A.C. Tesla bifilar ferrite rotor attraction motor.

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The A.C. motor controller's complete; Next, we need to deliver an A.C. signal to the bifilar coil. A quick and dirty solution involves the audio frequency generator anyone can download off the internet. An audio amplifier needs to be connected to the PC program to regulate the amperage. That leaves the bifilar coil, rotor and bearing. The only remaining problem is to determine the self resonating frequency of the bifilar. It's easy to fish for, you can actually hear it start to audibly ring when you hit it. That frequency in Hertz stays fixed. The A.C. relay can only handle 12 amps at 120 volts, the maximum power. That's around 2 horsepower.

Now the motor has two controls: One for speed on the IC controller, and the other for torque on the amplifier. This motor design would be powerful and sophisticated enough to run an airplane, except the extension cord might get in the way. 

Let's measure the advantages: One , the coil measures zero impedance. Two, the rotor is completely free of Lenz drag which should yield a COP of very nearly 1; Hold on; There's an emerald green spark glowing in the relay, and a 120 volt bulb burning for free on fly back from the parting of the mechanical contacts. That equals OU!