Patent ID: 8390168
Filing Date: 2013-03-05
Classification: H02K

Abstract:
1. A permanent magnet-less, brushless synchronous system comprising: a stator that generates a magnetic rotating field when sourced by an alternating current; an uncluttered rotor disposed within the magnetic rotating field and spaced apart from the stator to form an air gap relative to an axis of rotation; and a stationary excitation core spaced apart from the uncluttered rotor by an axial air gap and a radial air gap, where the uncluttered rotor comprises a plurality of rotor pole stacks configured to have quadrature flux paths, the flux paths being partially bounded by dielectric channels passing through each of the plurality of rotor pole stacks, and where the stator comprises a plurality of teeth juxtaposed in an axial direction, the teeth including a return path for interconnecting the teeth to a plurality of alternating phases.