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Hi all, thought i would start a fresh thread about this oscillator charger, which is the one that gives very sharp pulses at around 1% duty cycle.
I've been making experiments, to discover what coils and wiring format, give this charger the most efficiency.
Upon various tests, i observed charge/discharge cycle efficiencies from 80% to 90% to a little over 100%, when trying different wiring setups, while making controlled charge and discharge cycles, to observe watt/hours used for both charge and discharge cycles.
Here is the nice thing about it, i've been using a 12 volt - 5 ah sealed lead acid battery for testing, which is only 50% efficient at absorbing charge, at least that seems to be the claims about lead acid batteries and charging to 15.50 volts peak under charge, which is even less efficient, because charging lead acid towards the end of charge becomes even less efficient.
That being the case, this setup is doing very well.
I've been testing many iterations of coil setups.
The best one so far, is using 18awg. speaker wire 100 foot rolls, i'm using the cheaper speaker wire, which is copper clad aluminum.
I made 2 coils so far, each in spiral pancake coil format and wound the easier way, with the speaker wire pair wound vertically, for ease of winding, then hot glued to hold it together.
The pancake coils are stacked on top of each other for better coupling.
Each speaker wire pair pancake coil, is in parallel and then in series with each other.
This gives each pancake coil a resistance of 600 milliohms, because the speaker wires are in parallel, then the pancake coils are wired in series to give 1.2 ohms total resistance.
Each 18awg. speaker wire pancake coil in parallel, which effectively makes it into a 15 awg. wire, instead of 18awg..
I'm using a buck/boost converter with digital readout, so i can see and control what is being input to the charger circuit.
Then using a digital charger, to observe and control exact amp hours being discharged.
I will post pictures of the setup and schematics when i get a chance to work on that.
All comments welcome.
peace love light
I've been making experiments, to discover what coils and wiring format, give this charger the most efficiency.
Upon various tests, i observed charge/discharge cycle efficiencies from 80% to 90% to a little over 100%, when trying different wiring setups, while making controlled charge and discharge cycles, to observe watt/hours used for both charge and discharge cycles.
Here is the nice thing about it, i've been using a 12 volt - 5 ah sealed lead acid battery for testing, which is only 50% efficient at absorbing charge, at least that seems to be the claims about lead acid batteries and charging to 15.50 volts peak under charge, which is even less efficient, because charging lead acid towards the end of charge becomes even less efficient.
That being the case, this setup is doing very well.
I've been testing many iterations of coil setups.
The best one so far, is using 18awg. speaker wire 100 foot rolls, i'm using the cheaper speaker wire, which is copper clad aluminum.
I made 2 coils so far, each in spiral pancake coil format and wound the easier way, with the speaker wire pair wound vertically, for ease of winding, then hot glued to hold it together.
The pancake coils are stacked on top of each other for better coupling.
Each speaker wire pair pancake coil, is in parallel and then in series with each other.
This gives each pancake coil a resistance of 600 milliohms, because the speaker wires are in parallel, then the pancake coils are wired in series to give 1.2 ohms total resistance.
Each 18awg. speaker wire pancake coil in parallel, which effectively makes it into a 15 awg. wire, instead of 18awg..
I'm using a buck/boost converter with digital readout, so i can see and control what is being input to the charger circuit.
Then using a digital charger, to observe and control exact amp hours being discharged.
I will post pictures of the setup and schematics when i get a chance to work on that.
All comments welcome.
peace love light
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