Generator for a power plant

A generator for a power plant, comprising:

• a stator and a rotor, wherein the stator guides current conductors, and wherein the conductors form an end winding at at least one end of the stator, and
• a fan for cooling the end winding, wherein the fan generates a cooling air flow directed at the end winding, with an axial component and a radial component,
• wherein the fan has a first region, which generates a cooling air stream oriented axially with respect to a central axis of the rotor, and has a second region, which generates a cooling air stream oriented radially or diagonally with respect to the central axis of the rotor,
• wherein the fan has at least one fan blade, wherein the at least one fan blade has a first section which runs radially with respect to a central axis of the rotor, and has a second section which runs at an angle of 5° to 85°, preferably between 30° and 60°, with respect to the central axis of the rotor.

A generator for a power plant, comprising:

• a stator and a rotor, wherein the stator guides conductors, and wherein the conductors form an end winding at at least one end of the stator, and
• a fan for cooling the end winding, wherein the fan generates a cooling air flow directed at the end winding, with an axial component and a radial component,
• wherein the fan has a first region, which generates a cooling air stream oriented axially with respect to a central axis of the rotor, and has a second region, which generates a cooling air stream oriented radially or diagonally with respect to the central axis of the rotor,
• wherein the fan has a first impeller for generating an air stream axially with respect to a central axis of the rotor, and a second impeller for generating an air stream radially or diagonally with respect to the central axis of the rotor.

A method for cooling a generator with a stator and a rotor, wherein conductors are guided in the stator, wherein the conductors form an end winding at at least one end of the stator, and wherein the generator has a fan for cooling the end winding, the method comprising:

• generating a cooling air stream by the fan,
• wherein the end winding is cooled by a cooling air flow directed thereat and having an axial component and a radial component, wherein the fan has a first region, which generates a cooling air stream oriented axially with respect to a central axis of the rotor, and has a second region, which generates a cooling air stream oriented radially or diagonally with respect to the central axis of the rotor,
• wherein the fan has at least one fan blade,
• wherein the at least one fan blade has a first section which runs radially with respect to a central axis of the rotor, and has a second section which runs at an angle of 5° to 85° with respect to the central axis of the rotor, or
• wherein the fan has a first impeller for generating an air stream axially with respect to a central axis of the rotor, and a second impeller for generating an air stream radially or diagonally with respect to the central axis of the rotor.