Learn me about "power-capacitors"
#1
Learn me about "power-capacitors"
Hi everyone,
I'm using older Novak GTB esc's that have treated me well for many years. Currently I'm having problems fitting one of them under a very low profile body and the main culprit is the keg of a single power-cap that is stock on this unit. I've searched but there doesn't seem to be much discussion about changing these out, even though there are many replacement choices in the aftermarket.
The question is this - if I match the voltage and uf of the current "keg", am I ok changing to any of the smaller, multi-cap banks out there?
I'm using older Novak GTB esc's that have treated me well for many years. Currently I'm having problems fitting one of them under a very low profile body and the main culprit is the keg of a single power-cap that is stock on this unit. I've searched but there doesn't seem to be much discussion about changing these out, even though there are many replacement choices in the aftermarket.
The question is this - if I match the voltage and uf of the current "keg", am I ok changing to any of the smaller, multi-cap banks out there?
#3
Super Moderator
iTrader: (31)
Join Date: Nov 2008
Location: RIP 'Chopper', 4/18/13 miss you bud:(
Posts: 15,482
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Hi everyone,
I'm using older Novak GTB esc's that have treated me well for many years. Currently I'm having problems fitting one of them under a very low profile body and the main culprit is the keg of a single power-cap that is stock on this unit. I've searched but there doesn't seem to be much discussion about changing these out, even though there are many replacement choices in the aftermarket.
The question is this - if I match the voltage and uf of the current "keg", am I ok changing to any of the smaller, multi-cap banks out there?
I'm using older Novak GTB esc's that have treated me well for many years. Currently I'm having problems fitting one of them under a very low profile body and the main culprit is the keg of a single power-cap that is stock on this unit. I've searched but there doesn't seem to be much discussion about changing these out, even though there are many replacement choices in the aftermarket.
The question is this - if I match the voltage and uf of the current "keg", am I ok changing to any of the smaller, multi-cap banks out there?
#4
Tech Regular
I once had a discussion with a Novak engineer and whet he told me is that the Cap had to be of low ESR type ( equivalent serial resistance, I think).
#5
Tech Elite
iTrader: (37)
Other ways to decrease the total ESR and give higher ripple current capability are using capacitors with higher voltage rating or higher capacitance.
Also, using several smaller capacitors with the same total capacitance as one single capacitor will increase the ripple current rating, since they have more surface area to dissipate heat, and the heat has a shorter path to get from inside to the outside.
Again, if replacing an ESC power cap with another made for the purpose, all of the above is already taken into account. But I have included the info as a response to the title of this thread.
Last edited by howardcano; 02-07-2015 at 02:39 AM.
#6
There is some good info in this thread.
Another thing to consider is that capacitors "age"; that is, they degrade with use (and sometimes with storage). Replacement is advised on some sort of regular basis, since RC power systems are downright abusive to these components.
Another thing to consider is that capacitors "age"; that is, they degrade with use (and sometimes with storage). Replacement is advised on some sort of regular basis, since RC power systems are downright abusive to these components.
#7
Another thing to consider is how much power you are drawing. I know with a Tekin RS Pro, you are OK to use just the one provided cap down to an 8.5 turn motor. Any lower, it's suggested you add a second cap.