Rotor winding directly cooled by liquid for use in non-salient pole synchronous machine

Claim 2

A rotor winding directly cooled by liquid, for use in the slots of a rotor of a non-salient pole synchronous machine, said rotor winding comprising pole windings including one group of concentrically disposed coils wound in one and the same direction of each pole and a second group of concentrically disposed coils wound in one and the same direction of each pole, said second group of coils being disposed in the same slots as said first group of coils, lead-outs for said coils of both groups arranged axially at one side of the rotor and extending beyond the end portions thereof, said coils of one group being disposed in the lower portions of the slots nearest to the rotor axis while said coils of the other group are disposed in the upper portions of the slots nearest to the outer surface of the rotor, the coils of each pole being in electrical series connection by alternately switching-in one coil of each group beginning with the smallest coil in one group and the largest coil in the other group, and means interconnecting the lead-outs of the coils.

Claim 3

A rotor winding directly cooled by liquid, for use in the slots of a rotor of a non-salient pole synchronous machine, said rotor winding comprising pole windings including one group of concentrically disposed coils wound in one and the same direction of each pole and a second group of concentrically disposed coils wound in one and the same direction of each pole, said second group of coils being disposed in the same slots as said first group of coils, lead-outs for said coils of both groups arranged axially at one side of the rotor and extending beyond the end portions thereof, said coils of one group being disposed in the lower portions of the slots nearest to the rotor axis while said coils of the other group are disposed in the upper portions of the slots nearest to the outer surface of the rotor, the coils of each pole being in electrical series connection by alternately switching-in one coil of each group beginning with the smallest coil in one group and the largest coil in the other group, and means interconnecting the lead-outs of the coils.

Claim 4

A rotor winding directly cooled by liquid, for use in the slots of a rotor of a non-salient pole synchronous machine, said rotor winding comprising pole windings including one group of concentrically disposed coils wound in one and the same direction of each pole and a second group of concentrically disposed coils wound in one and the same direction of each pole, said second group of coils being disposed in the same slots as said first group of coils, lead-outs for said coils of both groups arranged axially at one side of the rotor and extending beyond the end portions thereof, said coils of one group being disposed in the lower portions of the slots nearest to the rotor axis while said coils of the other group are disposed in the upper portions of the slots nearest to the outer surface of the rotor, the coils of each pole being in electrical series connection by alternately switching-in one coil of each group beginning with the smallest coil in one group and the largest coil in the other group, and means interconnecting the lead-outs of the coils.

Claim 5

A rotor winding according to claim 1 wherein the means interconnecting the lead-outs comprises a direct connection therebetween.

Claim 6

A rotor winding according to claim 1 wherein the means interconnecting the lead-outs comprises radial jumpers of solid cross-section.

Claim 7

A rotor winding according to claim 1, in which the coils of the second group are wound in a direction opposite to that of the winding of the coils of the first group.

Claim 8

A rotor winding according to claim 1, in which the leaD-outs are in upper and lower disposition, the upper and lower lead-outs of the upper coils extending axially and disposed coaxially relative to the respective conductors adjacent to the lead-outs in the slots, the upper and lower lead-outs of the lower coils, on coming out of the slots, extending along the end portions of their coils and axially extending beyond the end portion in the sectors of disposition of the respective upper and lower lead-outs of like polarity of the upper coils.

Claim 9

A rotor winding according to claim 1, in which turn-to-turn transitions of the lower coils, formed by the displacement of all the conductors of these coils in the radial direction towards the axis of the rotor over the height of a conductor are disposed at the point where the lower leadout of the coils comes out of the slot, and along the axial portion of the end portion of the smallest lower coil.

Claim 10

A winding of a bipolar rotor according to claim 1, comprising an inter-pole connection in the zone of an axial portion of the end portion at the side of the lead-outs of the coils including, at least, two jumpers of solid cross section, each jumper connecting the upper conductor adjacent to the lead-out of the largest upper coil of one pole with the adjacent upper conductor of the largest upper coil of the other pole.

Claim 11

A rotor winding according to claim 1, in which the electric and hydraulic connections of the lead-outs of the coils are disposed in the direct vicinity of the end portion, and comprising a retaining ring common for the winding and the connections to prevent radial displacement.

Claim 12

A rotor winding directly cooled by liquid, for use in the slots of a rotor of a non-salient pole synchronous machine, said rotor winding comprising pole windings including one group of concentrically disposed coils each wound in one and the same direction for each pole and a second group of concentrically disposed coils each wound in one and the same direction for each pole, said second group of coils being disposed in the same slots as said first group of coils, lead-outs for said coils of both groups arranged axially at one side of the rotor in radially juxtaposed rows and extending beyond the end portion thereof, said coils of one group being electrically insulated from the coils of the other group and disposed in the lower portions of the slots nearest to the rotor axis while said coils of the other group are superposed on the coils of said one group and disposed in the upper portions of the slots nearest to the outer surface of the rotor, said lead-outs of the upper coils being arranged in rows as upper and lower lead-outs extending axially from the slots and disposed coaxially relative to respective coils in the slots adjacent the lead-outs, the lead-outs of the lower coils also being arranged in rows as upper and lower lead-outs and extending from end portions of the coils, the lower coils having turn-to-turn transitions formed by the displacement of all the conductors of these coils in the radial direction towards the axis of the rotor over the height of one conductor, said turn-to-turn transitions being disposed at the point where the lower lead-outs of the lower coils come out of the slots along an axial portion of the length thereof.

Claim 13

A rotor winding directly cooled by liquid, for use in the slots of a rotor of a non-salient pole synchronous machine, said rotor winding comprising pole windings including one group of concentrically disposed coils each wound in one and the same direction for each pole and a second group of concentrically disposed coils each wound in one and the same direction for each pole, said second group of coils being disposed in the same slots as said first group of coils, lead-outs for said coils of both groups arranged axially at one side of the rotor in radially juxtaposed rows and extending beyond the end portion thereof, said coils of one group being electrically insulated from the coils of the other group and disposed in the lower portions of the slots nearest to the rotor axis while said coils of the other group are superposed on the coils of said one group and disposed in the upper portions of the slots nearest to the outer surface of the rotor, said lead-outs of the upper coils being arranged in rows as upper and lower lead-outs extending axially from the slots and disposed coaxially relative to respective coils in the slots adjacent the lead-outs, the lead-outs of the lower coils also being arranged in rows as upper and lower lead-outs and extending from end portions of the coils, the lower coils having turn-to-turn transitions formed by the displacement of all the conductors of these coils in the radial direction towards the axis of the rotor over the height of one conductor, said turn-to-turn transitions being disposed at the point where the lower lead-outs of the lower coils come out of the slots along an axial portion of the length thereof.

Claim 14

A rotor winding according to claim 9, in which the coils of the second group are wound in a direction opposite to that of the winding of the coils of the first group.

Claim 15

A rotor winding according to claim 9 wherein the coils of each pole are in electrical series connection by alternately switching-in one coil of each group beginning with the smallest coil in one group and the largest coil in the other group, and means interconnecting the lead-outs of the coils.

Claim 16

A winding of a bipolar rotor according to claim 9, comprising an inter-pole connection in the zone of an axial portion of the end portion at the side of the lead-outs of the coils including, at least, two jumpers of solid cross section, each jumper connecting the uPper conductor adjacent to the lead-out of the largest upper coil of one pole with the adjacent upper conductor of the largest upper coil of the other pole.