Electric Bikes - A little improvement

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Borromeo
11-09-09, 11:25 AM
Dear people, I have thought a little improvement for my SLA batteries: Connect in parallel with them a large-capacity electrolytic capacitor, let's say 5000 uf x 80 V, the purpose is to improve the peak current to the motor, What do you think?

alfonsopilato
11-10-09, 10:53 PM
:: jeff dunham's peanut doll going : vrrroooooooom showing hand going over head :: way passed me .. i'll let others who understand electronics comment.. i don't know anything about that, but at least i was first to greet you with a comment :D
Borromeo
11-11-09, 06:09 AM
Gracias de todos modos, Alfonso...

wernmax
11-11-09, 10:21 AM
It's a good idea to have a big cap on your power supply (except for the inrush currents when connecting power), unfortunately, unless it's a supercap, your "normal" capacitor doesn't store enough power to make any difference. One Farad is one amp X one volt.....about one watt/second of power. Your 5000 uF cap is five thousandths of that, so at 36 volts it would contain .180 watt/seconds of power. A 500 watt motor is typical on an e-bike and uses 500 watt/seconds of power per second.

Afraid you wouldn't notice any change.