Power in Flux

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frodus replied to the thread Going Brushless. Two packages, help me pick..
" Kelly specs are pretty optimistic in my experience, so maybe do some research to see what others say lately about that combo.

The me1115 (or even me1114 motor) is good, air cooled. They're the same Stator and Rotor as the ME1302/1304 respectively. I've got Sevcon files for the 1304, and we could likely modify my Size 4 file for the 1302 to fit the size 6. Might be able to find you a used Size 4 that would fit easier as well. "

10 Minutes Ago

DBCHW created the thread Are chines ebikes worth it.
" Hey guys whats up

So I am pretty new to the whole electric motorcycle scene and I was looking for an affordable bike to get me started.

I came across this one on alibaba https://www.alibaba.com/product-deta...48bd3e5fwyVtvo

Let me know what you think and if you have any other suggestions I am all ears.

Greetings from Suriname (south-America) "

1 Hour Ago

flo replied to the thread Haven't even finished the build, Should I upgrade the Power?.
" Hi
what frodus said
if you decide to upgrade to another me motor you only need to design your batery mount to fit upgrade too.
Like that you be on the road soon and an upgrade will be easy..
flo "

1 Hour Ago

flo replied to the thread Sachs xtc 125 conversion.
" Hi
managed to get left side done
slightly over 2 kg (have to use different scale) so 3,x kg so fare done.
Right plate already on the mill to get done tomorrow hopefully.
Then it`s on to the small parts ... treading and assembly

greetsAttachment 7778Attachment 7779Attachment 7780 "

2 Hours Ago

TonyHelms created the thread Going Brushless. Two packages, help me pick..
" So I currently have a Motenergy ME0907 Brushed motor and Alltrax 450A controller. The battery is an 11 Module Leaf 58Ah pack. 90V fully charged.

The ME0907 brushed motor failed in a great display of Plasma arching while riding through a busy intersection.

This is the 3rd brushed motor i've Nuked in 8 years... I'm over it, want to go Brushless. (Note, not all were Motenergy motors, and different bikes)

So here's where I sit...

Option 1: Motenergy 4201 Motor, Kelly KLS7240D. SLIGHTLY less power, but brush-less at 14lbs less then current setup. At just $1,000.

Option 2: MOtenergy 1115 motor, Curtis 1236SE-6521. Great power, great reliability, and similat weight to current setup. But a whopping $2,400.

Option 3: Slam in a Motenergy 1003 dual-brush motor and deal with DC power... $650 (Don't really want to do this, but cost is tempting)

Is anyone on here running these setups? DO you like it? Hate it? I've heard sketchy things about Kelly Controllers... Have people blown up the Brushless Kelly Controllers?

Attachment 7777

THanks for the input. "

2 Hours Ago

frodus replied to the thread Haven't even finished the build, Should I upgrade the Power?.
" After having my project linger for a long time, and switching motor/batteries/etc from brushed to AC induction, etc. I think you should get it on the road. Yes, you can always upgrade, but if you get it running, you'll have a lot of fun. The Alltrax ought to give you good power for a while. It's a 400CC bike, so should be comparable in power.

The ME1003 has the same bolt pattern as other Motenergy motors (149.2mm hole centers) like the ME1304/1302/1115/1114 motors that have very similar form factors. It'd be switching motor/controller out, maybe adding a few Leaf modules, and you can upgrade. "

2 Hours Ago

furyphoto created the thread Haven't even finished the build, Should I upgrade the Power?.
" SO, after 2 1/2 busy years, I am at the point in out house reno where I can relax a bit, and start thinking about shop space, and getting back to a "me" project. It's been a long time coming, but now I have time to sort out a space between now and the winter, and get organized to finish up the bike. My brother bought and electric VW GOlf, and loves it, and we have decided our next car will be an all electric too. I have told my wife that I will be finishing the bike over the winter, to save us gas money next summer!

My big problem now, is.. It's been so long since I bought the components, that I think I want to upgrade the power. Seems like if I am going to upgrade, I might as well do it before I get all of the motor and battery mounts fabbed up, so I don't have to do it twice. I have everything I need to get it on the road, ME1003, AXE7245, and 11 Gen 1 Leaf Modules. So I could get a decent bike together with what I have, but I feel like I might be ready for the next level pretty soon after I get it on the road.

I ride into town on my ICE 400 right now, its a bendy Hwy and there is always someone going slow, so I want to make sure I have passing power. I regularly hit 120kmh when passing 6 or 8 cars at one of the 2 straight stretches, I would like to have the get up and go to pass. BUT, Upgrading will cost some more $$$$, right now I have all the components, my only costs will be fabbing the mounts.

Do I get what I already have on the road, or do I upgrade now, before I do the build over the winter?

If I upgrade, what do I get? I was thinking I can keep the 11 leaf modules, and maybe add a few more (I have the space in the 600cc frame) and just upgrade the motor and controller. I would kind of like to keep it air cooled if possible, just to keep it simple.

