Hybrid-energized electric machine

A hybrid-energized electric machine comprising:

• a) a magnetic yoke;
• b) a stator winding:
• c) a laminated stator core being disposed in the magnetic yoke and supporting the stator winding;
• d) a rotor shaft;
• e) a rotor being divided axially into a first rotor half and a second rotor half, forming a space therebetween, said first rotor half including:
• (i) a first permanent magnet having a first polarity (N);
• (ii) a first plurality of permanent field poles that are energized by the first permanent magnet;
• and
• (iii) a first plurality of non-energized poles that are not energized by the first permanent magnet, wherein the first plurality of permanent field poles and the first plurality of non-energized poles are interspersed according to pole pitch;
• and
• said second rotor half including:
• (i) a second permanent magnet having a second polarity (S);
• (ii) a second plurality of permanent field poles that are energized by the second permanent magnet;
• and
• (iii) a second plurality of non-energized poles that are not energized by the second permanent magnet, wherein the second plurality of permanent field poles and the second plurality of non-energized poles are interspersed according to pole pitch, and the first and second plurality of permanent field poles are offset with respect to each other by one pole pitch;
• f) an electric field ring coil, wherein said first and second rotor halves are arranged on said rotor shaft with an axial distance between them;
• and
• g) a field coil being disposed into said space formed between said first and second rotor halves.