I got a new idea and i'm going to describe it here for the record.
The idea is about how the unipolar generator from tesla works. And why is better than Faraday's disc. The implementations mentioned stated that would be clear to those with knowledge in the art.
The faraday disc generates low voltage high current from a set consisting of a spinning disk and permanent magnets and brushes arrangement. It has many inefficiencies like leakage where the magnetic field is not cutting the disk brushes and so on. And all can be solved by a simple modification.
It all starts with a flat spiral coil.
It eliminates the leakage and allow the generation of a secondary magnetic field function of current "consumption" flow. Forming an inductor it now can act as an air core transformer for delivering brushless power output. Being it the generator and exciter field coil the field is maximum aways.
The basic idea is a set of 2 flat coil separated by a distance d, having opposite winding directions rotated at high speed in a rotor connected electrically to each other on the periphery and connected on the other rotor side with a special capacitor. The distance is to avoid cancellation of the magnetic field since they are opposite. No closed electrical loops should be formed in the rotor or would consume power.
The basics of this idea, is that since the rotation and magnetic field will create a voltage radially in the flat coil the current derived from this voltage can be set to generate a secondary magnetic field in one direction or in other direction while the radial counter emf field remains the same. It becomes clear than that the opposing emf can there to be totally cancelled by this secondary field while amplifying the initial field given the number of turns is greater than 3 thereto generating more energy the greater is the load given the rotation is in the right direction. I prefer to called it positive electromagnetic feedback. It its rotated in the opposite direction it should still work but there is a negative feedback added to it and it will thereto show back torque.
If constructed as described it will form a resonant circuit that oscillate automatically at the resonant frequency. It just need to be kicked into operation, no external stationary field coils are required. Thereto to take output power out of it, stationary coils can be placed so there is no contact rushes other than bearings.
The greater the number of turns the greater the amplification increase as function of the load.
The generator being the inductor itself it becomes a negative resistance inductor as function of the current there to resonance can be made self sustaining while consuming virtually no power from the motor shaft.
One could want to drive this resonance externally to extract more power. Than a stationary tuned load circuit could be useful. The term extracting power apply here.
This is the theory!
Is known from generators theory that the emf arise from a contrary magnetic field (opposing) to the exciting field that creates the magnetic drag effect. The current being induced by the magnet approaching or moving away induce a magnetic field that in the first case create an opposing magnetic field and in the second an attracting magnetic field. In the faraday disc case the current generated creates a magnetic field that subtract the magnetic field, Tesla made this field be generated in other plane direction to be able to cancel it.
The rotor should be plastic for better efficiency... with a decent diameter as to have many holes or maybe being a tube so many sets of coils can be used having the wires passing inside of it... could be outside for the sake of simplicity in each side of the rotor stay all the coils with the same direction only but they are connected in series electrically with the other side coils....
As this is a Feedback system it can become highly dangerous being high voltages and currents present, the thing can explode components if not correctly designed. I just publishing this info for informative purpose and do not encourage anyone to try it. If you want to try is only your responsibility.
The same effect can be made with a spinning solenoid too. But different possible shapes may exist.
