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Adding capacitors with long power cables?

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rich
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Adding capacitors with long power cables?

It would be interesting if there is a difference to V4 regarding adding capacitors with long power cables. I just received 2x VESC 6 (niiiiice!) and thinking about mounting them on the back of my trampa. Right now I have the V4.12's inside the battery enclosure and long phase wires. In my case the power cables would have a length of about 50-60 cm.

benjamin
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I was talking about that and doing some simulations in this video:

based on my conclusion it is not really needed, and you would have to put the capacitors very close to make any difference at all.

rich
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Wow, what a video, respect! I couldn't follow all steps due to lack of knowledge but my question is answered, thanks!

rahmaev_a_o
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How to choose ESR?
How to choose the capacity?
I want to reduce the capacitor.

TechAUmNu
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Basically lower ESR = less heat = caps last longer before the vesc goes boom

For capacity you need to simulate the circuit with his PSpice file. Takes a while before you understand all the variables. Main one being inductance, if its too high it doesn't matter how much capacitance you have it will always blow up.

rahmaev_a_o
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Thank you
 

frank
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50cm should be fine without additional caps. Make sure that the wires are thick enough (AWG11 or 10).