Inverter drive system, bus bar and assembly

1. An inverter drive assembly, comprising:

a first bus bar having a plurality of bushings, including at least a first bushing and a second bushing, the first bus bar being configured to receive at least one DC link capacitor of the inverter drive assembly via the second bushing;

a second bus bar electrically connected to the first bus bar at the first bushing; and

an inverter electrically connected to the second bus bar, the inverter being configured to receive electrical current through the second bus bar;

wherein a height of the first bushing defines an air gap of approximately 5 millimeters between the first bus bar and the second bus bar.

2. The inverter drive assembly of claim 1 , wherein:

the height of the first bushing is approximately 5 millimeters.

3. The inverter drive assembly of claim 2 , wherein:

a height of the second bushing is approximately 1.8 millimeters.

4. The inverter drive assembly of claim 2 , wherein:

the second bus bar includes a conductor that is secured to the first bushing of the first bus bar; and

the air gap is defined by a lower surface of the conductor and an upper surface of the first bus bar.

5. The inverter drive assembly of claim 4 , wherein:

the first bus bar and second bus bar are oriented substantially perpendicular to one another.

6. The inverter drive assembly of claim 4 , wherein:

the inverter drive assembly is installed on an off-highway vehicle.

7. The inverter drive assembly of claim 4 , wherein:

the at least one first bushing is a pair of first bushings.

8. The inverter drive assembly of claim 4 , wherein:

the first bus bar is a laminated bus bar having a first layer and a second layer;

wherein the first layer and the second layer substantially entirely overlap.

9. A bus bar for an inverter drive assembly of a vehicle, comprising:

a first layer;

a second layer laminated to the first layer;

at least one first bushing configured to receive a capacitor; and

at least one second bushing configured to receive an inverter bus bar connected to an inverter of the inverter drive assembly;

wherein the at least one second bushing is approximately 5 millimeters in height; and

wherein the first layer and the second layer substantially entirely overlap.

10. The bus bar of claim 9 , wherein:

the height of the second bushing defines an air gap between the first layer and a conductor of the inverter bus bar.

11. The bus bar of claim 10 , wherein:

the air gap is approximately 5 millimeters in height.

12. The bus bar of claim 9 , wherein:

the at least one first bushing is approximately 1.8 millimeters in height.

13. The bus bar of claim 9 , wherein:

the bus bar is installed in the vehicle, and the vehicle is an off-highway vehicle.

14. The bus bar of claim 13 , wherein:

the off-highway vehicle is a locomotive.

15. The bus bar of claim 10 , wherein:

the at least one second bushing is configured to receive the inverter bus bar at a substantially perpendicular orientation to the bus bar.

16. A method comprising:

providing a first bus bar; and

connecting a second bus bar having a conductor to the first bus bar to define an air gap between the first bus bar and the second bus bar;

wherein the air gap is substantially 5 millimeters.

17. The method according to claim 16 , wherein:

the first bus bar includes a first bushing having a height of substantially 5 millimeters; and

the second bus bar includes a conductor electrically connected to the first bushing;

wherein the air gap is the space between the first bus bar and the conductor.

18. The method according to claim 16 , further comprising:

connecting the second bus bar to an inverter; and

connecting the first bus bar to a capacitor.

19. The method according to claim 16 , wherein:

the first bus bar includes a second bushing having a height of approximately 1.8 millimeters.