Quote:
Originally Posted by glypo
Kind of the same thing mate. As I outlined in my post, there is more than one reason for having a power cap. Firstly for power supply, as I said takes away strain from battery and provides more punch (as with brushed) which allows power surges (more punch) reduces ESR and so on. These are more beneficial effects of a power capacitor.
The second reason is more of a requirement than a desire. As you say the power cap is essential in helping the FETs operate efficiently. This is because the power capacitor effectively dampen the voltage ripple and dramatically reduces temperature and overall load on the system.
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the first part is an off-shoot of the esc's being driven more efficiently on the opening and closing cycle, the Cap isn't there to increase punch, just to assist them, as a Cap can give far more over the tiny time it takes to open/close the fet than a battery can. The off-shoot is the ESC runs cooler, more efficiently, and then feels punchier.