Hello just to clear things,
Creating energy is not the correct translation, actually you are transforming mechanical energy into electric energy. Using a rotating electromagnet.
Do you know what the current flow will be if you short your the generator?
Z=sqrt(Rˆ2+XLˆ2)
I=V/Z
did you know that?
This mean the greater the speed, the greater is the frequency thus the higher is the voltage but if you could short it again the current is still the same since the relation between induced emf and reactance remains constant. Or power is not related to the speed but only to the magnetic field and coils sizes. So if you want low current high voltage you need lower magnetic field and higher speed. This is AKA amp restricted generator device.
A transformer works differently, you input a voltage and the current rise and fall result in induced voltage. However the induced voltage won't change with frequency.
I constructed by indication of UFO member from energetic forum, couple of years ago a tesla DC motor or generator that never revert the magnetic field on the rotor. Although it seems pretty good idea is yet more interesting since it seems to not develop the back emf so lot of current flows unimpeded, it seems that there is no reactance part, or at least it can be very small.