Sharing a single piece of heatsink(we dual ESC 97% of the time here) is more efficient than two separate ones afaik, maybe thereās a better heatsink out there but this is close unless there are FETs right up to the edge of the 84mm dimension.
It would help for the vertically challenged.
EDIT: I see the capacitors(Samxon 220uF which is 21mm long) make it no difference to go to a shorter heatsink. Maybe there is a shorter cap option in order to fulfill that remit? Something about 15mm-16mm tall, with a 10mm heatsink and 5mm(?) standoffs total height above pcb could reduce by 5mm.
And since there is components on the underside of the pcb, maybe there is real estate to have smaller Aluminum Electrolytic caps on the underside to equal up to a single Samxon 220uF.
I donāt want to reduce the amount of capacitance. I could possibly look at the option having the Caps horizontally like the previous revision but that will tack on 20mm of length. This would allow for a slimmer heat sink. What do you think is the more important dimension here to optimize? Length or girth? (giggity)
The general consensus is one half a dozen of the other but the one thing that gets em riled up is too much height and too much length (or width!). For this reason dual ESC is favoured since that is the most used platform, hence the huge popularity of Unity.
So what we see here is 25mm-ish or more with additional cooling. The caps on their side would work and most do it that way, footprint notwithstanding.
A custom CNCād heatsink is another way to offset height and this is what the other guys do typically, of course this ends up costing the consumer more nut yeah height would be the major concern. In saying that eFoil, eBike etc typically need one ESC and care little about that.
If you care about high voltage market adoption by esk8 it canāt be ignored in which case you need to research the high-amp VESC6 product range by these vendors (maybe include ZESC & Maytech as well)
In fact this may be a better approach we see little of the ESCs linked here or high voltage at all due to size & the horrible freaking cost.
In order to get a better idea of what the market demands some competitor analysis is required, so if we can exclude tiny stuff and anything built on top of VESC4 standards which is not the market for this offering (Cheap FOCer already takes care of that) then the competitors are
Flipsky ()
FSESC75200 75V High Current 200A ESC Base On Vesc For E-Foil Fighting Robot Surfboard AGV Robot Arm Size:100mmx61mmx30mm
Stormcore 100D 126X70X24mm
Of course everybody is creaming themselves with the wish for a 100D, the 100S is essentially half of that or not much larger than a focbox OG
Seems about 25mm of height is about right. One key property Iām trying to hit still is cost. This isnāt meant to be the smallest, or most powerful, or highest end controller. Itās meant to be the best bang for your buck while still fitting the bill for typical power needs.
I have a target price but it all boils down to what it costs me to make these. Iām trying to with hold from any guesstimates until I have pricing for services like assembly, kitting, and shipping.
Hi! Just wondering. Do you have an estimation when you will out out some 84V FOCers? I see all the nice updates for the other esc, but wondering which is the state of the big brother
Thanks for the info. In case someone from the beta testers can not help anymore I will probably have a 14s-15s dual escooter in the pipe line. I am going to modify a prebuilt one with better esc and battery.
I think the most important part is taking care of the electronics. Case and heatsink are easy to design. I can also help in case you need.
I think the 84V esc is what will give you the best return. Fingers crossed.
The general consensus is one half a dozen of the other but the one thing that gets em riled up is too much height and too much length (or width!). For this reason dual ESC is favoured since that is the most used platform, hence the huge popularity of Unity.
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