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Thread: Cap banks - the pre-emptive answer

  1. #331

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    You can quite easily make your own... Do you have a soldering iron?

  2. #332

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    Quote Originally Posted by Brushless55 View Post
    does someone make cap banks on OSE that I can use for my P Limited and Q setups ?

    thanks
    Quote Originally Posted by dmitry100 View Post
    You can quite easily make your own... Do you have a soldering iron?
    I'm looking for someone who has made them in the past and sold them here at OSE
    thanks
    Jesus is King .......NAMBA20...Caterpillar UL-1, P-Spec OM29, P-Mono DF33, P-Spec JAE, Aussie 33" Hydro-LSH, Sprintcat CC2028 on 8s, PT SS45 Q Hydro, PS295 UL-1 power, OSE Brothers Outlaw QMono 4-sale, Rio 51z CC2028 on 8s

  3. #333

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    What would be the best setup for extra Caps for 4S to 6S
    The ESC has 4 built in 35v - 390uf already.

    I have in the past added 4 extra 35v - 470uf caps.

    I need to know if this is good, or is there a better way.

    Larry
    Past NAMBA- P Mono -1 Mile Race Record holder
    Past NAMBA- P Sport -1 Mile Race Record holder
    Bump & Grind Racing Props -We Like Em Smooth & Wet

  4. #334

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    Up to 5000uf additional caps wouldn't hurt ... to be on safe side and all. If you think thats a lot they are 470uf caps after all... but more of smaller caps are better (more efficient) than less of large ones.

    A lot of people add (more or less) caps based on ESC though. Just make sure they are new and decent quality caps (Rubycon ZLH or ZL) and not the old/dodgy rubycon stock from Ebay... :P
    What kind of ESC are you running?

  5. #335

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    I run CC 240 Hydra's mostly on 2 & 4S thinking about a 6S setup also.

    The ESC has 4 built in 35v - 390uf already.

    I have in the past added 4 extra 35v - 470uf caps.
    I have not had any problems this way in years.

    Is this good enough or is there a better way?????

    Larry
    Past NAMBA- P Mono -1 Mile Race Record holder
    Past NAMBA- P Sport -1 Mile Race Record holder
    Bump & Grind Racing Props -We Like Em Smooth & Wet

  6. #336
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    Larry, the 470uf caps would do just fine. Better than nothing should I say. I think 4 or 6 1000uf 35v would be better. That's what I use on most everything unless it's hv then I go up to 50v caps. I have actually picked up speed going from 6 1000uf caps to 10 1000uf caps on one of my saw boats. Not saying more is always better, but it was in this instance. I'm no expert as I learned about caps because of this thread, but this is what's been working for me.
    32" carbon rivercat single 4s 102mph, 26" Shockwave v3 (64.5mph) KBB34 mono (91.2mph) shocker single 99.9mph, proboat zelos twin stock 76.3mph, 27" 4s cat 92mph

  7. #337

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    I like 6+ of the 1000uf as well. Where do you guys get your HV caps? I would love to find some of the RUBYCON 63V 1000u RX 30 like what Etti uses in there high voltage bank, 50V would be fine too. Not having any luck.

  8. #338

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    Quote Originally Posted by kfxguy View Post
    Larry, the 470uf caps would do just fine. Better than nothing should I say. I think 4 or 6 1000uf 35v would be better. That's what I use on most everything unless it's hv then I go up to 50v caps. I have actually picked up speed going from 6 1000uf caps to 10 1000uf caps on one of my saw boats. Not saying more is always better, but it was in this instance. I'm no expert as I learned about caps because of this thread, but this is what's been working for me.
    Do you connect 6 - 1000's in Parallel or do you put any in series??

    Larry
    Past NAMBA- P Mono -1 Mile Race Record holder
    Past NAMBA- P Sport -1 Mile Race Record holder
    Bump & Grind Racing Props -We Like Em Smooth & Wet

  9. #339
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    Quote Originally Posted by TRUCKPULL View Post
    Do you connect 6 - 1000's in Parallel or do you put any in series??

