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.