Patent ID: 9413198
Filing Date: 2016-08-09
CPC Classification: H02K,Y02E

Claim Text:
1. A synchronous brushless, permanent magnet-less electric machine comprising: a stator, a rotor, two stationary flux exciters, said rotor is essentially the shape of a right circular cylinder comprising two flat sides and a curved surface, the rim of said rotor consists of non-magnetic material whereas said rotor comprises a coaxial hub consisting of a material sufficient to transmit torque to said shaft whereas said hub comprises a well and whereas said well comprises an opening through which said shaft is attached, a plurality of evenly spaced poles consisting of soft magnetic material are evenly spaced around said rim, the length of said poles is equal to the distance between the flat sides of said rotor minus a wide gap, said wide gaps are long enough to present high reluctance sufficient to block flux flow, said poles are arranged such that adjacent said poles have flush ends at opposite flat sides of said rotor, the flat sides of said outer rim are disposed between the two stationary flux exciters at a distance small enough to create two axial air gaps with reluctance small enough to permit flux to flow readily to nearby said flush ends of said pole ends, so that adjacent poles are of opposite magnetic polarity, said stationary flux exciters comprise a high permeability core and an electrical winding to energize said core to a high permeable flux return attached to said stationary flux exciter, said stator is disposed around said curved side of said rotor so as to form a radial air gap with reluctance small enough to permit flux flow.