Wind turbine with improved cooling

A wind turbine comprising:

• a wind turbine tower;
• a nacelle provided on the wind turbine;
• a wind turbine rotor hub rotatably mounted at the nacelle, the wind turbine rotor hub having one or more wind turbine blades mounted thereon;
• a shaft coupled to the wind turbine rotor hub, and
• a generator coupled to the shaft and which comprises a rotor arranged rotably in relation to a stator, wherein the rotor comprises one or more superconducting rotor coils, wherein the stator comprises one or more stator coils of a conductive material, and wherein the rotor coil and the stator coil being arranged to have interacting magnetic fields for inducing a current in the stator coil when the rotor is rotated, and
• wherein the stator coils are arranged in a stator chamber inside a stator housing in which a stator iron separates the stator chamber into a first chamber and a second chamber, wherein the stator iron and at least a part of the stator coils are thermally coupled by at least one first type of cooling channel positioned adjacent to at least one of the stator coils, wherein at least the first type of cooling channel provides a fluid transfer between the first chamber and the second chamber, and wherein at least the first type of cooling channels are configured to guide a coolant for conducting heat away from the stator coils,
• characterised in that
• the stator coil is arranged along an inner periphery of the stator iron and at least one second type of cooling channel is arranged along an outer periphery of the stator iron (504), and
• one or more interconnecting pipes, each of which is configured to be coupled to at least two of the cooling channels, are arranged in either the first chamber or the second chamber.