esc extension

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Steve Mansell
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esc extension

Postby Steve Mansell » December 22nd, 2019, 10:19 pm

I'm aware battery cables to the esc shouldn't be extended without a capacitor bank, but is it ok to extend esc to motor cables.
Looking forward a long way I'd like to build either a hp 0400 or a vickers vimy. The weight of the batteries would need to be as far forward as possible, in the fuselage nose.
Cheers
Steve

Steve Perry
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Re: esc extension

Postby Steve Perry » December 23rd, 2019, 6:52 am

Use thicker motor wires than normal because of the length and twist the 3 together to minimise any interference from them.
If adding capacitors to the battery cables then use Low ESR ones

Tony Collins 1073
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Location: Braintree. Many Miles from any "Large Model" club
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Re: esc extension

Postby Tony Collins 1073 » December 23rd, 2019, 9:16 am

Steve, an ESR or equivalent series resistance. If you are using a large electrolytic capacitor with high ESR,
all you have to do is place a low ESR capacitor such as a ceramic 0.1 uF capacitor in parallel.
[ Note, parallel, not series]
Steve Perrys guide of thicker cable twisted together should also be applied

Tony.

Steve Mansell
Posts: 199
Joined: March 1st, 2012, 11:59 pm
Location: Farnborough, Kent
Contact:

Re: esc extension

Postby Steve Mansell » December 23rd, 2019, 11:23 am

Many thanks all. It's just a pipe dream at the moment, but my experience with large electric so far has been encouraging, and I do love the ww1 planes!
So far: 1/4 scale Albatros C.iii, 1/4 scale Pfalz D.Xii, and DH 9a on the building board. :D
Cheers
Steve

Steve Perry
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Joined: July 12th, 2015, 7:47 pm
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Re: esc extension

Postby Steve Perry » December 24th, 2019, 9:14 am

Adding a small ceramic .1 in parallel will do nothing for what happens inside non Low ESR capacitors, yes it may well lower the measured ESR of the 2 together but it's like adding a garden hose pipe along side the Mersey Tunnel to help traffic flow :)
Low ESR capacitors are not hard to find, the rule is to add 2200uf per 4 inches, a quick ebay search gives £6.50 for 5 rated at 35 volts, yes more expensive than £1 for 10 via Aliexpress for normal ones.

You don't need to add 2 X 2200uf for 8 inches, you can just use 1 X 4700uf.
It gets interesting if you go over 35volts as higher voltage caps get harder to find, the trick is to use 2X 4700 in series to get 2200 but at 70 volts :)


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