Patent ID: 6638030
Filing Date: 2003-10-28
Classification: F04C

Abstract:
A screw compressor comprising:a compressor main body; a male rotor having a screw-like male tooth shape and a female rotor having a screw-like female tooth shape meshing with the screw-like male tooth shape or the male rotor, the male and female rotors being provided within the compressor main body; a casing aligned in a longitudinal direction with and operably connected to the compressor main body; and a high speed electric motor provided within the casing, the motor comprising a motor rotor, a motor stator and a motor shaft for driving at least one of the male and female rotors; wherein a speed ratio of the motor shaft and the at least one of the male and female rotors driven by the motor shaft is in a range of 2:1 to 1:2.