Search found 267 matches

by qwerkus
May 23 2019 1:45am
Forum: Motor Technology
Topic: My1020 / Kunray / YaLU 1000 - 2000W motor ?
Replies: 10
Views: 120

Re: My1020 / Kunray / YaLU 1000 - 2000W motor ?

Ask and you shall receive! Ubercool, thanks a lot. Copper fill seems not bad at all. On the other hand, it looks like a pretty tight fit. No chance to trim the 124mm version of this motor to around 100mm. Well, that settles it. The rotor seems rather long but tiny. Smaller dia. than the bbshd. Only...
by qwerkus
May 22 2019 5:11pm
Forum: Motor Technology
Topic: My1020 / Kunray / YaLU 1000 - 2000W motor ?
Replies: 10
Views: 120

Re: My1020 / Kunray / YaLU 1000 - 2000W motor ?

here is certainly a big gap in the 2-3kw chain drive motor space. Lots of motors out there with crappy 0.5mm lams and ~85% efficiency, where another ten or twenty bucks for thinner lams could get you into the low-mid 90% and dramatically higher power output from the same copper, magnet, and iron ma...
by qwerkus
May 22 2019 5:04pm
Forum: Motor Technology
Topic: Leaf / leafmotor / leafbike high efficiency 1500w motor
Replies: 1443
Views: 174763

Re: Leaf / leafmotor / leafbike high efficiency 1500w motor

A 60mph streamliner coffin might be more resource-efficient than a car, but it's almost as hostile and inconsiderate. If we can get everyone on the streets within a city moving at 20mph or less, better things will happen than only energy efficiency. Yes, it will make room for light EVs and human po...
by qwerkus
May 22 2019 4:50pm
Forum: E-Bike Build Threads / Photos & Video
Topic: Cheap Sachs XR1 upgrade
Replies: 21
Views: 516

Re: Cheap Sachs XR1 upgrade

Quick update: I found a place where you can get quality #214 T6 7075al cut to custom size. A 120T cost around 100€. Not exactly cheap,but if it saves me the troubles of a primary stage reduction, it's definitely not that expensive. Together with a 11T motor sprocket, I could nearly reach a 1:11 redu...
by qwerkus
May 22 2019 4:41pm
Forum: Motor Technology
Topic: My1020 / Kunray / YaLU 1000 - 2000W motor ?
Replies: 10
Views: 120

Re: My1020 / Kunray / YaLU 1000 - 2000W motor ?

Running one of these on a Razor kid's toy operating at 60V nominal and around 150-160 phase amps and around 120 battery amps. Cheap, relatively heavy, but not bad! We've beat and beat on it and gotten it quite hot (boiling water) with no noticeable degradation to the enamel. I am pretty sure it can...
by qwerkus
May 22 2019 2:57pm
Forum: E-Vehicles General Discussion
Topic: Cheap FOCer (VESC 4.12 based design)
Replies: 194
Views: 9098

Re: Cheap FOCer (VESC 4.12 based design)

I need a new 1000W 54V controller anyway. I'm glad that team is interested! However, you and that team may want to wait for my newer controllers. The new ones are estimated to handle up to 84V and use the better VESC 6 platform. 54V doesn't leave much margin for the Cheap FOCer. Ok,good to know. I'...
by qwerkus
May 22 2019 2:06pm
Forum: E-Vehicles General Discussion
Topic: Cheap FOCer (VESC 4.12 based design)
Replies: 194
Views: 9098

Re: Cheap FOCer (VESC 4.12 based design)

I simply don't have the time right now for both hardware and firmware development or else I would seek to add the features you have mentioned. That's what I thought. software is super time consuming. but it seems the team behind the open source firmware is also interested in your FOCer, so maybe th...
by qwerkus
May 22 2019 1:51pm
Forum: Motor Technology
Topic: APL's DIY axial-flux motor
Replies: 288
Views: 11379

Re: APL's DIY axial-flux motor

Gotta loves those little updates. The first picture stroke me as the best illustration ever for the expression "the inner guts of a motor"...
by qwerkus
May 22 2019 12:03pm
Forum: E-Vehicles General Discussion
Topic: Cheap FOCer (VESC 4.12 based design)
Replies: 194
Views: 9098

Re: Cheap FOCer (VESC 4.12 based design)

Hi Shaman, How are things progressing ? I've been checking out out VESC code, and even though the software offers a wide range of possibilities, it's definitely not ebike optimized. Implementing PAS, torque Sensors, E Brakes, progressive Regen and most importantly a display always requires some fidd...
by qwerkus
May 22 2019 9:05am
Forum: Motor Technology
Topic: My1020 / Kunray / YaLU 1000 - 2000W motor ?
Replies: 10
Views: 120

My1020 / Kunray / YaLU 1000 - 2000W motor ?

