An axial gap dynamoelectric machine comprises first and second stators disposed
coaxially with an intermediate rotor. The stators are selectively aligned with
an axial offset between the positions of their respective teeth and slots. The
stators comprise toroidal cores having laminated layers composed of a material
selected from the group consisting of amorphous and nanocrystalline metals and
optimized Fe-based alloy. Optionally, the machine further comprises misalignment
means for adjusting the offset of the stators. Adaptive adjustment permits the
machine to be operated to in a mode that reduces the back EMF of the motor, allowing
constant voltage to be maintained as speed is increased. Reducing back EMF also
allows a wider range of operating speed, especially in combination with use of
high pole counts. Alternatively, the machine can be operated, e.g. at lower speed,
in a constant torque mode. The machine may exploit the high pole count achievable
by use of improved soft magnetic materials. Also provided are techniques for reducing
torque ripple during operation, and also for using the stator offset in combination
with a dual full wave bridge rectifier arrangement.