FUELLESS CAR PROTOTYPE by ISMAEL MOTOR

[MileHigh]

Mags:

Can you explain in some more detail what we are looking at?   They appear to be power waveforms?  Is one the input sine wave power and the other the power through the resistor?  What are the faint spikes and why are they there?   Are you sure that's just not an aliasing artifact?  Can you also show plots where we can see the 4 KHz switching waveform?  Except for the analog switch, are you using ideal components?  If yes, then you should do a second circuit where you simulate real-world components and show those waveforms.

MileHigh

[Magluvin]

Hey M
Im not claiming anything yet. ;]  Actually, I was just messing with it and removed the LC and the powers were not much different. Im a bit confused.  I gota eat something and get back to it.

That is just aliasing. When the waveforms are expanded, the input are sharp tipped ramps.
The output, right shot, is nearly straight spikes, but are ramp down once expanded some..   Also expanded, the power seen being sent back to the source is near 250 w but like a square wave, not a perfect top. But it can easily cancel out some of the area seen in the sharp ramp coming from the source.

Yes, I can expand the waveform to show the 4khz riding the 40hz. I have 6 circuits that I have to go through again to check for consistency. Removing the LC and seeing the results is not what I remember from earlier, err, last night.  Im going to do some comparisons in sim at lighting a sim light bulb via direct AC and then the circuit. At a slow rate in sim, you get to see the time period that it takes for the filament to heat up, and visually as the bulb gets brighter. It can run both circuits simultaneously. It can give us an idea if the wattage shown is really doing the amount of work it might look like its doing.

This is my friday night.     Gota eat.  Then I gota see what is going on with the LC added and not.


Mags

[MileHigh]

By the way, I am pretty sure that a typical MOSFET has about a 2-ohm D-S resistance.  I think I read that several times on the other thread.  I suggest that you guys check your spec sheets.

[Qwert]

Hi guys.
Is this discussion about a well known principle used in the auto ignition system? Here is a picture from well known book which describes many such aspects; what about a term "inrush current"? It's "Practical Transformer Handbook". See attachment.

[Magluvin]

By the way, I am pretty sure that a typical MOSFET has about a 2-ohm D-S resistance.  I think I read that several times on the other thread.  I suggest that you guys check your spec sheets.

An IRFZ44 D to S is .028 ohms on resistance.  A very common mosfet



Mags