Search found 712 matches

by larsb
Feb 20 2019 2:27pm
Forum: Motor Technology
Topic: Comparing two Electric Scooter Motors
Replies: 3
Views: 130

Re: Comparing two Electric Scooter Motors

Correct there AW, 26" wheel at 2000rpm is 240km/h or 150mph!

Didn't think of that :D
by larsb
Feb 19 2019 4:22pm
Forum: Motor Technology
Topic: Comparing two Electric Scooter Motors
Replies: 3
Views: 130

Re: Comparing two Electric Scooter Motors

-Test unloaded speed of wheel at full throttle (noload rpm) and at what voltage you measured it. -Divide it to rpm/volt which is called voltage constant: kV From this calculate torque constant kt: image.jpeg Next check max current: Imax of the controller Max system torque Tmax is kt*Imax Torque Tx a...
by larsb
Feb 18 2019 2:42pm
Forum: E-Bike Build Threads / Photos & Video
Topic: 10 kW Giant Glory 1
Replies: 31
Views: 2449

Re: 10 kW Giant Glory 1

:D seriously, that snow riding!
How old are you :D
any sane person would've quit after the second crash.
by larsb
Feb 17 2019 9:06am
Forum: E-Bike Non-hub Motor Drives
Topic: New Motor for a Mid-Drive ?
Replies: 11
Views: 523

Re: New Motor for a Mid-Drive ?

That was a surprise! Did you ask both for sensored/sensorless? I really thought it would be higher.
by larsb
Feb 17 2019 5:31am
Forum: E-Bike Non-hub Motor Drives
Topic: New Motor for a Mid-Drive ?
Replies: 11
Views: 523

Re: New Motor for a Mid-Drive ?

Vasilis original thread name for the nucular is 100kerpm controller :D I think he even posted a video driving some high erpms.

Post the results when you try :D
by larsb
Feb 15 2019 2:26am
Forum: Motor Technology
Topic: APL's DIY axial-flux motor
Replies: 182
Views: 4090

Re: APL's DIY axial-flux motor

I tried a molten NaOH salt bath on my phase wires with enamel that wouldn't come off. Cheap, effective but dangerous. One minute in the bath stripped wires totally clean and shiny 😃

Outside, gloves, eye protection, "disposable" clothes and no fumes breathing.
by larsb
Feb 14 2019 1:33pm
Forum: E-Bike Technical
Topic: High eRPM Speed Controller (ESC)?
Replies: 1
Views: 125

Re: High eRPM Speed Controller (ESC)?

Just saw this.. Check out nucular controller here on ES. It should do 100kerpm and users seem happy.
by larsb
Feb 14 2019 6:56am
Forum: E-Bike Non-hub Motor Drives
Topic: New Motor for a Mid-Drive ?
Replies: 11
Views: 523

Re: New Motor for a Mid-Drive ?

Isn't nucular controller up to 100kerpm.. yep! The 12fet should be a pretty good match.
by larsb
Feb 14 2019 2:15am
Forum: E-Vehicles General Discussion
Topic: Votol EM-100 & EM-150 controllers
Replies: 61
Views: 3381

Re: Votol EM-100 & EM-150 controllers

What is fault code when you throttle, what type of throttle have you got, hall or potentiometer?
by larsb
Feb 13 2019 4:04pm
Forum: E-Vehicles General Discussion
Topic: Votol EM-100 & EM-150 controllers
Replies: 61
Views: 3381

Re: Votol EM-100 & EM-150 controllers

Did you set the temp protection acc to section 2.7 in the manual? What does this setting look like now? I think overheat might not be an actual issue since controller status message is fault code "0001000 idle" and not overtemp. I've had this message without any issues in the driving of the controll...
by larsb
Feb 12 2019 3:09pm
Forum: Motor Technology
Topic: APL's DIY axial-flux motor
Replies: 182
Views: 4090

Re: APL's DIY axial-flux motor

APL wrote:
Feb 12 2019 2:11pm
Well, yea, sure,..I did look it up. but most of it is overseas. thought maybe you had a US source already.
sorry for the pun, it's only that i am in sweden.. only time i buy from the US is when i really must since the air freight and taxes are huge..
by larsb
Feb 12 2019 2:54am
Forum: Motor Technology
Topic: APL's DIY axial-flux motor
Replies: 182
Views: 4090

Re: APL's DIY axial-flux motor

http://www.giyf.com

"Rectangular magnet wire" :D
by larsb
Feb 11 2019 3:12pm
Forum: Motor Technology
Topic: APL's DIY axial-flux motor
Replies: 182
Views: 4090

Re: APL's DIY axial-flux motor

Wire is made in square and rectangular shape. I've wound with rectangular 2.5x1.25mm, it was stiff but still ok to work with. I got close to 65% fill if i remember correctly which is at the top end of the winding scale. The parallell wire winds get crossed and lose fill so easily, they are only bett...
by larsb
Feb 11 2019 2:27pm
Forum: Motor Technology
Topic: APL's DIY axial-flux motor
Replies: 182
Views: 4090

Re: APL's DIY axial-flux motor

You know, there's never any "need" for backiron. You can always use more magnet material or copper wire :D It's that it's an effective and cheap way of getting high field strength. Backiron together with halbach is also good for the field strength, off course you need less magnets in this case. Madi...
by larsb
Feb 11 2019 3:21am
Forum: E-Bike General Discussion
Topic: Newbie project for commuting ebike - Help plz!
Replies: 70
Views: 1413

Re: Newbie project for commuting ebike - Help plz!

