Magnetic loops closure elements for electric motor

An electric motor including a stator having a plurality of radially extending magnetically soft iron elements forming pole teeth having portions of greater and lesser diameters, a rotor at one axial end of said pole teeth adapted to conduct magnetic flux between said pole teeth, and a magnetic closure loop element at the opposite axial end of said pole teeth than said rotor having portions thereof which are associated with portions of said pole teeth;

• the improvement comprising in that the cross-sectional areas of a portion of said closure loop element associated with a portion of said pole teeth of greater diameter is greater than the cross-sectional area of a portion of said closure loop element associated with a portion of said pole teeth of lesser diameter.