Cheaper & quicker to assemble and most importantly more compact. The various cap configurations that we are delivering are due to what was available from suppliers at the time. When we bought parts for the first 1000 we couldn’t secure 3000 caps of the same type. So we had to make some changes otherwise there would be more delays…
Its also worth pointing out that VESC 6.0 is adopting the same configuration of 2 caps… in my opinion two caps is the best configuration in terms of size, price and assembly time.
on vedder’s site testing has been done by Ren and really there should be more caps than on there. Without enough caps the inductance of the wires will slowly or quickly destroy the vesc.
The FOC program especially suffers from the inductance of the battery wires
…but on the 6.0VESC they are much closer to the power stage…
@onloop just send them, as i said no problem with waiting. But if they come different as shown in the picture you lost 1 customer for the future. Already last time when i bought vesc from you, on your page they were shown with wires+cap soldered but they came without.
When i buy things from other sellers, things arrive like they are shown, or at least there is a decent hint which says something different.
and please explain this. cause you still use the pcb and skip the middle cap from what ive seen on pictures. takes the same place in my eyes. just curious?
Sry i can’t… Equivalent series resistance - Wiki
but i read alot trough ES and vedder’s forum, and that is what they told me there when i asked about caps. and the guys there normally know what they say…
Simply spoken: It’s the internal resistance in the capacitor. If you put resistors (with the same value) in parallel the resistance decrease.
If capacitors put in parallel the capacity adds up.
So it’s better to use more caps if a low esr counts.
Hi, I did my electrical engineering course some decades ago, so I’m a little rusty regarding some concepts.
I would understand the importance of the ESR if the capacitors were between the ESC and the motor since the current has several different frequencies.
But since the capacitors are between the battery and the ESC their main purpose is to accumulate energy and compensate the lenght of the cables, it shouldn’t make any differente the ESR value.
Anybody can prove me wrong about my understanding. I have been proven wrong before and learned something new.