Patented iPM compressor motor 'exceeds IE5' and cuts losses by up to 30%

摘要

THE COMPRESSOR-MAKER Atlas Copco has developed and patented an interior permanent magnet (iPM) motor which, it claims, has a higher efficiency than the IE5 "ultra premium efficiency" level. It is using the motor to drive the rotors in some of its compressors directly, resulting in energy savings of up to 30%. In an iPM motor, the magnets are embedded into the rotor, avoiding the risk of them becoming detached as can happen if PM motors using surface-mounted magnets run too fast. The iPM machines can therefore run at higher speeds, enabling direct coupling to the compression element with a 1:1 ratio.