A generator for use in a wind turbine

Abstract

A generator rotor for a wind turbine, comprising a cylindrical ring structure defining a radially inner surface and a central hollow portion, and being arranged to rotate around a rotational axis. The cylindrical ring structure comprise a plurality of ring-shaped permanent magnet packages arranged coaxially around the rotational axis, the plurality of permanent magnet packages being adapted to form at least one coolant passage through the cylindrical ring structure. The cylindrical ring structure is adapted to serve as a sump for coolant, such that the sump is defined, at least in part, by the radially inner surface of the cylindrical ring structure, and further comprises at least one coolant passage inlet that extends from the radially inner surface of the cylindrical ring structure to the at least one coolant passage and wherein at least one coolant passage outlet is arranged at one axial end of the cylindrical ring structure.

Dependencies are inferred from the claim text.