Charging capacitors at different voltage levels

Thread starter cala
Start date Mar 31, 2004
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Capacitors Charging Levels Voltage

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Charging capacitors at different voltage levels using a transformer can theoretically increase the voltage of a second capacitor, but practical limitations exist. The method described resembles a switched-capacitor boost converter, which can charge a smaller capacitor to a higher voltage, though it requires multiple cycles to reach optimal levels. Transformers operate with AC and do not provide a straightforward 100x voltage increase due to energy conservation principles and inherent losses. The discussion emphasizes that while transformers can redistribute energy efficiently, they are not "free" devices, as energy losses occur in the form of heat and other inefficiencies. Ultimately, real-world applications must account for these factors to achieve desired outcomes.

Apr 5, 2004

Cliff_J

Science Advisor

cala - 360W for 30s from a 33uF capacitor at 12V? This is beyond absurd. If this were true, once you figure out how to build it then call the defense department and tell them you have the solution to their electronically propelled kinetic energy projectiles.

You're math for the energy stored in that capacitor is off by a factor of about 4.5 million. If you don't believe it, build this, should only cost a few bucks if you wind the transformer yourself.

Cliff