Power transmission assembly

1. A power transmission assembly, comprising:

a first main bus including a first large bus bar and a first small bus bar, the first main bus and the first large bus bar and the first small bus bar configured to transmit a first phase of a power signal, the first large bus bar defined by a cross-sectional area larger than the first small bus bar, the first main bus defining a first axis passing through the first large bus bar and the first small bus bar; and

a second main bus including a second large bus bar and a second small bus bar, the second main bus and the second large bus bar and the second small bus bar configured to transmit a second phase of the power signal, the second main bus defining a second axis passing through the second large bus bar and the second small bus bar, the second axis being substantially parallel to the first axis, and the first main bus being located along a third axis substantially perpendicular to the first axis and passing through each of the first main bus and the second main bus.

2. The power transmission assembly of claim 1 , wherein the second large bus bar is offset from the first large bus bar in a first direction parallel to the first and second axes.

3. The power transmission assembly of claim 1 , wherein a combined cross-sectional area of the first large bus bar and the first small bus bar is the same as a combined cross-sectional area of the second large bus bar and the second small bus bar.

4. The power transmission assembly of claim 1 , further comprising:

a third main bus including a third large bus bar and a third small bus bar, the third main bus and the third large bus bar and the third small bus bar configured to transmit a third phase of the power signal, the third main bus located beneath the first main bus and the second main bus, the third main bus defining a fourth axis passing through the third large bus bar and the third small bus bar, the fourth axis being parallel to the first axis and the second axis, and the third main bus being located along the third axis perpendicular to the first axis and passing through each of the first main bus, the second main bus and the third main bus.

5. The power transmission assembly of claim 4 , further comprising:

a motor connected to the first main bus, the second main bus and the third main bus, the motor configured to receive a three-phase power signal from the first main bus, the second main bus and the third main bus.

6. The power transmission assembly of claim 1 , wherein the first main bus further comprises a fourth large bus bar and a fourth small bus bar,

the second main bus further comprises a fifth large bus bar and a fifth small bus bar, and

each of the first and fourth large bus bars of the first main bus is offset from each of the second and fifth large bus bars of the second main bus in a first direction parallel to the first and second axes.

7. The power transmission assembly of claim 6 , wherein the first and fourth lame bus bars and first and fourth small bus bars of the first main bus are arranged symmetrically about a fifth axis parallel to the third axis, and

the second and fifth large bus bars and second and fifth small bus bars oldie second main bus are arranged symmetrically with respect to the fifth axis.

8. The power transmission assembly of claim 1 , further comprising:

a first auxiliary bus connected to the first main bus; and

a second auxiliary bus connected to the second main bus, the first and second auxiliary buses configured to connect the first and second main buses to one of a power source and a power-consuming, device.

9. The power transmission assembly of claim 8 , wherein the first auxiliary bus includes first and second auxiliary bus bars configured to physically contact different main bus bars of the first main bus; and

the second auxiliary bus includes third and fourth auxiliary bus bars configured to physically contact different main bus bars of the second main bus.

10. The power transmission assembly of claim 1 , wherein the first and second large bus bars and first and second small bus bars each have a cross-sectional shape corresponding to one of a circle, a square and an “L”.

11. A power transmission apparatus, comprising:

a first main bus including a first plurality of bus bars including at least one first large bus bar and at least one first small bus bar, the first main bus and the at least one first large bus bar and the at least one first small bus bar configured to transmit a first phase of a power signal, the large and small sizes defined by a cross-sectional area of the bus bars, the first main bus defining a first axis passing through each of the first plurality of bus bars; and

a second main bus including a second plurality of bus bars including at least one second large bus bar and at least one second small bus bar, the second main bus and the at least one second large bus bar and the at least one second small bus bar configured to transmit a second phase of the power signal, the second main bus defining a second axis passing through each of the second plurality of bus bars, the second axis being substantially parallel to the first axis, and the first main bus and the second main bus arranged such that a third axis substantially perpendicular to the first and second axes passes through each of the first main bus and the second main bus.

12. The power transmission apparatus of claim 11 , wherein a combined cross-sectional area of the at least one first large bus bar and the at least one first small bus bar is the same as a combined cross-sectional area of the at least one second large bus bar and the at least one second small bus bar.

13. The power transmission apparatus of claim 11 , further comprising:

a third main bus including a third plurality of bus bars including at least one third large bus bar and at least one third small bus bar, the third main bus and the at least one third large bus bar and the at least one third small bus bar configured to transmit a third phase of the power signal, the third main bus defining as fourth axis passing through each of the third plurality of bus bars, the fourth axis being parallel to the first axis, and the third main bus arranged such that the third axis passes through the third main bus.

14. The power transmission apparatus of claim 11 , further comprising:

a first auxiliary bus connected to the first main bus; and

a second auxiliary bus connected to the second main bus, the first and second auxiliary buses configured to connect the first and second main buses to one of a power source and a power-consuming device.

15. The power transmission apparatus of claim 11 , wherein the first and second large bus bars and first and second small bus bars each have a cross-sectional shape corresponding to one of a circle, a square and an “L”.

16. The power transmission assembly of claim 2 , wherein the first large bus bar is located above the second large bus bar, and the offset between the first large bus bar and the second large bus bar in the first direction parallel to the first and second axes defines a space above the second larger bus bar and adjacent to the first larger bus bar, and wherein a flow of heat generated second larger bus bar is vented parallel, to the first axis and dissipated the space.

17. The power transmission system of claim 11 , wherein the first large bus bar is located above the second large bus bar, and the offset between the first large bus bar and the second large bus bar in the first direction parallel to the first and second axes defines a space above the second larger bus bar and adjacent to the first larger bus bar, and wherein a flow of heat generated second larger bus bar is vented parallel to the first axis and dissipated the space.