US 12,328,034 B2
Generator, wind turbine and method for cooling a direct drive generator of a wind turbine
Stefano Bove, Lunderskov (DK); Jens Bomholt Jensen, Horsens (DK); and Anders Vangsgaard Nielsen, Silkeborg (DK)
Assigned to SIEMENS GAMESA RENEWABLE ENERGY A/S, Brande (DK)
Filed by Siemens Gamesa Renewable Energy A/S, Brande (DK)
Filed on Jun. 2, 2022, as Appl. No. 17/830,451.
Claims priority of application No. 21178540 (EP), filed on Jun. 9, 2021.
Prior Publication US 2022/0399767 A1, Dec. 15, 2022
Int. Cl. H02K 1/20 (2006.01); H02K 9/10 (2006.01)
CPC H02K 1/20 (2013.01) [H02K 9/10 (2013.01); H02K 2201/03 (2013.01)] 14 Claims
OG exemplary drawing
 
1. A generator for a wind turbine having a rotor and a stator separated radially by an air gap, wherein the stator comprises at least one stator segment, which comprises a stack of lamination sheets and at least one stator winding, and a stator support structure supporting the at least one stator segment, wherein the generator further comprises a cooling arrangement for providing cooling fluid at least to the air gap,
wherein the cooling arrangement further comprises a cooling fluid flow dividing element for dividing an incoming cooling fluid flow to the stator into a first partial cooling fluid flow directed to a coil overhang and the air gap for cooling an air gap side of the at least one stator segment and a second partial cooling fluid flow directed to the stator support structure for cooling a non-air gap side of the at least one stator segment,
wherein both partial cooling fluid flows are completely separated over their whole cooling path, and
wherein the cooling fluid flow dividing element comprises at least one actuator controllable by at least one control device of the cooling arrangement for adjusting a distribution of the incoming cooling fluid flow to the partial cooling fluid flows.