motor - compressor with internship impellers integrated in the motor - use

摘要

A shaftless motor-compressor is disclosed, comprising a casing and at least one compressor stage arranged in the casing. Each compressor stage comprises a respective impeller arranged for rotation in the casing around a rotation axis. Each impeller is combined with an embedded electric motor housed in the casing and comprised of a motor stator and a motor rotor. The motor stator of each compressor stage circumferentially surrounds the impeller and the motor rotor, integral with the impeller. The motor rotor of each stage is arranged inside the respective motor stator.