Patent ID: 8519577

Claim:
A generator for supplying alternate current to an electrical grid, comprising: a stator, comprising: two end plates, a plurality of stator laminate plates arranged between the two end plates, and a plurality of cooling ducts, each cooling duct includes a duct inlet formed in a first of the two end plates, a cooling hole formed in each of the plurality of stator laminate plates and a duct outlet formed in the second of the two endplates, wherein for each cooling duct the duct inlet, the cooling holes and duct outlet are aligned such that the respective cooling duct provides a cooling path for a cooling liquid to travel from the duct inlet to the duct outlet via the cooling holes, each the plurality of cooling ducts are thereby formed by a material of the stator itself; a housing having a bottom; and a reservoir for holding the cooling liquid is located at the bottom of the housing, the reservoir connected to the duct inlet of at least one of the plurality of cooling ducts via a tubing, wherein the duct outlet of at least one of the plurality of cooling ducts is not attached to the reservoir so that the cooling liquid falls freely and unrestrained from said duct outlet into the reservoir thereby forming an open cooling circuit.