Patent ID: 7548008
Filing Date: 2009-06-16
Classification: F03D,F05B,H02K,Y02E

Abstract:
1. A ship propulsion motor comprising: at least one rotor with an inner rotor core comprising a plurality of first permanent magnets and an outer rotor core comprising a plurality of second permanent magnets; and at least one double-sided stator with an inner stator side comprising a plurality of inner stator windings and an outer stator side comprising a plurality of outer stator windings, the inner stator side and the outer stator side comprising a double-sided lamination stack, wherein the at least one double-sided stator is concentrically disposed between the inner rotor core and the outer rotor core of the motor, wherein the inner stator side and the outer stator side together with the inner rotor core and the outer rotor core define at least two concentric air gaps, wherein the at least one double-sided stator and inner and outer rotor cores are configured to create a closed magnet flux path that flows radially through the double-sided stator to each of said permanent magnets and circumferentially in each of the inner and outer rotor cores and wherein the at least one rotor and at least one double-sided stator cooperate to produce at least 7,000 horsepower (9,387 Kilowatts).