CPC H02K 21/042 (2013.01) [H02K 1/2706 (2013.01); H02K 1/2766 (2013.01); H02K 21/046 (2013.01); H02K 21/14 (2013.01)] | 20 Claims |
1. An electric machine, comprising:
a rotor having an outer surface, an inner surface opposite of the outer surface, and a rotor body defined between the outer surface and the inner surface;
a plurality of permanent magnets embedded within the rotor body, wherein at least one of the plurality of permanent magnets produces a constant magnet field having a magnetic axis along a direct axis (D-axis); and
a plurality of excitable electromagnets embedded within the rotor body, wherein at least one of the plurality of excitable electromagnets, when excited, produces a variable magnetic field having a magnetic axis offset from the D-axis; and
wherein the plurality of permanent magnets includes an inner pair of permanent magnets arranged in a V-shape configuration and spaced from one of the plurality of excitable electromagnets by a rotor air-gap.
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