New VESC from China. Seems like not only Maytech is making VESC's now

Mosfets looks really sketchy for even 60A load…

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I think these are the specs on that MOSFET: https://www.onsemi.com/pub/Collateral/NTMFS5C628NL-D.PDF

Someone explain this in layman terms :sweat_smile:

If I read that data sheet correctly, it means FET’s are rates for 150A at 25C and 120A at 100C. But they also dissipate 110 W power at 150A, as far as I know thats a lot of heat and needs a beefy heatsink, maybe even a fan. But I doubt anyone would need 150A from a single VESC. At 100A power dissipated in only 50W which is not that bad. So a good heatsink paired with this ESC should be able do 100A continuous.

Website says 180$ - quite high for an unproven design from a Chinese seller IMO.

Well I had a long discussion with Barbie Zhang from FlipSky last night and have some interesting news to share.

First I’ll post the pictures she sent. These are of their VESC 6 in a model plastic case, which will be a waterproof aluminum one when released, and they should have pictures of that by May 20th.

This last pic is what looks like a rendering of what the aluminum one will be.

I’m a bit confused about the dimensions of the case. I was told it is 100mm x 92mm, which given the size the ESC that seems rather large in comparison. Regardless, that’s the info thus far.

I sure hope someone who’s good at testing these is able to get a hold of one so we can know if they’re reliable or not. They said they’ve been running beta testing since the beginning of April. These tests include: continuous current, continuous peak, current peak, temperature rise, etc… Well that’s all the news I have regarding this, hope it helps! :slight_smile:

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Is that a Micro or Mini USB port? Wonder how they’re planning on labeling the ports when they’re mussed together like that

Yeah I’m a bit confused too. Also with the power button being on the case, I want to know if we can move that or will the enclosure need to be opened to turn it on… I guess one could leave then in the on position and have a on /off switch further up the line like normal power buttons.

I am bigger in question is how you get motor sensor, can, ppm, uart out of this “waterproof” case :smiley:

looks to be micro

Still cheaper to handsolder the real deal :wink:

P.S. From technical perspective those mosfets are not even good for 60A focbox/vesc6 uses direct fet which are rated for over 300A ea and still struggle at 60A currents, this is 150A capacity so it means at 100A they will be burning open fire so maximum is like 60A not even constant cause the case is really bad at dissipating heat. Chinease ESC uses those mosfets but like in 5-6 in parallel for 80A currents :smiley:

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Oh, damnit. I knew it seemed to good to be true, lol…

This 20A ESC

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For those who actually can hand solder one of these things… I can’t :sob:

150A rated ESC :smiley: This is also require heavy duty heatsink with active cooling even at 50A

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you really want to compare flight ESCs (which are placed directly under/behind the propeller) with skateboard ESCs in dust/waterproof housing :wink: :wink: ?

I don’t really get your message :wink:

All ESCs have mosfets, all mosfets have some Rdson and all correspond to the law P=I² x R :wink: So you will have some heat on every ESC, just depends how you handle it :wink: . And if you look at that (from here): TempRDson

and that: IDTemp it is no wonder that you can’t do high loads cont. if you don’t get away heat. I don’t really think that 36 Fet design has really some better Rdson, just the losses splitted over some more space… :wink: :wink: :wink: :wink:

Back to topic:

okay, and what about wire gauge size?

how many are you yet? I would be in.

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Well I’d first like to see how a review of this turns out, but if it turns out to be good I’d say 2 to 4 (only if I’m unable to get the ESCape’s I’ve ordered, those are my first choice). I literally just posted this… How many were you in for? On top of my ESCape’s I’ve ordered, I’d probably get 2 of these.

sounds reasonable

Depends on how to mount them and how waterproof they really are. The screws in the case seem to be only for the big and small closing lid, so i don’t know how to attach them anywhere (without drilling into the waterproof case). And waterproof means at least IP67 (for me), everything else is waterresistant and can also be done by simple spraying.

All in all, maximum 3, worst case 0.

Life is a Learning experience :wink:

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