Patent ID: 7034498

Claim:
An integrated electric motor and drive, comprising: a motor including a stator and a rotor which define an energy storage gap therebetween, the stator including three stator coils and the rotor being supported within the motor to rotate relative to the three stator coils; an energy storage capacitor coupled in series with the three stator coils and the energy storage gap to form a resonant LCR circuit; a rotary shaft encoder configured to detect a rotational position of the rotor with respect to the three stator coils; and a switch controller configured to energize the three stator coils based on the rotational position of the rotor as detected by the rotary shaft encoder, the three stator coils being energized at one-third duty cycle such that the rotor field is normal to the stator field by about 90° and no two stator coils are energized simultaneously.