Does anyone own one of those MY1020 / Kunray / Yalu or whatever motor they are called: motor.png Super cheap and readily available. They seem to come in 2 versions: a 124mm 1000W and a 134mm 2000W. Both 107mm diameter. Weight is somewhere between 3.5 and 4kg. A version with a 4-bolts foot is also av...
by qwerkus
May 22 2019 7:40am
Forum: E-Bike Technical
Topic: Bafang G3xx series high reduction ratio geared hub motors
Replies: 33
Views: 2611

Re: Bafang G3xx series high reduction ratio geared hub motors

I am slightly concerned I'll strip gears, but I have a spare set so we will see. Does anyone know what torque / phase amps Macs or Bafang BPMs etc strip at? I'm trying to work out a safe level to run at, using the motor sim I would be at around 65nm now I think, which is above the 50nm rating Bafan...
by qwerkus
May 20 2019 12:06pm
Forum: E-Bike Build Threads / Photos & Video
Topic: Cheap Sachs XR1 upgrade
Replies: 21
Views: 516

Re: Cheap Sachs XR1 upgrade

I tried fitting a cardboard model of the setup today, and figured that: 1 - 150mm behind the seatpost, which is the minium to fit an IGH as jagshaft, is very uncomfortable. Just too wide. 2 - 100mm IGH jagshaft + 80mm motor + holder / brackets / space does not fit into this frame, at least not where...
by qwerkus
May 19 2019 10:31am
Forum: E-Bike Build Threads / Photos & Video
Topic: Cheap Sachs XR1 upgrade
Replies: 21
Views: 516

Re: Cheap Sachs XR1 upgrade

New Plan: IGH Jagshaft aka the Brompton Problem Upon witnessing the difficulty of squeezing 2x chains + 1 brake disc into 135mm without rubbing or other interferences, it seems that a single chain would solve many issues. But since I want regen, the only way to do that would be to use an IGH as a c...
by qwerkus
May 19 2019 7:37am
Forum: E-Bike Non-hub Motor Drives
Topic: YALU New BBS-Style mid drive kit with external controler
Replies: 3
Views: 198

YALU New BBS-Style mid drive kit with external controler

Anyone tried one of these: http://ueeshop.ly200-cdn.com/u_file/UPAH/UPAH714/1903/photo/92da2bb60f.jpg http://ueeshop.ly200-cdn.com/u_file/UPAH/UPAH714/1903/photo/a7a303c69c.jpg Seems cheap a good potential for a large torque motor. Though the transmission gears seem tiny. Source:http://www.yalumotor...
by qwerkus
May 17 2019 4:21am
Forum: E-Bike Build Threads / Photos & Video
Topic: Cheap Sachs XR1 upgrade
Replies: 21
Views: 516

Re: Cheap Sachs XR1 upgrade

He's not looking to drive through the IGH gears, he wants to drive the shell. Personally I'd just get a different frame with v-brakes and bolt a sprocket directly to where the disc would go. A 135mm rear doesn't offer much room. True that. Though 2hand frames with room for a custom mid drive, the b...
by qwerkus
May 16 2019 3:01pm
Forum: E-Bike Build Threads / Photos & Video
Topic: Cheap Sachs XR1 upgrade
Replies: 21
Views: 516

Re: Cheap Sachs XR1 upgrade

Update: no double chain right I did some tests today, and had to realize that a dual right chain setup is not possible on this frame, at least not with 2.4" tyres. There is between 16 and 19mm of space between the tire and the bike chain, when mounting the dished nexus sprocket outwards. Knowing tha...
by qwerkus
May 16 2019 1:52pm
Forum: E-Bike Build Threads / Photos & Video
Topic: Cheap Sachs XR1 upgrade
Replies: 21
Views: 516

