(under subclass 700) Subject matter wherein the motor includes a motor winding energized with alternating current by the system of supply and/or control to form a rotating magnetic field and (a) a rotor member of high magnetic retentivity which acquires a fixed magnetic field by induction from the energized winding and is thus attracted to the rotating field to rotate at the speed of the rotating field or (b) a rotor member which assumes a position of minimum magnetic reluctance with respect to the rotating magnetic field and, as a result of the magnetic field's rotation, rotates at the speed of the rotating magnetic field.
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254, for motor systems having a self-commutated motor in which the rotor tends to assume positions of minimum magnetic reluctance when energized.