    Larry
    I run all mine in parallel
    32" carbon rivercat single 4s 102mph, 26" Shockwave v3 (64.5mph) KBB34 mono (91.2mph) shocker single 99.9mph, proboat zelos twin stock 76.3mph, 27" 4s cat 92mph

  10. #340
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    Quote Originally Posted by Jamey View Post
    I like 6+ of the 1000uf as well. Where do you guys get your HV caps? I would love to find some of the RUBYCON 63V 1000u RX 30 like what Etti uses in there high voltage bank, 50V would be fine too. Not having any luck.
    I get mine from some electronics place on eBay. I use rubycon or nichicon
    32" carbon rivercat single 4s 102mph, 26" Shockwave v3 (64.5mph) KBB34 mono (91.2mph) shocker single 99.9mph, proboat zelos twin stock 76.3mph, 27" 4s cat 92mph

  11. #341

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    Quote Originally Posted by kfxguy View Post
    Larry, the 470uf caps would do just fine. Better than nothing should I say. I think 4 or 6 1000uf 35v would be better. That's what I use on most everything unless it's hv then I go up to 50v caps. I have actually picked up speed going from 6 1000uf caps to 10 1000uf caps on one of my saw boats. Not saying more is always better, but it was in this instance. I'm no expert as I learned about caps because of this thread, but this is what's been working for me.
    That is good news..
    does your esc run cooler with this setup ?
    Jesus is King .......NAMBA20...Caterpillar UL-1, P-Spec OM29, P-Mono DF33, P-Spec JAE, Aussie 33" Hydro-LSH, Sprintcat CC2028 on 8s, PT SS45 Q Hydro, PS295 UL-1 power, OSE Brothers Outlaw QMono 4-sale, Rio 51z CC2028 on 8s

  12. #342
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    Quote Originally Posted by Brushless55 View Post
    That is good news..
    does your esc run cooler with this setup ?
    Well to be honest I've never checked before and after. I've always just added the cap bank on my builds and my customers builds. The only boat I have that doesn't have an added cap bank is my zelos. But that won't be long before I add one. Likely 4 1000uf per esc I'll add.
    32" carbon rivercat single 4s 102mph, 26" Shockwave v3 (64.5mph) KBB34 mono (91.2mph) shocker single 99.9mph, proboat zelos twin stock 76.3mph, 27" 4s cat 92mph

  13. #343

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    Well, castle esc's are known to blow up without extra cap banks... so probably a good idea to go overkill in that area.

  14. #344
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    Quote Originally Posted by dmitry100 View Post
    Well, castle esc's are known to blow up without extra cap banks... so probably a good idea to go overkill in that area.
    Do you know this from experience? I've run several castle escs without cap banks and they never failed. Brushless55 has one in the rigger I sold him. No extra caps. Works just fine. They are very sensitive to water. I epoxy coat every esc I run. Including the castle in his rigger.
    32" carbon rivercat single 4s 102mph, 26" Shockwave v3 (64.5mph) KBB34 mono (91.2mph) shocker single 99.9mph, proboat zelos twin stock 76.3mph, 27" 4s cat 92mph

  15. #345

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    Nah, just from the numerous reports and articles I've come across. I believe they have even started putting extra cap banks on their newer esc's.

  16. #346
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    Quote Originally Posted by dmitry100 View Post
    Nah, just from the numerous reports and articles I've come across. I believe they have even started putting extra cap banks on their newer esc's.
    Maybe they are, because I think it does help. The major issue with castle escs was being very sensitive to water and on the 240 hydra ice they put 35v caps on the board. When you have an 8s capable esc the caps should be higher voltage than that.
    32" carbon rivercat single 4s 102mph, 26" Shockwave v3 (64.5mph) KBB34 mono (91.2mph) shocker single 99.9mph, proboat zelos twin stock 76.3mph, 27" 4s cat 92mph

  17. #347

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    Quote Originally Posted by kfxguy View Post
    Well to be honest I've never checked before and after. I've always just added the cap bank on my builds and my customers builds. The only boat I have that doesn't have an added cap bank is my zelos. But that won't be long before I add one. Likely 4 1000uf per esc I'll add.
    curious to know how it runs after you do that
    Jesus is King .......NAMBA20...Caterpillar UL-1, P-Spec OM29, P-Mono DF33, P-Spec JAE, Aussie 33" Hydro-LSH, Sprintcat CC2028 on 8s, PT SS45 Q Hydro, PS295 UL-1 power, OSE Brothers Outlaw QMono 4-sale, Rio 51z CC2028 on 8s

  18. #348

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    Quote Originally Posted by Brushless55 View Post
    That is good news..
    does your esc run cooler with this setup ?
    belated reply .. lol ..
    correct assembly of caps will run the battery and esc a little cooler...