Re: Cheap Sachs XR1 upgrade

I'd take a look at the QS1000 mid drive motor. It's 110mm OD but you can likely mount it ahead of the bottom bracket. Then run a first stage reduction to the left side crank before a second stage to the rear. For a commuter possibly run regen instead of a rear brake and just bolt a sprocket directl...
by qwerkus
May 15 2019 8:38am
Forum: E-Bike Build Threads / Photos & Video
Topic: Cheap Sachs XR1 upgrade
Replies: 21
Views: 516

Re: Cheap Sachs XR1 upgrade

In the recommended parts list is this "165mm billet 6061 wheel hub with 4140 chrome moly axle" Thanks. I knew about the qulbix hub; sadly only for fatbikes. LR was kind enough to reply to my inquiry with another link: http://www.damgood.com/cycle.html This one fits into 135mm dropouts, but the pric...
by qwerkus
May 14 2019 1:28pm
Forum: E-Bike Build Threads / Photos & Video
Topic: Cheap Sachs XR1 upgrade
Replies: 21
Views: 516

Re: Cheap Sachs XR1 upgrade

An option is a custom hub made by LightningRods. He makes a hub that takes a standard gear cluster on the right side that threads onto freewheel threads. On the brake side, it has 2 sets of 6 bolt pattern. One is inset further than the other for mounting a sprocket. That sounds interesting,though I...
by qwerkus
May 14 2019 3:25am
Forum: E-Bike Build Threads / Photos & Video
Topic: Cheap Sachs XR1 upgrade
Replies: 21
Views: 516

Re: Cheap Sachs XR1 upgrade

Thanks for the awesome reply EG. As mentioned, my plan is to use the IGH-grears for human power only, while (somehow) mounting a 219 chainring directly onto the hub shell, in a direct drive setup. Only that config would give me regen,on top of sparing the rather weak IGH gears. Reading your extensiv...
by qwerkus
May 12 2019 12:38pm
Forum: E-Bike Build Threads / Photos & Video
Topic: Cheap Sachs XR1 upgrade
Replies: 21
Views: 516

Cheap Sachs XR1 upgrade

As mentioned in other threads, I moved to a very hilly region. We live on the slope of a 1400m (4593.176ft) mountain with 2 kids, so basically every commute is either rushing down or crawling up. I built a couple of ebikes for the city we lived in before, but they were no match for the new place. So...
by qwerkus
May 12 2019 9:03am
Forum: E-Bike Non-hub Motor Drives
Topic: Index of all left side chain + brake designs ?
Replies: 16
Views: 369

Re: Index of all left side chain + brake designs ?

Grantmac wrote:
May 09 2019 5:20pm
I JUST had an idea.

Use a hub with centerlock disc, then run a 6 bolt adapter and use an off the shelf 6 bolt sprocket on the back side.
May require some spacers but those are easily found.
Same here. See my new build thread.
by qwerkus
May 11 2019 10:07am
Forum: E-Bike Non-hub Motor Drives
Topic: Best internal gear hub?
Replies: 132
Views: 33443

Re: Best internal gear hub?

Any lever designed to work with caliper type road brakes works with shimano roller brakes. All you need is a so called "short pull" lever. Not sure if they also work with SA drum brakes; those seem to be "long pull" I'm aware that Shimano recommends and furnishes short pull levers for use with thei...
by qwerkus
May 10 2019 10:05am
Forum: E-Bike Non-hub Motor Drives
Topic: Best internal gear hub?
Replies: 132
Views: 33443

Re: Best internal gear hub?

Lever feel can be changed by the use of a different lever pull ratio, LIke with the Avid Speed Dial levers? Yes, those do that. But even their lowest travel setting pulls more cable than Shimano's designated roller brake levers do, so Speed Dial levers will vary from firmer than normal to a lot fir...
by qwerkus
May 09 2019 12:18pm
Forum: E-Bike Non-hub Motor Drives
Topic: Best internal gear hub?
Replies: 132
Views: 33443

Re: Best internal gear hub?

[true and just as irrelevant as quibbling about the feel of a roller brake on a hub designed for a roller brake. The 3-speed hub does what it does, correctly, and so does the roller brake. If it can skid the rear wheel-- and it can-- then there is verifiably no difference in stopping power between ...