Perfectly good comments.
The problem is with inventing unless you can do everything yourself you risk giving away your ideas, however no disrespect but I dont think anything so far is going to be stolen off you.
Hi,
I assumed that because he was discussing this in an open forum he just wanted to do some brain storming and didnt care that much about revealing any ideas. In fact, he seems to want more ideas from others about how this might be done, and if it is even possible.
Nothing that i know of using AC can make DC without commutation. That includes harmonics because any harmonics always go through zero just like the fundamental frequency. And magnetics and coils produce AC. Any wave we see with a DC content always has a DC component in addition to it's AC components (if any). So the DC content is already there by some means that is not due to any AC behavior alone.
In other words, no combination of AC signals can produce a DC signal using only linear circuit components. A coil would be considered a linear circuit component.
There is a chance that using a magnetic core in addition to a coil would help if the core was biased with a magnet. A magnetic core is only linear up to a certain point, and with pure AC and unbiased core it is still linear, but becomes non linear when the excitation nears the saturation flux density. That would cause the AC to be clipped, but it would be clipped symmetrically about zero so all the harmonic components would still be AC.
Using a magnet to bias the core however (not a DC current which we dont actually have yet) the clipping would become non symmetrical, and thus we might then see a net DC. The important phrase here though is "net DC", it's not total DC but over the average it might actually contain a DC component that would charge a battery for example. The down side though is that it would be pretty inefficient because the core would have to constantly saturate, and so there would be plenty of losses. Charging a battery directly with this kind of current would mean the battery would charge up somewhat for half the cycle and then discharge a little during the other half cycle (roughly speaking). That would mean the battery would age faster too even though it would end up with a net total charge that was more than what we started with, and not using any direct rectification.
So that might be one way to do it, but because of the inefficiencies it basically bites <smile>