US 11,950,389 B2
Subsea variable speed drive apparatus
Ana Maria Guimarães Guerreiro, Rio de Janeiro (BR); Rodrigo Silva Cappato, Uppsala (SE); Anderson Moita Witka, Rio de Janeiro (BR); Lafaete Creomar Lima, Rio de Janeiro (BR); Eduardo Wong Cardoso, Rio de Janeiro (BR); Steven Kronemberger, Petrópolis (BR); Ola Jemtland, Oslo (NO); Ragnar Eretveit, Kongsberg (NO); Stein Følkner, Østerås (NO); and Torbjørn Strømsvik, Nesbru (NO)
Appl. No. 17/610,432
Filed by FMC Technologies Do Brasil Ltda., Rio de Janeiro (BR)
PCT Filed May 10, 2019, PCT No. PCT/BR2019/050175
§ 371(c)(1), (2) Date Nov. 10, 2021,
PCT Pub. No. WO2020/227789, PCT Pub. Date Nov. 19, 2020.
Prior Publication US 2022/0220835 A1, Jul. 14, 2022
Int. Cl. G06F 1/16 (2006.01); H01L 21/48 (2006.01); H01L 23/367 (2006.01); H01L 23/38 (2006.01); H02K 5/132 (2006.01); H02K 11/33 (2016.01); H05K 5/00 (2006.01); H05K 7/00 (2006.01); H05K 7/14 (2006.01); E21B 33/035 (2006.01); F04D 13/10 (2006.01)
CPC H05K 7/14337 (2022.08) [H01L 21/4871 (2013.01); H01L 23/367 (2013.01); H01L 23/38 (2013.01); H02K 5/132 (2013.01); H02K 11/33 (2016.01); E21B 33/0355 (2013.01); F04D 13/10 (2013.01)] 17 Claims
OG exemplary drawing
 
1. A subsea variable speed drive apparatus comprising:
a pressure resistant container comprising a curved wall section having a curved internal surface; and
a variable speed drive comprising at least one power electronics module arranged inside the container and held at a predetermined atmospheric pressure;
wherein the at least one power electronics module is mounted on a heatsink mounted on the internal surface, the heatsink comprising a curved surface contacting the internal surface and having a radius of curvature corresponding to a radius of curvature of the internal surface, the heatsink being fixedly attached to the internal surface so as to create a contact pressure between the heatsink and the internal surface, thereby providing efficient heat transfer from the heatsink to the container.