US 11,742,722 B2
Cooling of electrical machines
Sadeo Ramtahal, Schenectady, NY (US); Andrew Thomas Cross, Niskayuna, NY (US); Rinaldo Luigi Miorini, Niskayuna, NY (US); Julio Cesar Urresty, Barcelona (ES); Cesar Muñiz Casais, Barcelona (ES); and Lakshminarayana Kanakamedala, Schenectady, NY (US)
Assigned to General Electric Renovables Espana, S.L., Barcelona (ES)
Filed by General Electric Renovables España, S.L., Barcelona (ES)
Filed on Jul. 15, 2021, as Appl. No. 17/376,666.
Claims priority of application No. 20382644 (EP), filed on Jul. 16, 2020.
Prior Publication US 2022/0021276 A1, Jan. 20, 2022
Int. Cl. H02K 9/22 (2006.01); H02K 9/02 (2006.01); F03D 9/25 (2016.01)
CPC H02K 9/227 (2021.01) [H02K 9/02 (2013.01); F03D 9/25 (2016.05); F05B 2220/706 (2013.01); F05B 2260/2241 (2013.01)] 14 Claims
OG exemplary drawing
 
1. An electrical machine, comprising:
a rotor and a stator;
an air gap defined between the rotor and the stator; and
one of the stator or the rotor comprising a plurality of electrical coils,
wherein at least one electrical coil of the plurality of coils comprises a heat sink to dissipate heat to the air gap,
wherein the heat sink is attached to the at least one electrical coil with a thermally conductive material,
wherein a temperature distribution of the at least one electrical coil is more homogeneous with the heat sink attached than without the heat sink attached and a difference between a highest temperature and a lowest temperature of the at least one electrical coil is less than 20° C. with the heat sink attached.