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Overunity Machines Forum



Partnered Output Coils - Free Energy

Started by EMJunkie, January 16, 2015, 12:08:38 AM

Previous topic - Next topic

0 Members and 218 Guests are viewing this topic.

MileHigh

Is that the scope that Verpies mentioned where you can double the bandwidth with a simple hack?  Do you have to 'root' your scope?  lol

TinselKoala

Quote from: MarkE on February 05, 2015, 05:01:23 AM
A fast switching MOSFET connects to an unclamped inductance.  Huge potentially destructive voltage spikes and ringing caused by the unclamped inductance coupled to parasitic capacitance are fully expected and ordinary.
That's right, and actually I'm surprised that I haven't yet blown any components. The spike is so narrow that there really isn't much energy in it even though the voltage is outrageous.

The IRF830 mosfet does get hot though. And I've caught it staying ON a couple of times even when the Gate signal is off, and this causes a huge DC current drain and rapidly heats the mosfet. So I've put a 100K resistor from Gate to Source to assure that the mosfet turns off when the Gate signal is off and the main power is still on. This doesn't affect any of the waveforms or other behaviour.

I still haven't tried a IRFP260n power mosfet yet. Once I dig one out it's just a matter of plugging it into the socket. Those 5-position mini-molex cable sockets are really handy for mosfet sockets, I wire them GGDSS and they will fit both TO-220 and TO-247 packages perfectly.


TinselKoala

Quote from: MileHigh on February 05, 2015, 05:59:44 AM
Is that the scope that Verpies mentioned where you can double the bandwidth with a simple hack?  Do you have to 'root' your scope?  lol
Yes, I believe it is. I haven't looked up exactly how to do it yet though. Check the features on that little puppy, and the user reviews. It does integration as well as the usual trace math, and has a beautiful looking display. Lots of measurements. I like the X-Y display, you can get a Lissajous pattern and a time-domain display of the traces at the same time on the screen! Also does FFT spectrum analysis, etc.

MileHigh

I am almost going insane because I can't find the bits of precision for the four A/D channels and I am still searching.

MarkE

In something of an analogy:  How much force does it take to stop a locomotive in:  An hour?  A minute?  A second?  A fraction of a second?

A decent power MOSFET can switch in 10ns to 50ns.  The new GaN MOSFETs switch in under 1ns.  If a MOSFET carryies current from an inductor, (and all conductors are inductors) the magnetic field associated with that current will when the path is interrupted cause a voltage rise without limit to sustain the current.  As the voltage rises, the current goes into parasitic capacitance.  This continues until either something conducts: an intentional clamp that diverts the current through a different current branch, or an arc forms, or the energy is transferred completely to the parasitic capacitance.  All boost, flyback, and derived power supply topologies rely on this behavior.  Kettering ignitions are examples of where the goal is to intentionally form an arc.  If an arc does not form at a low enough voltage the ignition driver can be damaged.  Flyback circuits go back over 100 years.  There is no associated free energy.

Old too is the idea of bucking coils on the same transformer.  Back before switching power supplies completely took over, multi-tap transformers were used to match up international line voltages.  In some configurations a 10V winding on the transformer would be wired to buck a 120V winding so as to get a 110V net winding. At mains frequencies there's no need to wind in different directions.  Just swap leads, connecting dot to dot in series instead of dot to not dot.  These practices go back many decades.  There is no associated free energy.

One can design coupled coils / transformers many ways.  The fundamentals don't change.  The hypothesis and evidence absent idea of overunity EMJ put forth is nothing more than a lark.