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-   -   Ripple voltage - safe zone (https://www.rc-monster.com/forum/showthread.php?t=32222)

Big House 08.13.2015 09:58 PM

Ripple voltage - safe zone
 
What is the safe zone for ripple voltage. I was comparing graphs of my XL2 with and with out cap packs and in looking at all three the highest ripple voltage i saw was 4v at 306 amps. Trying not to kill my controllers so any help is appreciated.

Pdelcast 08.14.2015 02:23 PM

Quote:

Originally Posted by Big House (Post 429864)
What is the safe zone for ripple voltage. I was comparing graphs of my XL2 with and with out cap packs and in looking at all three the highest ripple voltage i saw was 4v at 306 amps. Trying not to kill my controllers so any help is appreciated.

The safe zone depends on capacitor temperature. At 4V of ripple voltage, the capacitors are not going to survive long...

If you are really running those kinds of peak currents, I'd suggest an external capacitor pack (or 2!)

http://www.castlecreations.com/produ...-cap-pack.html

Thanks!

Patrick

Dr_T 08.19.2015 04:04 PM

Quote:

Originally Posted by Pdelcast (Post 429866)
If you are really running those kinds of peak currents, I'd suggest an external capacitor pack (or 2!)

Patrick, is the amount of ripple Voltage a good indication for the need to increase Capacitance? Say I am between 5-10% ripple Voltage (sort of ok zone, right?), would adding more Capacitance still lower the ripple and be beneficial?

Can one add too much Capacitance? More specifically: is there a maximum amount of Capacitance you would advice for a Mamba Monster or XL2?

Thanks!

Pdelcast 08.19.2015 10:52 PM

Quote:

Originally Posted by Dr_T (Post 429893)
Patrick, is the amount of ripple Voltage a good indication for the need to increase Capacitance? Say I am between 5-10% ripple Voltage (sort of ok zone, right?), would adding more Capacitance still lower the ripple and be beneficial?

Can one add too much Capacitance? More specifically: is there a maximum amount of Capacitance you would advice for a Mamba Monster or XL2?

Thanks!

You can't add too much capacitance... More is always better, but diminishing returns above about 1.2mf (1200uF)

Percentage isn't a good indicator either, the absolute ripple voltage is the best value to use. I prefer to see a ripple voltage below about 2V in my setups.

Thanks!

PAtrick

Dr_T 08.20.2015 03:33 AM

Thanks Patrick!


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