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Degrees or percent? |
degrees |
Hub motors and large wheels.... |
Mad you had to be like tired over your handlebars to not flip back |
Pavement? |
rut |
What the grip |
Nah, ~17% is still pretty chill from a "trying not to flip" perspective, at least if you're not gunning it (which I don't have the low-end torque for anyway). |
Was kind of amusing to be bouncing off my thermal limit at sub-500w per motor though. lol |
https://www.youtube.com/watch?v=fBbcq53f1uM |
? |
it was a rutted banked hillside that had the street sidewalk above, and the park path below |
i didnt feel like going all the way to the end of the path to get up so just climbed the 45 degree rutted path in the hillside |
45 degrees and even chunky bicycle tires will be struggling for grip no matter the surface. |
That's probably where the confusion is coming from. |
oh 400lbs of weight on chunky fat tires at 15psi at the time |
momentum helped alot |
Wild |
def had tires starting to slip as i went up |
the path was rutted and rocky enough that the tires caught them (im pretty sure several rocks got yeeted backwards, no one screamed in pain/karen noises so figured it wasnt too bad) |
its steep enough that walking up it requires using some of the rocks as steps |
I've got two 20s5p packs in parallel of Samsung 35E's. I typically charge up to 81v and down to like 70v because I'm a wimp for the voltage cliff |
35E give u enuf discharge? 8A right? |
well its 80A continuous with 2 packs para and 130A peak |
depending if he tunes his controller correctly lmao |
That was meant for EPHii, are those direct drive motors? |
Oh gotcha |
Each has its own BMS? |
At the time of that video, the rear was direct-drive (MXUS 3005RC with Statorade), but the front was a tiny Bafang G311 geared hub. Love that tiny hub, but it just wasn't really up for the kind of riding I was aiming for, even in a 2WD arrangement. |
I've since swapped the G311 out for a Grin All-Axle direct drive front hub, so it's dual direct drive now. |
Front is now stronger? |
Yep. It's stronger, shouldn't be getting as hot (though my G311 didn't have a temp sensor, so I can't be 100% sure of that), and it helps with regen braking now too. |
With dual-motor regen, I only have to use my disc brake for panic stops - I'm still on my first set of brake pads from when I built up the bike in 2019, and they're nowhere near needing replacement yet. |
im guessing you were using grins monitor accessory for the wattage |
The Analogger? Yeah. |
And I used Dashware for the overlay. |
nvm vbms only saves as rdf and i have no clue how to import that so rip |
Yeah two BMS's in parallel. Not ideal but has worked ok thus far. |
Planning to replace them with a single big ass battery later, they are just meant to be booster packs in cargo |
And yeah izy I have never used these packs without figuring out Kelly's amp limit bullshit lol |
It was the old monster UPP battery that really got screwed there |
What's the bullshit you're talking about? Also, which switching frequency do you run in your Kelly's? If you were starting from scratch which controller would you pick? |
More stopping power, but what's the efficiency of regen, higher or lower? |
More stopping power u start using battery power to brake. Especially if ur rpm is lower than what the motor needs to produce enough voltage to recharge the pack. I think. Best case u get an extra 10%? |
I feel like there haven't been many studies for motorbikes and regen... Heavier bikes probably get a bigger benefit from it than lighter |
There is a "battery amp limit" in the program for their KLS controllers.. the name makes you think the number box is the number of amps, and the description in the manual would suggest that as well... Nope |
The input is actually the percentage of the controller's maximum phase amps, for the battery amp limit... |
So 600A controller, 90 input means 540A battery limit |
....not 90 amps... Very cool |
Can't remember freq at the moment but I left it right outside of my audible range. My mic can pick it up. |
And which controller depends on what build. I love how small the KLS7230s is but I have been thinking lately to slap the 8080h on my smaller bike despite it being a huge controller, because to bring a passenger with me up mountains, I kind of need that ridiculous torque |
