Quote:
Originally Posted by DCM
no, the cap is there to help the fets open and close more efficiently
|
Quote:
Originally Posted by glypo
of course brushless ESC's need large power capacitors to filter out the voltage ripple.
|
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.