If I'm not mistaken, using the transformer you have, in reverse, would give you roughly a 115/12.5 voltage ratio, or a boost factor of 9.2. If the primary voltage were 1v, then, the stepped up output would be something less than 9.2v, accounting for some loss. Also of course you have to consider total AC power, which will be roughly the same for the input and output sides of the transformer, with some slight loss due to heat. Consider if the output amperage in this configuration will satisfy the need. If you need a 14.5v charging source, either the input voltage to the transformer primary needs to be increased or you'd need a different transformer with a higher winding ratio.Gyvven wrote:My electronics knowledge is very limited, however I'm hoping someone can enlighten me.
I'd like to build a low RPM (up to 180 or so) wind generator and most of the free motors I find have a very poor RPM/Volt output 35-45/1v. My thought was to use a transformer to step up the voltage to a minimum 15v and then regulate that down to a charging voltage of about 14.5v. I realize that this would probably incur some losses but I'm wondering if it could work?
I'm thinking I can either track down a proper transformer or maybe wind one myself. I have a 115v-to-12.5VCT 2A that I think could work. If I skip the center tap that would be an effective 1:4.6 stepup, right?
My other option is to use a set of gears to raise the RPM, and is probably easier, but I prefer learning something new.
smittex wrote:Use a voltage multiplier.
Also, look at the differences between a dynamo and a generator.
This looks fun
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