Patent ID: 9595857
Date: 2017-03-14
CPC Classifications: H02K

Claim:
1. An electrical machine comprising a stator and a member arranged to move relative to said stator in a direction of relative motion, the stator comprising a first stator structure incorporating a first plurality of windings disposed along the direction of relative motion and displaced from the movable member in a direction perpendicular to the direction of relative motion, and a second stator structure incorporating a second plurality of windings displaced in a second direction from the movable member, so that the movable member lies between the two stator structures, the movable member being arranged to electrically couple with the windings, wherein the first plurality of windings includes a single phase winding having a pole pitch, the second plurality of windings includes a single phase winding of the same pole pitch being displaced in said direction of relative motion from first plurality of windings, wherein the displacement of the second plurality of windings with respect to the first is half of one pole pitch in said direction of relative motion, and wherein each stator structure comprises slotted laminations having a respective group of slots for each pole of the respective single phase winding, and wherein the groups of said first stator structure are displaced in the direction of relative motion from the groups of said second stator structure.