    -too many additional caps ( eg 300+% of original ) will punish the battery

    -QUALITY rubycon high yield, low esr caps are 16v, 35v or 63v ......... intermediate voltage rates are provided by electrolyte combinations.... ergo avoid the 50v

    despite my best attempts at reconfiguring mail filter settings and such.. I fail to rcv notifications from OSE
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    Wayne Schutte PhdCSE BaSE BaEE. Australian, & damn proud of it YOUTUBE
    @ 36" H&M Maritmo twin1512/1800 6S1P 88mph @ 40" drag hydro#1 twin 5692 12S1P .....always for fun @

  19. #349

    Thumbs up

    I was curious at how Travis's boat was running with his setup

    I run caps on all my setups even helis
    Jesus is King .......NAMBA20...Caterpillar UL-1, P-Spec OM29, P-Mono DF33, P-Spec JAE, Aussie 33" Hydro-LSH, Sprintcat CC2028 on 8s, PT SS45 Q Hydro, PS295 UL-1 power, OSE Brothers Outlaw QMono 4-sale, Rio 51z CC2028 on 8s

  20. #350

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    drwayne:

    Would you say of caps like these which, little did I know before ordering, are Made in China?

    https://www.digikey.com/product-deta...1713-ND/756229

    They seem like a good brand. This particular new model is some new type of electrolytes. Thought they'd be Made in USA... but Made in China (surprise!) after I received my order of a bunch of them lol.

    Btw, any particular way of knowing whether you have too little or too much caps? You say 300% of original would punish the battery...

  21. #351

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    Here's my new Cap Bank Board for my 8s system. There are 3 types of caps, Low Z large electrolytic, very Low Z polymer electrolytic (smaller cans) and the surface mount MLCC caps, side pic shows them the best. EC5's are directly soldered to facilitate hookups to battery pack (inside set) and ESC (outside set). All components are directly soldered to 0.025" copper strips, providing very low inductance and resistance contributions. Looking forward to putting it to use!
    Attached Images Attached Images

  22. #352

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    Nice work on the Cap Bank Board.
    My only question is the size of your plugs for a 8S system?

    Larry
    Past NAMBA- P Mono -1 Mile Race Record holder
    Past NAMBA- P Sport -1 Mile Race Record holder
    Bump & Grind Racing Props -We Like Em Smooth & Wet

  23. #353

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    These are EC5's... I'm looking for a little resistance. An electrical circuit is made of up R, L and C. It's like good chili, need the right balance! But the R is still ridiculously low, about 0.0025 at power and temp, per connector. So that's 0.0025 X 90A X 2 = 0.45V That's the roll off I'm looking for.

  24. #354

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    Nice.
    But not correct.
    Under current draw the weaker/lower f caps will inhibit the larger.
    EC5 plugs are ok up to around 100A max.
    Keep at it.
    Wayne Schutte PhdCSE BaSE BaEE. Australian, & damn proud of it YOUTUBE
    @ 36" H&M Maritmo twin1512/1800 6S1P 88mph @ 40" drag hydro#1 twin 5692 12S1P .....always for fun @

  25. #355

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    The reason the separate capacitors are used is based solely on frequency response. At motor fly back frequency, the MLCC ceramic cap is dominant. The polymer cap just helps to extend the bulk capacitor's frequency response. The caps don't get in the way of each other, they react at given frequencies. Don't want to get into an EE battle here, been designing motor drive circuits since the '80's, so very respectfully, I have to rely on my experience.

    I am working with a 100A Max circuit. Expecting currents of 88-94A, that's what my target prop size is for.

  26. #356

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    Keep us updated
    Wayne Schutte PhdCSE BaSE BaEE. Australian, & damn proud of it YOUTUBE
    @ 36" H&M Maritmo twin1512/1800 6S1P 88mph @ 40" drag hydro#1 twin 5692 12S1P .....always for fun @

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