Endless Sphere

One is Maximum Torque Per Amp (MTPA) that seems most interesting. Here is more on it: https://hackaday.io/project/164932-axiom-100kw-motor-controller/log/179447-mtpa-merged-into-vesc I am planning on adding this feature in the next firmware update. Cool, I didn't know Axiom is working on VESC and M...

IPM motors just make more sense. Can you recommend some IPM motor that can take 25KW and works well with your controller? (I suppose it works with backwards "field weakening" logic of IPM) Running AC motors in FOC would be a matter of software update. Thanks, in my understanding, when/if ...

Are there plans for this controller running ACIM algorithms and taking sine cosine resolver or encoder input?

want to build wrote: ↑

Oct 09 2020 10:13pm

could you retype it i feel there is missing caracters or at least i can not understand it

Nickel is 24% of copper conductivity, which means ~4 times more losses compared to copper conductor.

https://www.avoutlet.com/images/product ... solder.pdf

want to build wrote: ↑

Oct 07 2020 11:28pm

what does the lose of energy looks like with nickel.
to have an idea .
one cm cube for 1meter cube? if you havea visual comparison so i can decide how much it weights in my decision

tx

Cooper : Nickel = 1:4 (loss of energy)

arber333 wrote: ↑

Sep 20 2020 2:06pm

Here is the working version of Huebner inverter with lacrosse motor. I still have some things to resolve but i have positive throttle control with resolver interface. Mostly it seems to be EMI.
https://youtu.be/7Xq03S_Bpwg

Nice. Can you show the Inverter?

I Kweld manual says 4-30V input 2,000 amp max so I'm thinking of putting two of my 12.8v nominal A123 9.6ah packs in series for 8s or 25.6V Nominal with still a CCA of 250 or 400. I might need to also run some more in Parallel too. Any insight on using LiFePO4 on Kwelder???? https://thumbnails-phot...

PITMIX wrote: ↑

Jul 12 2020 3:04am

Are you ready to spend $ 200 on the delivery of a 12F or even a 24F? I prefer to pay $ 50 and wait until the post office does its job.

You are getting wrong something, I paid 15usd for 125usd, 44lbs pack on Friday. FedEx.

Perhaps lowering the price to $200 or slightly less and than including a mandatory service charge to make up the difference. Or require a completely separate/dual-stage invoice in order to ship the product(s) but only have the first receipt available to FedEx "Technical support service", ...

If the 24F comes compatible with a sin/cosin encoder there wil be a whole new world of motors in the picture. Can't waith untill you got this encoder running on the Nuc. A lot off verry good quality motors run only sin/cosinus encoders. Also, many asynchronous motors with sin/cosin encoder are sitt...

Thanks for your thoughts, I agree that if the fuse blows it may damage the plastic - but if this happens the whole battery needs tearing down and cell replacing in any case. What I mean is, his thermal camera reading have no value if they show 626F nickel melting temperature. I may simply cop the '...

He tests them under a thermal camera, and at 3a they keep a pretty stable 55deg f, which seems to basically be ambient. It blows at around 8-9a and at 626f. Nice video. My concerns rises a nickel fuse that is glowing white and liquefying at polycarbonate (plastic) melting temperature instead of see...

Thanks, that makes sense. Is that 'acceptable' the same as the 'acceptable' in the OP, so for example 0.1mmx5mm = 3A acceptable? Not that much of acceptable, here we have a "nickel" fuse link that must heat up to 1500C to blow, OP is calculating nice cool conductor. It is acceptable as fu...

I assume, they where behind the 8A instant blow value and considering nickel, which is not the best fusing material, with its high melting temperature, all ended at this low cross-section. Assuming: Nickel 1mm2 R at 20C = edit 68Ohm/1000m Link cross-section =0.2mm2 Link length =20mm Current =3A We g...

From what i've been searching, i only saw expensive industrial resolver/encoder converters, so probably it would be better to contact OP and ask for help or schematics on how to make your own converter board. I did search for encoder to resolver conversion some years ago and only found expensive in...

Zero resistance is a blown Fet. It is probably 1 blown in parallel aray but it is difficult to identify without desoldering, unless it is physically damaged. It is also a good habit to change the whole parallel group as the rest could take some damage to and Fets should be matched as well. Said that...

PM send

ElectricGod wrote: ↑

Oct 22 2019 11:51am

Has anybody tried welding aluminum with the KWeld?

Spiningmagnets is probably right. Watch the video below, nice trick.

Nice find.
Did someone try to run it on 120AC for <2000W out?
Original specs are 85-300AC <17A input, I wonder if any mode was done to the input /AC side by the seller.

I have some switches, but they are common ones rated at 16A. But I need at least 21A, because the two shunts give me 42A total. But I will give it a try anyway, because I rarely use full throttle it's already very powerful even on quarter throttle. Why do you need a switch? If you remove or cut 1 s...

VasiliSk, are there any future plans to code in ACIM motor support/algorithm?

trazor wrote: ↑

Apr 02 2019 1:16am

take some build techniques that don't require expensive tooling.

Amazing performance with such simple hand tools! Your video definitively is a source of inspiration to me. Thanks for taking time!

Nice project!

cut that will direct air onto the center of the coils, in either direction of rotation

Do you think they will work that way? Maybe more like centrifugal fan, despite the scoops?

With BMS you don't know what is going on until your pack is not working. I don't trust BMS boards made in China and I'm definitely not paranoid if comes to Li-ion batteries. Except it is BT BMS that has a big display and BT connection to your Android to show you more then your testers will ever show.

You might be able to just add some shunt resistor across the existing ones to increase the trip point. As long as you don't crank for too long, it shouldn't overheat. Some circuits come with a thermostatic switch to kill output if it overheats. Yea, that is nice suggestion I will use on my next bat...