ESC32 & 5S LiPo

Info and Discussion about the ESC32 hardware and software

ESC32 & 5S LiPo

Postby Trnquill » Sat Apr 26, 2014 6:13 pm

I'm going to try 5S LiPos on my AutoQuad Y6. I have ESC32's and a really compact power distribution board:
Image

The battery leads are about 25cm long (=lead from power distribution board + lead on battery). I have currently 35V 330uF caps (supplied with ESC32) installed near every ESC32.

I read from the wiki (http://autoquad.org/wiki/wiki/esc32/esc ... are-setup/) that one should use 50V lowESR caps when flying 5S. I guess I should change my current caps, then?

I have a few questions:
1) When a cap is considered "lowESR" for this application? What value of Equivalent Series Resistance? I tried searching eBay for 50V lowESR caps but could not find any big enough.
2) What capacitance should I use? I draw less than 10A per ESC (6000mAh juice used in a 8 minute flight).
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Re: ESC32 & 5S LiPo

Postby JussiH » Sat Apr 26, 2014 7:34 pm

The standard cap is a Panasonic EEUFC1V331B. Its ESR is 68 millohms. Its 50V counterpart is EEUFC1H331L, 60 millohms
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Re: ESC32 & 5S LiPo

Postby Trnquill » Sun Apr 27, 2014 7:24 am

JussiH wrote:Its 50V counterpart is EEUFC1H331L, 60 millohms

Thanks! Looks like EEUFC1H331L is no longer available. I'll look for an alternative. Panasonic EEUFM1H471 seems to be available (470uF). But you think 330uF would be enough? Then I could go with Rubycon 50ZLJ330MT810X20 (38 milliohms).
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Re: ESC32 & 5S LiPo

Postby JussiH » Sun Apr 27, 2014 10:27 am

Yes, 330uF should be more than enough. Do mind the can size. I realize that the 50V caps are usually bigger than the 35V ones.
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Re: ESC32 & 5S LiPo

Postby Trnquill » Sun Apr 27, 2014 12:22 pm

JussiH wrote:Yes, 330uF should be more than enough. Do mind the can size. I realize that the 50V caps are usually bigger than the 35V ones.

Great! Yeah, I have to cut the cap holes a tad larger to fit the 50V ones in. Fortunately 330uF 50V Rubycon has the same diameter than the caps I'm using now. The can is just 4mm longer. So, I'll cut the "fingers" of PDB from the top of the caps off and the 50V's should drop in just fine. :)
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