Rotor with a coil arrangement and a winding carrier
Various embodiments include a rotor for an electric machine comprising: an electric coil arrangement; and a winding carrier mechanically carrying the coil arrangement and at least partially enclosing the coil arrangement on a radially outer side of the coil arrangement. The rotor includes an inner cavity for circulating a fluid coolant such that the coil arrangement comes into contact with the liquid coolant on its radially inner side as the rotor rotates.
1. A rotor for an electric machine, the rotor comprising:
two electric coil arrangements;
a respective winding carrier radially exterior to each of the two coil arrangements and at least partially enclosing the respective coil arrangement on a radially outer side of the respective coil arrangement; and
a common support extending between the two coil arrangements to support both of the respective winding carriers from a radially inward direction;
wherein the rotor includes an inner cavity for circulating a fluid coolant such that the liquid coolant comes into direct contact with a radially inner side of each of the two coil arrangements as the rotor rotates.
2. The rotor as claimed in claim 1 , wherein the two electric coil arrangements each comprise a superconducting conductor material.
3. The rotor as claimed in claim 1 , further comprising more than two coil arrangements;
wherein each of the more than two coil arrangements is arranged in a respective winding carrier with exactly one other coil arrangement.
4. The rotor as claimed in claim 1 , further comprising an additional support element skeleton supporting the winding carrier from a radially inward direction.
5. The rotor as claimed in claim 4 , further comprising a plurality of cavities adjoining, on their radially inner side, the support element and, on their radially outer side, the coil arrangement and/or the winding carrier.
6. The rotor as claimed in claim 1 , further comprising a binding band fixing the winding carrier in the rotor.
7. The rotor as claimed in claim 1 , wherein the liquid coolant comprises hydrogen.
8. The rotor as claimed in claim 1 , further comprising an electrically conductive damping screen radially surrounding the coil arrangement.
9. The rotor as claimed in claim 1 , wherein the winding carrier is iron-free.
10. The rotor as claimed in claim 1 , wherein the rotor has an average density of no more than 8 g/m3 over a total volume of the rotor.
11. An electric machine comprising:
a fixed stator; and
a rotor comprising:
two electric coil arrangements;
a respective winding carrier radially exterior to each of the two coil arrangements and at least partially enclosing the respective coil arrangement on a radially outer side of the respective coil arrangement; and
a common support extending between the two coil arrangements to support both of the respective winding carriers from a radially inward direction;
wherein the rotor includes an inner cavity for circulating a fluid coolant such that the liquid coolant comes into direct contact with a radially inner side of each of the two coil arrangements as the rotor rotates.
12. The electric machine as claimed in claim 11 , wherein the electric machine generates a power density of at least 5 KW/kg.
13. The electric machine as claimed in claim 11 , wherein the electric machine generates a nominal power of at least 5 MW.
14. The electric machine as claimed in claim 11 , wherein the rotor spins at a speed of at least 1000 revolutions per minute.
15. The rotor as claimed in claim 1 , further comprising a cryostat wall radially surrounding the coil arrangement.
16. A rotor for an electric machine, the rotor comprising:
an electric coil arrangement;
a winding carrier radially exterior to the coil arrangement and at least partially enclosing the coil arrangement on a radially outer side of the coil arrangement;
a first support element skeleton extending along a first side of the coil arrangement to support the winding carrier from a radially inward direction;
a second support element skeleton extending along an opposite side of the coil arrangement supporting the winding carrier from a radially inward direction; and
an inner cavity adjoining, on a radially inner side, the first support element skeleton and the second support element skeleton and, on a radially outer side, the coil arrangement and/or the winding carrier;
wherein the inner cavity provides a volume for circulating a fluid coolant such that the liquid coolant comes into direct contact with a radially inner side of the coil arrangement as the rotor rotates.