PERMANENT MAGNET MOTOR FOR SUBSEA PUMP DRIVE

摘要

A subsea pump drive (10) employs a permanent magnet (PM) motor (12) to drive a subsea pump (40). The PM motor rotor in one embodiment is canned with a non-magnetic material such as inconel that can provide a desired level of corrosion protection The PM motor provides a subsea pump drive that is smaller and more efficient, having a high power factor than a subsea pump drive utilizing a conventional induction motor. The PM motor subsea pump drive eliminates the necessity for a topside storage tank and associated fluid transfer lines when the motor rotor is cooled with processed fluid.