Bipolar induction electric machine

A bipolar induction electric machine comprising:

• a stator arrangement comprising a plurality of circumferentially arranged stator modules, each stator module comprising a plurality of axially arranged spaced apart stator pole elements fitted with a concentrated armature winding and terminating in an inwardly facing, curved stator pole surface, with the plurality of circumferentially arranged stator modules thus defining a plurality of inwardly facing, curved stator pole surfaces;
• and
• a rotor arrangement rotatably and concentrically accommodated within the stator arrangement, the rotor arrangement comprising a plurality of axially arranged rotor modules, each rotor module comprising at least one circumferentially arranged, curved bi-polar member comprising a pair of curved rotor pole elements that are axially displaced on either side of a stationary concentric field exciter coil accommodated between adjacent stator pole elements within the stator arrangement, with each bi-polar member having a corresponding spaced apart pair of stator pole surfaces, so that each rotor pole element lines up with a corresponding stator pole element,
• with the curved rotor pole elements being concentrically arranged relative to the stator pole surfaces so as to define a uniform air-gap therebetween and thus provide a plurality of axially segmented multipolar flux circuits, with the axial dimension of each rotor pole element varying in a manner so as to vary the overlap between the rotor pole element and the stator pole surface during rotation of the rotor arrangement, thus inducing a predetermined emf waveform in the armature winding of the stator pole elements.