Thanks for the tip. I'll have to pull my controller back apart and look for that component.minimum wrote:Usually for these controllers there's to-92 case voltage regulator which is capable of putting out up to 100mA.
I did try to trace down the regulator when I had it apart before, but was unable to locate it. Maybe I can figure it out this time.
It's the stock controller that comes with the Cyclone 3k kit (the 1800-3000w). It's rated for 36-72v 40Amp, but many of us have been running it right at the max, and a little over.progrock wrote:What's the specs on the SaiKeLong 400?
I've run mine a few test runs on 24s, but no long range runs. It worked without issue, however I would not run it like that all the time.
Mind you I have not modded the shunt for more amps. That test run was with 4x relatively weak power tool packs. I doubt they could output more than 30A.
(FWIW, 24s x30A... I'd say each cell in my pack was putting out 3.9v under full load. 24 x 3.9 = 93.6v ______ so 93.6 x 30A = 2,808w. Still under 3000w)
Your main issue is the 3x 80v caps for each motor phase. Caps are usually underrated by around 10-15%. While you could run them at 72-96V, that would not be wise.
They will run hotter and dry out faster. In the worst case, you might have a weak cap that barely meets the spec, and blows out under high load. Could possibly take other components with it.
So you could run it on 24s, but understand that you will be shortening the life of the controller if nothing catastrophic ends up happening.
You would be stressing the whole controller going over the spec. Mostly the Caps and the FETs. Those would need to be upgraded at the least.
For short quick bursts, you might do ok. Continuous riding at that power level would kill the controller pretty quickly.