7230s is a good match for a qs205, 8080h is a good match for qs273 |
Stick a big vesc on the bike |
Hhahahahahahah. "Lets start at 100A... *wheelie*" |
Pretty much how to tune it lol. Also im just picturing dogs hearing this screaching banshee coming around the corner. /s |
wouldnt that immediately just melt the phase wires to the motor |
considering the phase wires are only like 14 awg, can only support like 50a max |
a qs273 does not have 14awg wires lol |
You'd be suprised what will survive for long enough to flip you on your ass, lol |
Also yea, some motors have MUCH bigger phase wires |
I see, so on the 7230 that plays out fairly well, with 120 amps it's not too far, or is that a percentage of the boost 300a mode thing? Couldn't you just check the motor temp, if the 30s already gets it close to cooking, it probably wouldn't make sense to buy another chonker... Also, my 7230s used to work fine, until I shorted it, then the motor would vibrate badly, talking with them over mail, they said resistances are rather ok, maybe of some the small voltage rails are damaged, it shipped with 10khz, and I could hear that at low speeds, not too bothersome, and since shorting switching to 20khz removed the rumble, idk, maybe I will just ride it and always have stock as a backup on the bike... |
It would be a percentage of the maximum phase amps, so yeah, percentage of 300A. Lol |
For my 8080h, a percentage of 600A... |
And my qs273 never ever ever got warm until I used an 8080h at 120km/h for almost an hour |
My 7230s is a joke for my 273 |
I have never ever even been close to being bottlenecked on either of my 273s |
No matter if I use 8080h or 7230s |
When people ask if I'd put statorade in it, I'm like, uhhhh.... I can't even get the damn thing warm without it |
And idk about vibration, I never had issues. The only issues I had with a Kelly was one from AliExpress, it just died with some fatal error code, I got a replacement, and did not take long to die as well |
Then I ordered directly from Kelly and have been running for like 3 years now with no issues |
well you say that but how are you monitoring the temps lol |
lol, wonder if they are counterfit kelly's or 'for chinese internal market only' |
Should have bought a small 1MW vesc |
@Akbar "For chinese light rail projects only" |
There's a temp probe inside it somewhere, Kelly Controller has live reading |
Can use Bluetooth app on Android |
That and the good ol, pull over and slap your hand on the housing |
Hottest I ever felt a motor housing was my old voilamart when I was off roading with it in some sand. It was not a fan |
FUCKKKKK I FUCKED UP MY MULTIMETER |
It got dropped while I was riding and was outside all night ;-; |
Wet |
Doh üò¶ |
you could maybe open it to dry it out.. but I dunno if id ever trust it to measure accurately again |
Yeah I tried but shits fucked |
I ordered another one, they're like 10 bucks anyway |
Open it, wash with 90+% isopropyl, dry well, replace fuse and battery, check for corrosion under contacts etc. |
Would use it for rough measuring only |
Yeah I can't do rough measuring |
Gotta have shit down tight so I don't blow things up |
Yeah, I'm beyond dumb and hooked up a battery with reversed polarity, so even the LEDs blinking is amazing, something somewhere must've been damaged, but idk what really, one more thing I can do is monitor the low voltage rails while riding. What was the situation when you got it to overheat? I also wonder how fast can you pedal a 273, I'm still rather interested in e-bike-hybrid, rather than full on motorcycle. Also where did you get your 273s from? Got them together with the rim? |
You ran that with the kls as well, no, did you have a temp sensor in it? What did you do with all the parts that "died"? |
Direct from QS and yeah they built the wheel (with third party) |
Yes the 7230s has a temp input with the halls, basically plug n play with the 273 |
I have one dead 7230s in a drawer collecting dust, probably still has good components but filled with silicon would be annoying as hell to take apart |
Otherwise don't have non working parts really |
I think they are just sealed, not potted |
I think I am officially the worst at soldering XT-90s :3 |
Let’s see a pic |
I’m going to use it for a 48v 2 amp charger |
And that was or at least used to be an amass xt90? |
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