Search found 1710 matches

by larsb
May 28 2020 12:10am
Forum: E-Bike Non-hub Motor Drives
Topic: Rieju 50cc conversion
Replies: 198
Views: 24313

Re: Rieju 50cc conversion

Rear fender and mounts are printed, like it! I might do a carbon overlay on the fender to give it some strength, i’ll see when i get it.
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by larsb
May 27 2020 1:44pm
Forum: E-Vehicles General Discussion
Topic: Votol EM-100 & EM-150 controllers
Replies: 932
Views: 87210

Re: Votol EM-100 & EM-150 controllers

It’s called ”rate of rise” and ”rate of decline” on the screen
by larsb
May 27 2020 4:18am
Forum: E-Vehicles General Discussion
Topic: Votol EM-100 & EM-150 controllers
Replies: 932
Views: 87210

Re: Votol EM-100 & EM-150 controllers

The ramp up / ramp down setting at first settings screen doesn’t work in my (early model) controller but seems to work for others, you can try changing the ramp down settings to see if that helps.

@overclocker: what bugs do you experience?
by larsb
May 26 2020 11:59pm
Forum: Motor Technology
Topic: APL's DIY axial-flux motor
Replies: 1071
Views: 96783

Re: APL's DIY axial-flux motor

Eventually the increasingly smaller core will saturate so it’s a balancing game how large core/ how many turns / how many coils
by larsb
May 26 2020 11:51am
Forum: E-Bike Non-hub Motor Drives
Topic: Rieju 50cc conversion
Replies: 198
Views: 24313

Re: Rieju 50cc conversion

Starting to build a carbon fibre box under the seat for the APT96600 controller. I love/hate carbon layups, the high cost of mistakes makes it a ”win big or lose big” game.
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All the f*ckups are yet to be done, don’t know yet what they will be :D
by larsb
May 21 2020 7:07am
Forum: E-Bike Non-hub Motor Drives
Topic: Rieju 50cc conversion
Replies: 198
Views: 24313

Re: Rieju 50cc conversion

.. 40ish MPH is more than enough Torque 450 N.m is the goal - Yes that is a lot but is what new Electric Trials bike have; so close is goal. I'm not looking to implement on a clutch on this build. I'm not too good with 2 stage reduction, so go big on the motor and just do 10t/50 or more teeth in re...
by larsb
May 21 2020 1:11am
Forum: E-Bike Non-hub Motor Drives
Topic: Rieju 50cc conversion
Replies: 198
Views: 24313

Re: Rieju 50cc conversion

There’s a link to the battery cover build earlier in this thread. Batteries are mounted high to fit the third module inside the frame later on, each module is 10s/36V. More than three cannot be fitted unless one is stacked on top of the upper two and two more as ”sidebags” in the rear (but i think t...
by larsb
May 20 2020 3:16pm
Forum: E-Bike Non-hub Motor Drives
Topic: Rieju 50cc conversion
Replies: 198
Views: 24313

Re: Rieju 50cc conversion

First driving tonight with the new motor at 72V and the new 1:8 gearing. Thought it was a bit disappointing at first but realised i had restricted settings :D Now it easily pops a wheelie and is more than i can handle since i’ve been going smoothly for too long, throttle needs to be feathered :D 785...
by larsb
May 20 2020 3:06am
Forum: E-Vehicles General Discussion
Topic: Votol EM-200 Controller
Replies: 24
Views: 1883

Re: Votol EM-200 Controller

if you only want 40mph top speed then the 3000W motor is enough for most applications, if you gear 1:8 you'll have up to 450-500Nm at the rear wheel
by larsb
May 20 2020 2:59am
Forum: E-Vehicles General Discussion
Topic: The BEST connectors, period
Replies: 51
Views: 7338

Re: The BEST connectors, period

Ugh! Now that's nasty.
by larsb
May 20 2020 2:32am
Forum: E-Bike Non-hub Motor Drives
Topic: Rieju 50cc conversion
Replies: 198
Views: 24313

Re: Rieju 50cc conversion

yes, off course.. It's a bit stupid but i have no ride now and i normally don't use anything else than the moped. I want to be back riding electric.
by larsb
May 20 2020 12:47am
Forum: E-Vehicles General Discussion
Topic: The BEST connectors, period
Replies: 51
Views: 7338

Re: The BEST connectors, period

amberwolf wrote:
May 19 2020 8:55pm
Had other stuff to say but had an involuntary nap in the middle of typing and can't remember what it was. :(
I think you were about to tell me about your favourite lethal voltage power connector :D :D
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by larsb
May 19 2020 11:55pm
Forum: E-Bike Non-hub Motor Drives
Topic: Rieju 50cc conversion
Replies: 198
Views: 24313

Re: Rieju 50cc conversion

What i’ll be running won’t be even close to the limits of the wire insulation. Even the max 32kW is within the boundaries of the specs. What will be the limit is Eddy losses which will increase squared with rpm. The thin laminations, segmented magnets and low pole count of this motor should reduce t...
by larsb
May 19 2020 3:42pm
Forum: E-Bike Non-hub Motor Drives
Topic: Rieju 50cc conversion
Replies: 198
Views: 24313

