DC EXCITED FIELD TRANSVERSE FLUX MOTOR

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A three-phase transverse flux motor (20) has three stator assemblies (38-40) with hollow annular soft magnetic bases (36) containing ac coils (43). The rotor comprises four soft magnetic bases (68, 50-52, 69) and a plurality of interdigitated pairs of magnetic segment rings (59, 53; 54, 55; 56, 57; 58, 60) each secured to a pair of said bases centered on isolation ring (76) between the bases. Instead of permanent magnets, the rotor magnetic fields are provided by dc excitation coils (63, 46-48, 64). The flux from the dc excitation coils is applied to the stator annuli in an alternating north/ south fashion due to the interdigitated magnetic segments, thereby eliminating the need for expensive, rare earth permanent magnets on the rotor.