I don't know the name of the principles involved, nor the authors/inventors credited, but I know the principle itself.
- Electromagnetic force can generate current.
- Current can create (and negate) magnetic force.
This kind of generator requires some power for initial spin up, and turns self sufficient once it achieves a certain RPM threshold.
Magnet's attraction is used to "generate" rotation, small current is used to nullify generating opposite attraction (or "wheel" slowing down) at a precisely timed short moment. Magnets attract for a longer period of time, current is used to nullify the magnetic force for a short(er) period of time.
This is NOT perpetuum mobile. Magnetic force is driving the whole thing, with a manual spinup + battery for storing energy acting as an energy buffer. Energy/power used to nullify the magnetic force at those short intervals is less than energy generated by the motor itself.
Also, efficiency of this generator can reach and even exceed 100%.