Re: Rieju 50cc conversion

Cardboard engineering a rear fender mount
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It’ll be 3d-printed by a friend, always nice to get from design to reality in such a short time
by larsb
May 19 2020 3:33pm
Forum: E-Vehicles General Discussion
Topic: The BEST connectors, period
Replies: 51
Views: 7338

Re: The BEST connectors, period

Yes, i know :wink:
I increased power usage for a while without issues, then, strangely, i got issues :mrgreen:
by larsb
May 19 2020 11:04am
Forum: E-Vehicles General Discussion
Topic: The BEST connectors, period
Replies: 51
Views: 7338

Re: The BEST connectors, period

I like the JWPF connectors for signals, they are super small but the latch easily gets locked by dirt, will try some hirose DF62 for next build, that latch looks better. :thumb: So far i’ve been using anderson pp45 for phase and battery , they melted at 200A (doh!) so i changed to XT150s, been worki...
by larsb
May 18 2020 3:29pm
Forum: E-Bike Non-hub Motor Drives
Topic: Rieju 50cc conversion
Replies: 198
Views: 24313

Re: Rieju 50cc conversion

I always thought about going to higher voltage with the 3000w mid drive. The (low) 5 pole pairs should reduce eddy losses a lot: The 80100 motors with 7 pole pairs top out at 7krpm before eddy losses gets too high (or so i’ve read..) Eddy losses are proportional to pole pairs squared so in compariso...
by larsb
May 18 2020 6:24am
Forum: E-Scooter and Motorcycle General Discussion
Topic: Quality of Kelly Controllers
Replies: 14
Views: 1054

Re: Quality of Kelly Controllers

Yes, agreed, what i mean is that Sabvotons and some Votols have been sold unlocked / under no warranty, user can set a gazillion amps if they want to. In these cases it's the responsibility of the user if they use the controller outside of the max ratings and it blows.
by larsb
May 18 2020 5:31am
Forum: E-Bike Non-hub Motor Drives
Topic: Rieju 50cc conversion
Replies: 198
Views: 24313

Re: Rieju 50cc conversion

ordered a new DC DC capable of 30s voltage/126V: https://www.aliexpress.com/item/4000751456728.html?spm=a2g0o.cart.0.0.4b863c00U5cR4y&mp=1 Will order three LED drivers and put in series for adjustable charging on the cheap (voltage and current): "Mean Well ELG-150-42AB" has adjustable current and vo...
by larsb
May 18 2020 1:13am
Forum: Battery Technology
Topic: Recommendations for 30s lipo charger
Replies: 10
Views: 185

Re: Recommendations for 30s lipo charger

Crossthreading: https://www.endless-sphere.com/forums/v ... hp?t=92316

As always i’m not first :wink:

I’m looking at having three ELG-150-42AB in series, would fulfill all requirements i had at 35$ each so basically a configurable charging system at 105$, that’s not bad.
by larsb
May 18 2020 1:06am
Forum: Battery Technology
Topic: Recommendations for 30s lipo charger
Replies: 10
Views: 185

Re: Reommendations for 30s lipo charger

Thanks for the tip, could be good if i was in US!

with shipping to elcon 50$, shipping to me 50$ and reprogramming 100$ (yikes!), then 25% taxes and imports into sweden - then it’s a 400$ charger again - bummer
by larsb
May 17 2020 12:35pm
Forum: Battery Technology
Topic: Recommendations for 30s lipo charger
Replies: 10
Views: 185

Re: Reommendations for 30s lipo charger

I don’t see the issue with cc+cv LED drivers without charge cutoff? When battery is at the set voltage on the driver no more current will flow. Might be some losses in the driver but the meanwells seem to be able to take it. Might need some diodes for reverse voltage protection.. need to check this....
by larsb
May 17 2020 8:05am
Forum: Battery Technology
Topic: Recommendations for 30s lipo charger
Replies: 10
Views: 185

Recommendations for 30s lipo charger

Hi, building 30s 30Ah battery, need a charger. Preferably with option to set voltage 120-126V and do currents above 2.5A (so no high power needed) What do you recommend? Been looking at meanwell led drivers 3x42V in series but total cost for the ones i looked at will be 200 usd or so. Isn’t there a ...
by larsb
May 17 2020 1:52am
Forum: E-Scooter and Motorcycle General Discussion
Topic: Quality of Kelly Controllers
Replies: 14
Views: 1054

Re: Quality of Kelly Controllers

Yes, certainly. Only when the controller is unlocked would it be the responsibility of the user to set ”correct” parameters
by larsb
May 16 2020 3:58pm
Forum: E-Bike General Discussion
Topic: Can't Get #@!!@ Tire On Rim
Replies: 33
Views: 573

Re: Can't Get #@!!@ Tire On Rim

I’ve had same issue with impossible tires, that time due to low diameter. I could eventually force it on. If the rim is ok in size then i’d scrap the tyre. I didn’t and later failed to fix my flat in the middle of a 3 hour road bike session. Walking in bike shoes that far isn’t so nice :D