Ghazanfar Ali Generator - Utlilizing trapped energy

[poynt99]

poynt... would the global temp setting (if memory serves it's usually around 300K) being set to 0 or negative cause this?

That's a possibility I hadn't thought of. I've never adjusted the global temperature in my sims, but  the default setting in PSpice is 27C.

The strange thing to me is that Ali changed the circuit configuration in the PSpice file. Was this the only way he could make it run in a similar way to the Multisim version? Or was he just experimenting?

Also, someone early in the discussion said that it didn't work in LT Spice. So I am wondering if there is some peculiarity in Multisim that allows this circuit to work?

If Ali would be so kind as to upload a working ORCAD/PSpice file with the same circuit as the Multisim, then we'll know for certain.

.99

[WilbyInebriated]

That's a possibility I hadn't thought of. I've never adjusted the global temperature in my sims, but  the default setting in PSpice is 27C.

The strange thing to me is that Ali changed the circuit configuration in the PSpice file. Was this the only way he could make it run in a similar way to the Multisim version? Or was he just experimenting?

Also, someone early in the discussion said that it didn't work in LT Spice. So I am wondering if there is some peculiarity in Multisim that allows this circuit to work?

If Ali would be so kind as to upload a working ORCAD/PSpice file with the same circuit as the Multisim, then we'll know for certain.

.99

i wasn't sure of it myself but i thought i had remembered seeing such params when looking at some of the source for pspice. i thought there was a temp setting for each component also? base setting or was it max operating temp? something like that... you're far more experienced with sims than i, so i thought i would fly it by you and see what you thought.

300K is 26.85C
i'd swear the source showed kelvin, but from what you are saying i'm guessing where you change the setting, the user definable field is in celsius? strange, i wonder why they did that?

[poynt99]

Yeah, you bet.

You can change the temperature of each component, and even perform temperature sweeps.

Celsius is easier to get a handle on I'd guess; after all, our multi-meters do measure in Celsius.

.99

[forest]

@forest
I just posted my findings, what is wrong with that? I really hope that in real life the circuit works like claimed by Ali.


@poynt99
I forgot to mention that if I do that, everithing miracolously works 



Dann

Fix circuit. it won't work with square wave generator, I tried also. It will work with pulsing power source element .
I tried also various simulation extensions and it is very unstable but I sucessfully charged capacitor without depleting oscillations too much and it looks very funny when you fast discharge that capacitor. It has to be done very quickly to dampen only halp amplitude of oscillations and then by a miracle those spikes are jumping up and down like accomodating to something and then after 1 or 2 seconds again it become stable amplitude.

[madddann]

Fix circuit. it won't work with square wave generator, I tried also. It will work with pulsing power source element .
I tried also various simulation extensions and it is very unstable but I sucessfully charged capacitor without depleting oscillations too much and it looks very funny when you fast discharge that capacitor. It has to be done very quickly to dampen only halp amplitude of oscillations and then by a miracle those spikes are jumping up and down like accomodating to something and then after 1 or 2 seconds again it become stable amplitude.

If I copy paste my circuit (built from scratch) to the Ali 1.2 platform it works (overunity) as it is. The generator does not make any difference - it's output is the same. See? I attached the picture and the file.


Dann