Mechanical strength of connection of wound rotor generator/motor
A rotor of a wound rotor motor/generator comprising a plurality of rotor windings including a line rotor coil and a star rotor coil. The rotor coil couples to an L-conductor having an L-shaped profile such that a portion of the L-conductor extends from the line rotor coil toward the star rotor coil. A line connector bar couples the L-conductor to a rotor lead such that the line rotor coil is electrically coupled to the rotor lead. The star rotor coil couples to an L-support having an L-shaped profile such that a portion of the L-support extends from the star rotor coil toward the line rotor coil. An insulator is positioned between the L-conductor and the L-support to electrically insulate the L-support from the L-conductor. Lastly, an insulating rope couples the L-conductor to the L-support.
1. A rotor of a wound rotor motor/generator, the rotor comprising:
a plurality of rotor windings including a first rotor coil and a second rotor coil;
an L-conductor having an L-shaped profile and coupled to the first rotor coil such that a portion of the L-conductor extends from the first rotor coil toward the second rotor coil in a first circumferential direction;
a line connector bar coupling the L-conductor to a rotor lead such that the first rotor coil is electrically coupled to the rotor lead;
an L-support having an L-shaped profile and coupled to the second rotor coil such that a portion of the L-support extends from the second rotor coil toward the first rotor coil in a second circumferential direction, opposite the first circumferential direction, such that the L-support and the L-conductor are axially overlapped;
an insulator positioned between the L-conductor and the L-support to electrically insulate the L-support from the L-conductor; and
an insulating rope coupling the L-conductor to the L-support.
2. The rotor of claim 1 , wherein the L-conductor includes support blocks that define a plurality of gaps therebetween, wherein the insulating rope is positioned within the plurality of gaps.
3. The rotor of claim 1 , further comprising a support ring positioned radially within the plurality of rotor windings, the support ring coupled to the line connector bar to support the line connector bar during acceleration of the rotor.
4. The rotor of claim 3 , further comprising a fish plate coupled to the support ring and coupled to the line connector bar, such that the support ring is indirectly coupled to the line connector bar via the fish plate.
5. The rotor of claim 1 , wherein the L-conductor includes a first portion that is coupled to the first rotor coil, wherein the portion of the L-conductor that extends from the first rotor coil toward the second rotor coil is a second portion of the L-conductor, and wherein the second portion of the L-conductor extends transverse to the first portion of the L-conductor to define the L-shaped profile of the L-conductor.
6. The rotor of claim 5 , wherein the L-support includes a first portion that is coupled to the second rotor coil, wherein the portion of the L-support that extends from the second rotor coil toward the first rotor coil is a second portion of the L-support, and wherein the second portion of the L-support extends transverse to the first portion of the L-support to define the L-shaped profile of the L-support.
7. The rotor of claim 6 , wherein the second portion of the L-conductor is axially aligned with the first portion of the L-support and the second portion of the L-support is axially aligned with the first portion of the L-conductor such that the L-conductor is nested with the L-support.
8. The rotor of claim 1 , wherein the plurality of rotor windings includes a plurality of top coils and a plurality of bottom coils, the bottom coils being located radially within the top coils, wherein both of the first rotor coil and second rotor coil are top coils.
9. The rotor of claim 1 , wherein the L-conductor is soldered, brazed, or welded to the first rotor coil and wherein the L-support is soldered, brazed, or welded to the second rotor coil.
10. The rotor of claim 1 , wherein the L-support is an initial L-support, wherein the L-conductor and the L-support are positioned between the first rotor coil and the second rotor coil, the rotor further comprising a first plurality of additional L-supports coupled to the first rotor coil opposite the L-conductor, the rotor further comprising a second plurality of additional L-supports coupled to the second rotor coil opposite the initial L-support, such that the first and second pluralities of additional L-supports provide additional mechanical strength and rigidity to the rotor.