Solid State Orbo System

[exnihiloest]

It doesn't matter if the flux leaves the core or doesn't leave the core at on time, because the pickup coil is open circuit during the on-time of the pulse, thus if there is flux leakage due to saturation during the on-time, it's not inducing an EMF in the pickup coil.

GB

False statement. A change of flux through a coil always induce Emf. Emf is an electric field acting as a force onto the electrons. When the circuit is open, there is no current but still a potential difference, a voltage. You are confusing voltage and current.

[exnihiloest]

Why would you not want the flux leaving the core?
The only thing that makes this work is the flux leaving the core. If the flux was contained totally within the core, how will any current be induced in the pickup coil?

The flux in question was only the flux from the coil.
We would not want this flux leaving the core if we wanted that the 2Sgen works as the dreamers imagine it.
The dreamers dreamed about a ferrite core acting as a variable filter between a permanent magnet and a pickup coil. And the dreamers dreamed that the coil flux remains confined to the core, just for modulating the permeability and consequently the permanent magnet flux, at almost no cost. It is the reason why the coil flux should not escape.
I verified by experiments what the dreamers among whom I was dreamed, and obviously it was a dream. The field theory still applies. Even in non linear materials, the fields superpose. A flux is not a current that we could switch on and off by such a way, it is conservative.

[Airstriker]

It is not the problem, it is the solution: the "leakage" flux is the useful flux that the pickup coil recovers.

Ok we all (almost) agree.

I don't believe you have measured the energy for saturating the core. It is not small, it is big and always less than the energy recoverable by the pickup coil.

It shouldn't be if you set the MH operating point as Naudin says:
http://jnaudin.free.fr/2SGen/images/2SGenworkingzone.gif

Proof?

BEMF would not directly be related to the supplied coil current as it's magnet's flux that does leak.

We must remember that it is only the change of flux that induces current in the pickup coil. The change of flux is due only to the coil field, not to the constant permanent magnet field. The magnet field is just the way for unbalancing the saturation along the toroid core. It doesn't provide energy (Naudin is right on this point).

IMHO that's not right. The toroid coil's flux remains inside the toroid core. The flux leakage is due to the coil's field, but it's the magnet's flux that does leak. And yes the magnet's field is the way for unbalancing the saturation along the toroid core but it's also does provide the energy.

[Bruce_TPU]

Hi Gyula,

It is back at 70 Hz for sure.  This of course drops as the rotor switching drops.  This would change the values of the cap, correct?

Thanks!

Bruce

[gravityblock]

False statement. A change of flux through a coil always induce Emf. Emf is an electric field acting as a force onto the electrons. When the circuit is open, there is no current but still a potential difference, a voltage. You are confusing voltage and current.

False statement, when measuring between two points you are closing the loop (creating a return path), thus you will see a voltage. The charges may be separated, but they're not moving (static electric field).  It takes a moving charge to induce a magnetic field.  There is no voltage/current through the pickup coil during the on-time because the pickup coil is open (there is no potential difference due to no return path, thus there is no voltage.....there is no potential difference because there are no connections between the two ends).  This means the flux leakage isn't providing the power to the pickup coil.  The pickup coil is closed during the off-time, thus it is the collapsing field that is inducing a voltage/current in the pickup coil.

You are trying to twist my words and taking things out of context.  Please tell me how having no potential difference or connection point between the two ends of the pickup coil due to a leakage flux of the toroid during the on-time is going to power the pickup coil when it is open.

GB