audio amplifier as a power generator (instruction)

[x_name41]

in all likelihood the difference will be in the output part, maybe in addition to the LC filter you'll need a suitable mid-point step-up transformer, and the outputs to be switched [perhaps via a relay] in audio and inverter modes

[dxer_87]

I understand from those posts that an AC step up inverter may be used instead of a transformer? This may be, but i don't know if the popular switching supply modules would work. They have different frequency than 50Hz. They work above 8kHz. Thus this should be something more original like STEP UP 9V-230V AC/AC Inverter (available?). Also I understand your claim that the amplifier may work in "Impulse" mode I proposed in my handbook. With bigger caps in supply this is possible, but I think it does not make much sense if Paulos is stable and to boost power you may add motor with magnets near transformer or use Modo on phase output or even combine with this caplos.

Only to check if it would eventually work, you can try with this https://pl.aliexpress.com/item/1005004942381316.html straightening first the voltage by bridge rectifier and add a cap, but i can see the wrong freq. issue... Maybe for switching supply powered amplifier this may be better... many questions...

[dxer_87]

More info on Modo:

I think using 3-5 ohm/50W on input may protect the circuit. Messing with audio input may change the overall effectivity.

[worldcup]

More info on Modo:

I think using 3-5 ohm/50W on input may protect the circuit. Messing with audio input may change the overall effectivity.

Glad to know you are still working on this gizmo, just waiting for the video which shows device in action.

Regards

[dxer_87]

Hi,

I've been thinking more about this version with inverter. In my opinion a transformer is simple and good solution. It works well with low frequencies. The energy gathers in this place between transformers, so you may get more than 500W between devices of overall lower power. Even using 10W transformer and 50W main trafo will give good effect.

But using inverter may be good for switching supplied devices and some of the amplifiers utilize this like home cinema players with speakers included. My only proposition here would be sth not like AC-DC-AC converter but dismantling existing inverter and driving it from an amplifier channel tuned to specified frequency in range of 8-25 kHz. This may give some savings in inverting voltage.

Good amplifier has real efficiency of about 110-120% (input vs. output). Giving good inverter to this may easily loop, but don't forget about noplis trick and utilizing right channel.

Also this version with fat coil works well with voltages like 20V 1kHz sawtooth, and amplifier gives only 6-9V unmodified. You may try this coil only with special supply and driver. May close the loop.