Pretty sure it was based on the work by Shaman and his Little Focer, not that other architecture
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The SOLO uses 3x low-side shunts making it like the LFOC in that regard. Think mini-LFOC but lower voltage and current limits. It’s more optimized for esk8
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What other ESCs are DRV-less? I might have a gig making production golf carts and these are looking pretty perfect
Are these 65V nominal voltage 80A continuous battery amps, or is that the burst power?
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Yes, but if you plan on running them continuously at 80amps battery you will need to figure out some cooling, at minimum you will need to exposed the heatsink ribs to airflow
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Filtered air flow enough? Current plan is batteries/ESC/motor get a small 140x140x40 fan with an intake/outtake filter
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This should be tested. In my testing on esk8s exposing the heatsink ribs to airflow was all that was needed to keep the controller around 50-60c even on very hard long rides. So aslong as your fan gets enough air through your compartment you should be ok, but again, it should be tested
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Think the 7490 would be stable at 5000W continuous for long periods of time?
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You planning on making a duct to separate the airflow from the rest of the compartment or just keep it as one space? I’d only thought about this on paper before and allowing an opening to the enclosure with forced air feels like asking for trouble with water
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The motor controllers and electronics go in one case and every 18s4p 21700 or 18s6p 18650 goes in its own case (1 to 10 battery cases), cases sit in the chassis with a fan in each case that connects to a duct system with filters at the very end (outtake is just to keep shit from crawling in, intake will sit shielded under the seats where it’ll be mostly free from water and road debris)
Motor will just have case mounted impellers and a heatsink fin on the mount plate
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Yes, this particular motor is probably the better option. It will run cooler at that load than the other option on my website
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By virtue of being larger or is there a structural difference from the 64 series?
Both, the structural difference is in the stator itself, this is one of the only motors I’ve seen that has channels through the stator core for airflow, so unlike a traditional motors that only cool by air moving over the can and possible the coils, this motor cools also with air moving through the stator core
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I can confirm that these motors circulate air very well, i had a mechanical failure resulting in my pulleys grinding against my motor mounts and was still doing 20+mph for quite awhile without noticing until i stopped - despite the insane resistance the motor kept its cool LOL
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Part of me is tempted to put a 360mm AOI CPU cooler on the back of the ESC heatsink and squeeze every last drop of performance out of the controller 
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Bro! If you have the space 
freaking DO IT!!!
And send pics tho 
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If the deal goes thought and I get the funds to start the shop I’m absolutely getting a handful of solos and coolers for science and running them until something melts 
It’s a golf cart built from the ground up so I have the space to add all the fuckery we can dream of, legitimately the first round of displays is just gonna be a davega that’s panel mounted to the dash until we get a dedicated electrical engineer and programmer to make something custom
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This sounds so cool! And also sounds like great science!!
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Ohh cool gotcha, I have the attention span of a goldfish so I didn’t clock that you were talking about a golf cart and not an esk8, separate enclosure and that cooling setup makes much more sense now
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Simple test
18s 75v
300kv 14 pole motor
I am trying to see if i can free spin 150k erpm foc
30khz switching frequency, ortega original observer
The first pull was at 130k erpm limit set in Vesc and the second was 140k erpm
Looks like this setup is maxing at around 130k Erpm, 94-95% duty cycle
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my lord 750w no load lol
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