Motors for Cryogenic Applications

Applications / Motors for Cryogenic Applications

e+a Elektromaschinen und Antriebe AG has been supplying motor elements for operation in cryogenic pumps (2.5kW – 250kW) since 2013.

Design Challenges:

Electrical insulation and durability
Frictional losses when operating in liquids
Rotor sleeve design for permanent magnet retention

Expertise:

Operation of e+a rotors & stators immersed in liquid natural gas (LNG, -160 ° C) and liquid nitrogen (LN, -196 ° C)
Testing of different materials for operation in cryogenic liquids
New rotor manufacturing variant developed and successfully tested.
Evaluation of increased power density in cryogenic liquids

Based on experience gained in the LNG and LN markets, e+a is now taking the next steps to develop and manufacture motor elements for operation in liquid hydrogen (LH2, -253 ° C). Test results still pending.