Hi All,
This is my Bach EMF circuit to collect the fly back effect do to load.
https://www.youtube.com/watch?v=O5114W_Nx5o (https://www.youtube.com/watch?v=O5114W_Nx5o)
Tom
Thanks for posting this.. I have been working on an almost identical circuit.. Sometimes I drive a motor with it, sometimes solid-state.. But I have been flipping polarities with an H-bridge and using a choke, or primary of a transformer with open secondary..
I sent you a PM..
After building this and looking closely, it is not identical to my build- actually is totally different.
I do not believe this is "Back-EMF" you are collecting. I am pretty sure you are collecting Fly-back. Or inductive kick-back from disconnecting and collapsing the magnetic field. You are only collecting from the negative side, where the flyback escapes.
Back-EMF would be coming out of the hot lead back to the battery, limiting your input amperage. But the diodes are blocking the Back-EMF.
It differs from my build, as I am only separating off the hot side. And I get no varying voltage spikes. All my collection pulses are exactly uniform and my voltages stay steady.
I still thank you for posting it. Looks identical to a typical diode flyback arrestor they use on motors, but with a cap to catch it. Which could be useful.