Super Induction - Addition of rotating magnets
Hi Vineet,
I surely missed your above post on the 'super induction' setup last year. Now that I have read it here are my comments.
I agree that the flux increases in the soft iron core whenever the setup is in alignment as just shown 'freezed' in Fig. 2. The flux increase comes from the addition of the instanteneous AC flux to the flux of the permanent magnets, this addition takes place in syncron with the AC source frequency but for this to happen you have to rotate the coil-core assembly at a correct speed too. Of course this latter process needs to input some (rotational) energy to the setup (besides the AC input to the coils and the bulb) to compensate for the friction and air-drag.
Question is how much energy is given (or can be given) to the setup by the two permanent magnets? Obviously, there must be an upper limit for the ultimate strength for those magnets, considering the soft iron core saturation properties and the lack of stronger than N52 or similar type of (off-the-shelf) rare earth magnets.
To answer this question, one needs to test and test and do correct measurements.
Notice: I think that for the AC input source you would benefit from using an AC current source instead of an AC voltage source because a voltage source has a very low inner impedance which may shunt hence dissipate the induced energy while a current source can have a high enough inner impedance to avoid shunting of the extra induced energy. Typical AC voltage sources are for instance the AC mains or a transformer secondary while AC current sources should be created (not so easy to do it efficiently though).
So your setup may really give more brightness to the bulb with the diametric magnets present, compared to the magnetless case and only rigorous tests can answer how much more output can be received by the presence of the those magnets.
Gyula
@Gyulasun,
Thanks for a diligent (perfect) reply. I totally agree with that.
Regards,
Vineet.K.