Patent ID: 7067950

Claim:
An electro-magnetic device comprising: (a) at least one stator assembly including a unitary magnetic core formed from a low-loss soft-magnetic material, wherein said unitary magnetic core includes a number of slots, and wherein said slots are wound with stator windings; and (b) at least magnetic field assembly including a plurality of poles, said magnetic field assembly arranged and disposed for magnetic interaction with the at least one stator, wherein the low loss soft-magnetic material is characterized by a core loss less than “L” where L is given by the formula L=12·f·B 1.5 +30·f 2.3 ·B 2.3 , where L is the loss in W/kg, f is the frequency in KHz, and B is the magnetic flux density in peak Tesla; and wherein a frequency of said electro-magnetic device is higher than 300 Hz during operation of the device.