OK, understood :D

I'll write a complete "this is what i'd get for a 700usd conversion" list this evening. But a question: is the 400USD bike included in the 700 so you only get 300 usd for parts? That's about impossible..
by larsb
Feb 11 2019 2:29am
Forum: E-Bike General Discussion
Topic: Newbie project for commuting ebike - Help plz!
Replies: 70
Views: 1413

Re: Newbie project for commuting ebike - Help plz!

Yah, everyone can think for themselves? It's just to provide info on the available choices. You take it too seriously, it's not an order list we're writing, he'll have to do the thinking and full calculation :D Never mind the battery pack, it is what i first used myself. There are several bottle/dol...
by larsb
Feb 10 2019 5:25pm
Forum: E-Bike General Discussion
Topic: Newbie project for commuting ebike - Help plz!
Replies: 70
Views: 1413

Re: Newbie project for commuting ebike - Help plz!

Am i missing something? is the bike cost included in 700USD max? Otherwise it doesn't look too hard, depending on if customs get you with the tax: Skärmavbild 2019-02-10 kl. 23.17.16.png and as i stated before, skip the brake sensors, they are too poor quality to use or pay for motomech is right tha...
by larsb
Feb 10 2019 4:22pm
Forum: Motor Technology
Topic: APL's DIY axial-flux motor
Replies: 182
Views: 4090

Re: APL's DIY axial-flux motor

You're missing the effect of the backiron to increase the magnetic field strength in the air gap.

As stated above: roughly 2x magnet material needed for same field even though you have a Halbach array.

Without the halbach it's even less field strength than that..
by larsb
Feb 10 2019 1:08pm
Forum: E-Bike General Discussion
Topic: Newbie project for commuting ebike - Help plz!
Replies: 70
Views: 1413

Re: Newbie project for commuting ebike - Help plz!

nomidis wrote:
Feb 10 2019 11:40am
Sorry, my mistake, I updated now, I meant 2 rides/week.. :oops:
let's say a q128 lasts about the same in greece, then you'd be able to use the kit for 2x per week/50wks per year/15km for nearly 7 years. by that time you'd wished you'd bought a mac :D
by larsb
Feb 10 2019 11:49am
Forum: E-Bike General Discussion
Topic: Newbie project for commuting ebike - Help plz!
Replies: 70
Views: 1413

Re: Newbie project for commuting ebike - Help plz!

Yes! Not a problem in greece, i'd guess :D
by larsb
Feb 10 2019 11:35am
Forum: E-Bike General Discussion
Topic: Newbie project for commuting ebike - Help plz!
Replies: 70
Views: 1413

Re: Newbie project for commuting ebike - Help plz!

Daily and weekly are different things. My q128 was ok for 10000km before it gave up due to bearing failure and rust, not bad for the low cost and to do a tryout of ebiking but today i wouldn't buy it since it was a bit stressed on the steeper uphills.
by larsb
Feb 10 2019 11:11am
Forum: E-Bike General Discussion
Topic: Convince me to upgrade to a sine wave controller.
Replies: 25
Views: 948

Re: Convince me to upgrade to a sine wave controller.

Adapttos.. Forget them. I have two on the scrap heap. And so does everyone else that bought one it seems.
by larsb
Feb 10 2019 10:53am
Forum: E-Bike General Discussion
Topic: Newbie project for commuting ebike - Help plz!
Replies: 70
Views: 1413

Re: Newbie project for commuting ebike - Help plz!

I'd recommend the mac motor since they have a solid reputation here. I've been commuting myself on q-128 and it's ok but you soon realise that the cost difference per ride if you commute makes it totally worth it to buy the best quality parts.. If you can afford it at all. You don't need brake senso...
by larsb
Feb 09 2019 1:44pm
Forum: E-Bike Technical
Topic: Programming APT AE96600 controller
Replies: 30
Views: 949

Re: Programming APT AE96600 controller

My bike is still broken so no trials done yet..

I will soon start a new thread on the battery build :D
by larsb
Feb 09 2019 1:37pm
Forum: Motor Technology
Topic: Have to re-adhere one magnet; should/how to remove adhesive the rest?
Replies: 6
Views: 211

Re: Have to re-adhere one magnet; should/how to remove adhesive the rest?

I'd say both are good enough, high temp resistance glues with strength. DP420 seems superior based on the datasheet. If you don't already have a dispenser gun then I'd still say the 331 is the best since it is single component and you have zero risk for issues caused in the mixing of base and harden...