Wound rotor for wind turbine generators
AssigneeTimken Gears & Services Inc.
InventorsRandall W. Russell, Jan H. de Swardt
Life of this patent
Estimating the term…
Abstract
A wound rotor for use in an electric machine. The wound rotor includes a winding overhang portion and a connection ring formed of a plurality of rectangular cross-section conductor sections connected in parallel, the connection ring disposed underneath the winding overhang portion. The wound rotor further includes a first plurality of conductor coils extending from the winding overhang portion and forming a star connection with the connection ring and a second plurality of conductor coils extending from the winding overhang portion to form a line connection.
Claims19
A wound rotor for use in an electric machine, the wound rotor comprising:
- a winding overhang portion;
- a connection ring formed of a plurality of rectangular cross-section conductor sections connected in parallel, the connection ring disposed underneath the winding overhang portion;
- a first plurality of conductor coils extending from the winding overhang portion and directly forming a star connection with the connection ring;
- and
- a second plurality of conductor coils extending from the winding overhang portion to form a line connection.
A method for constructing a wound rotor for use in an electric machine, the method comprising:
- extending a plurality of conductor coils out of a winding overhang portion;
- forming a star connection directly between the plurality of conductor coils and a connection ring;
- after forming the star connection, individually wrapping each one of the plurality of conductor coils with an insulating material;
- after forming the star connection, wrapping the connection ring with the insulating material;
- moving the wrapped connection ring to a position underneath the winding overhang portion;
- and
- securing the position of the wrapped connection ring underneath the winding overhang portion by binding the connection ring to the winding overhang portion with woven glass cloth or tape.
A method for refurbishing an existing wound rotor for use in an electric machine, the method comprising:
- at least partially disassembling the existing wound rotor to provide access to a winding overhang portion of the existing wound rotor;
- extending a plurality of conductor coils out of the winding overhang portion;
- forming a connection directly between the plurality of conductor coils and a connection ring;
- after forming the connection, individually wrapping each one of the plurality of conductor coils with an insulating material;
- after forming the connection, wrapping the connection ring with the insulating material;
- repositioning the wrapped connection ring from a location outside of the winding overhang portion to a location underneath the winding overhang portion;
- and
- securing the position of the wrapped connection ring underneath the winding overhang portion by binding the connection ring to the winding overhang portion with woven glass cloth or tape.
Dependencies are inferred from the claim text.