What do you think? "

3 Hours Ago

Michael Moore created the thread A new style of motor.
" http://www.machinedesign.com/motion-...nk-size-weight

It mentions motorcycles and uses a BMW i3 motor in a comparison with the new design. It sounds very promising, but these things often do.

cheers,
Michael "

3 Hours Ago

Stevo replied to the thread Thinking out loud - A hybrid hack.
" Spoonman and I are on the same page. Yamaha made a 2 wheel drive offroad bike to race Dakar with.http://www.motorcyclespecs.co.za/mod...dakar%2004.htm

Not only is this the best option, I think we can all learn something here if the op goes this route. I've been wondering about 2 wheel drive emc for a while. Just the unsprung weight on the front wheel had me undecided. But on a sidehack, that wont matter so much. "

5 Hours Ago

Spoonman replied to the thread Thinking out loud - A hybrid hack.
" Yup, that much I understand, and assuming an inline arrangement, there's no problem there - a mismatch in torque between the wheels simply amounts to front to rear drive bias which won't impact on steering. What would, in the axial scenario result in one wheel accelerating faster than the other, in the inline arrangement just means one wheel get's assisted to a lesser or greater degree.

However in axial arrangement, the same method produces a left to right torque bias, which will make the setup a total pig to handle. There's has to be a primary constraint related to RPM for the sake of straight line operation off a single throttle. "

9 Hours Ago

Sarahx replied to the thread Riding the Evoke in Beijing.
" Hi! this is my site https://au.skokka.com/ "

10 Hours Ago

frodus replied to the thread Thinking out loud - A hybrid hack.
"
Quote Originally Posted by Spoonman View Post
I don't expect that would work, you might be able to balance the torque response to throttle with the main drive wheel for one gear ratio on the main engine, but as soon as you'd change gear the two would fall well out of whack. Granted, in the front wheel drive scenario rather than the sidecar scenario, that may not actually cause any significant problems.

As regards the hub motor up front, it's as viable a solution as any of the others, and I don't expect that the traction at the front wheel would be any worse than the traction available to a sidecar wheel.
Also given the nature of the bike, it's not like you're terribly concerned with high speed handling, so there's no penalty to be paid there either.
Still not so sure. Hybrids are not widespread, and I imagine it would take some tinkering but I think torque mode (as opposed to speed mode) is a the best choice for this integration.

In Torque mode, throttle 0-100% goes from 0 torque to max torque respectively, not 0- max RPM. It doesn't stabilize at a set RPM based on throttle input. In speed mode, throttle percent = 0 to max RPM, so you can set to a certain RPM and it'll sit there.

The torque you're demanding via Motor controller is going to push as demanded regardless of what gear its in. "

22 Hours Ago

Spoonman replied to the thread Thinking out loud - A hybrid hack.
"
Quote Originally Posted by frodus View Post
You can have them tied to the same mechanical throttle.
I don't expect that would work, you might be able to balance the torque response to throttle with the main drive wheel for one gear ratio on the main engine, but as soon as you'd change gear the two would fall well out of whack. Granted, in the front wheel drive scenario rather than the sidecar scenario, that may not actually cause any significant problems.

As regards the hub motor up front, it's as viable a solution as any of the others, and I don't expect that the traction at the front wheel would be any worse than the traction available to a sidecar wheel.
Also given the nature of the bike, it's not like you're terribly concerned with high speed handling, so there's no penalty to be paid there either. "

23 Hours Ago

Richard230 replied to the thread Riding the Evoke in Beijing.
"
Quote Originally Posted by Stevo View Post
He never mentioned what kind of range he was able to get?
Perhaps the Evoke doesn't have a range estimator. Or maybe he was too busy checking out the sights of Beijing and avoiding pedestrians to notice the range. You could probably figure out the range if you visited Evoke's home page and looked up their battery capacity. However, I wouldn't trust the claimed range performance of a Chinese EV manufacturer as things tend to move differently in China compared with some other countries. "

1 Day Ago

Macosie replied to the thread Thinking out loud - A hybrid hack.
" Thanks for the detailed response.
I'm not sure about the sensor approach. I think as a first EV application/attempt, it is a bit more than my current skill set.
Nice thing about a sidecar is it can store the batteries, while the ICE remains. The question is whether I would need to replace the swingers to accommodate the chain and hub. That could be solved by Stevo's front hub suggestion.
Dual throttle might work too. I'm thinking I could use thumb throttles, one on each side rather than the twist. "

1 Day Ago

Macosie replied to the thread Thinking out loud - A hybrid hack.
"
Quote Originally Posted by Stevo View Post
Wouldn't a much simpler solution be a hub motor on the front wheel? You would get the benefit of 2 wheel drive without any worries of steering problems.
I don't know if I have enough traction on the front wheel to do it, but it is an option I'll consider. I wonder about the feel of driving a front-wheel drive bike? "

1 Day Ago

Stevo clicked Likes for this post: California's Highway 1 is now open by Richard230

1 Day Ago

Stevo replied to the thread Riding the Evoke in Beijing.
" He never mentioned what kind of range he was able to get? "

1 Day Ago

Richard230 created the thread California's Highway 1 is now open.
" Here is an article from my newspaper today. Note the vehicles riding the new bypass in the photo. "

1 Day Ago

frodus replied to the thread Thinking out loud - A hybrid hack.
"
Quote Originally Posted by Spoonman View Post
Agreed Frodus, if you're happy to operate two throttles simultaneously then you don't need the control feedback from the primary driven wheel, you can just enact the control manually. Definitely an easier approach to implement, although it would take significant practice for an operator to become adept at keeping things smooth.
That wasn't really what I was trying to say. You can have them tied to the same mechanical throttle.

But, I didn't recall from earlier, this is a sidecar. So no differential, but a different motor on the outside wheel. Might not work gracefully this way. It would work if the engine/motor were coupled together as a parallel hybrid. "

1 Day Ago