Abstract: An axial field motor/generator having a rotor that includes at least three annular discs magnetized to provide multiple sector-shaped poles. Each sector has a polarity opposite that of an adjacent sector, and each sector is polarized through the thickness of the disc. The poles of each magnet are aligned with opposite poles of each adjacent magnet. Metal members adjacent the outermost two magnets contain the flux. The motor/generator also has a stator that includes a stator assembly between each two adjacent magnets. Each stator assembly includes one or more conductors or windings. Although the conductors may be formed of wire having a round, uniform cross-section, they may alternatively be formed of conductors having a tapered cross-section that corresponds to the taper of the sectors in order to maximize the density of the conductor in the gap between axially adjacent poles. The conductors may also alternatively be formed of traces in a printed circuit, which may have one or more layers.

Abstract: A combined power system includes an active power source and an auxiliary power source. The rotation speed signal of the active power source and the rotation torque difference between the active power source and an output shaft of the combined power system is used as a basis for controlling the auxiliary power source to provide proportional auxiliary speed driving, or proportional auxiliary torque driving, or reverse damping from regenerative braking.

Abstract: The synchronous motor comprises an armature having a plurality of teeth solid with a yoke and spaced apart by slots in which coils are accommodated. An inductor comprising a plurality of magnets borne by a sole is spaced from the armature by an air-grap. The motor is so dimensioned that the teeth of the armature have a constant cross-section over their entire height and the width of the slots alongside the tooth heads is substantially equal to the width of these heads to minimize the parasitic reluctant effect due to the slots. The motor may be linear or rotary.