the primary of the transformer is the field winding. the secondary represents a spinning magnet wheel. the magnets passing over the coil induces a small current in the coil that momentarily turns on the pnp which turns on the npn which pulses current through the same coil and that keeps the rotor spinning. its a similar concept to how the bedini motor works except in this circuit only one coil is necessary to run the motor because it is both the trigger and drive coil. And like the benini motor, IT DOESNT CREATE FREE ENERGY. sorry kids, nothing in the known universe can create energy from nada. Its a fantasy. the bedini is just an inefficient boost converter and nothing more.