a first electrode electrically coupled to the housing, and a second electrode electrically coupled to the second terminal.
2. The DC source assembly of claim 1 , further comprising:
a third capacitor having a first electrode electrically coupled to the housing, and having a second electrode electrically coupled to the first terminal; and
a fourth capacitor having a first electrode electrically coupled to the housing, and having a second electrode electrically coupled to the second terminal.
3. The DC source assembly of claim 1 , wherein the DC source assembly is disposed within a vehicle having an electrically grounded chassis and wherein the conductive member is electrically coupled to the chassis.
4. The DC source assembly of claim 3 , wherein the DC source assembly is electrically coupled to a power inverter assembly comprising:
a housing electrically coupled to the grounded vehicle chassis; and
a power module disposed within the power inverter assembly housing, wherein the power module includes a third capacitor electrically connected between the power module and a ground node.
5. A power inverter system suitable for deployment in a vehicle, the vehicle having an electrically grounded chassis, the system comprising:
a DC source assembly, the DC source assembly comprising:
a housing comprising conductive material that is disposed within the vehicle and electrically coupled to the chassis,
a DC source disposed within the housing and having a first terminal and a second terminal, and
an EMI filter disposed within the housing and electrically coupled to the housing and the DC source; and
a power inverter assembly electrically coupled to the DC source assembly.
6. The power inverter system of claim 5 , wherein the EMI filter comprises:
a first capacitor having a first electrode electrically coupled to the vehicle chassis and a second electrode electrically coupled to the first terminal of the DC source; and
a second capacitor having a first electrode electrically coupled to the vehicle chassis and a second electrode electrically coupled to the second terminal of the DC source.
7. The power inverter system of claim 6 , wherein the EMI filter further comprises:
a third capacitor having a first electrode electrically coupled to the vehicle chassis and a second electrode electrically coupled to the first terminal of the DC source; and
a fourth capacitor having a first electrode electrically coupled to the vehicle chassis and a second electrode electrically coupled to the second terminal of the DC source.
8. The power inverter system of claim 5 , wherein the housing is grounded to the vehicle chassis.
9. The power inverter system of claim 5 , wherein the power inverter assembly comprises:
a chassis electrically coupled to the vehicle chassis;
a power module housed within the chassis and comprising an IGBT/power diode pair; and
a bus bar housed within the chassis and electrically coupled to the power module.
10. A DC source assembly for deployment in a vehicle, the vehicle having an electrically grounded chassis, the DC source assembly comprising:
a housing comprising conductive material and electrically coupled to the vehicle chassis;
a DC source disposed within the housing;
a first terminal contactor electrically coupled to the DC source;
a second terminal contactor electrically coupled to the DC source;
a first capacitor disposed within the housing having a first electrode electrically coupled to the first terminal contactor and a second electrode electrically and physically, directly connected to the housing; and
a second capacitor disposed within the housing having a first electrode electrically coupled to the second terminal contactor and a second electrode electrically and physically, directly connected to the housing.
11. The DC source assembly of claim 10 wherein the first capacitor and the second capacitor are disposed within the housing.
12. The DC source assembly of claim 10 wherein the first capacitor and the second capacitor comprise a polypropylene material.
13. The DC source assembly of claim 10 wherein the DC source assembly is electrically coupled to a power inverter assembly housed within the vehicle.