Search found 52 matches

by Dui, ni shuo de dui
Nov 23, 2017 5:22 am
Forum: E-Scooter and Motorcycle Photos & Videos
Topic: My Electric Motorbike
Replies: 16
Views: 1090

Re: My Electric Motorbike

High performance and lead simply don't belong in the same sentence. Regarding some low power craptastic lithium scooter pack, I wouldn't waste my time. I use automotive grade cells to build my packs, so I get safety, high power, long life, and low price all in one package. In the long run the lithi...
by Dui, ni shuo de dui
Nov 20, 2017 10:42 pm
Forum: E-Scooter and Motorcycle Photos & Videos
Topic: My Electric Motorbike
Replies: 16
Views: 1090

Re: My Electric Motorbike

Once you go lithium, you'd never even consider going back to lead batts. It depends. I have a huge 72V 50Ah lithium battery on my electric scooter. It is nice, but it could not handle the current demand for a continuous 200Amps controller without cutting instantly. I'm currently at the very limit o...
by Dui, ni shuo de dui
Nov 20, 2017 10:16 pm
Forum: E-Scooter and Motorcycle Photos & Videos
Topic: My Electric Motorbike
Replies: 16
Views: 1090

Re: My Electric Motorbike

Stubbornness rarely trumps science, I know as I time and time again started down the samt path. Stubborness means that someone would persevere in the same path with no regards to whatever suggestions or facts other people are presenting.... I just said that I changed my mind and won't change my mot...
by Dui, ni shuo de dui
Nov 20, 2017 1:07 am
Forum: E-Scooter and Motorcycle Photos & Videos
Topic: My Electric Motorbike
Replies: 16
Views: 1090

Re: My Electric Motorbike

You might wanna consider taking John's advice. He knows. Well, maybe. But that's just not what I experienced. Anyway, I don't think I'll do that just yet, I've got other plans :) I noticed you got SLA batteries. If you swap that battery for a proper e-battery you probably would have both lighter we...
by Dui, ni shuo de dui
Nov 20, 2017 12:52 am
Forum: Battery Technology
Topic: Prismatic cells: the easy way to lithium?
Replies: 8
Views: 388

Re: Prismatic cells: the easy way to lithium?

Well, that's a bummer :( But I'm not sure about the figures you guys mention. For instance, I have a 72V 50Ah liFePo4 battery on my electric scooter. Controller delivers 150A continuous and 380A peak and the battery still works just fine after two years of daily use, riding full speed all the time. ...
by Dui, ni shuo de dui
Nov 19, 2017 10:42 pm
Forum: E-Scooter and Motorcycle Photos & Videos
Topic: My Electric Motorbike
Replies: 16
Views: 1090

Re: My Electric Motorbike

I'm not sure what makes you think that torque motor is "a myth". I tried various versions of QS motors, torque/balanced and speed and I can tell you that there is a difference, both in torque, speed and power consumption. Changing my motor for a smaller diameter is really not an option, since it wou...
by Dui, ni shuo de dui
Nov 16, 2017 4:21 am
Forum: Battery Technology
Topic: Prismatic cells: the easy way to lithium?
Replies: 8
Views: 388

Prismatic cells: the easy way to lithium?

Hi Guys, I currently have a 72V 35Ah lead acid battery on my motorbike. It works nicely, but I find it quite a bit heavy and It only have about 35km autonomy at full speed. And now that winter is coming, the autonomy starts to drop. So, I would like to upgrade to lithium. I've spent a great amount o...
by Dui, ni shuo de dui
Nov 16, 2017 4:05 am
Forum: E-Scooter and Motorcycle Photos & Videos
Topic: My Electric Motorbike
Replies: 16
Views: 1090

Re: My Electric Motorbike

swiftyds wrote:I've been looking at importing one of these Chinese electric motorcycles into the UK. Can you tell me what the model is of yours?
Lol, I would, but as I just said earlier: I have no idea XD
by Dui, ni shuo de dui
Aug 31, 2017 10:11 am
Forum: General Discussion
Topic: Dogman Dans E bike burns his house.
Replies: 162
Views: 10006

Re: Dogman Dans E bike burns his house.

Sorry for what happened to you Dogman, I wonder, why you people are using those types of lithium battery chemistries? Why not LiFePo4, which is a lot safer. Ok, power density is a bit lower, but for a small 48V 20Ah battery it wouldn't make such a difference. I'm curious to know why, is there some r...
by Dui, ni shuo de dui
Aug 31, 2017 9:43 am
Forum: E-Bike General Discussion
Topic: Kelly vs Sabvoton Controller review 2017
Replies: 36
Views: 1524

Re: Kelly vs Sabvoton Controller review 2017

The 72150 is 150 amp draw going by the spec sheet. 350 phase amps. http://www.sabvoton.com/product/72v-6kw-brushless-motor-controller.html#.WagOHEqGORs If it ends up being too big- powerful for my lightweight ebike, it may end up on a golf style - work cart I have in the works. Nothing can ever be ...
by Dui, ni shuo de dui
Aug 31, 2017 4:19 am
Forum: E-Bike General Discussion
Topic: Kelly vs Sabvoton Controller review 2017
Replies: 36
Views: 1524

Re: Kelly vs Sabvoton Controller review 2017

I have Kelly KLS 7230s. But I d like to know if Sabvoton has immediate and precise throttle response ? Because I am not completely satisfied with Kelly. It is OK, but there is some small delay for throttle response, not big but is. Also maybe I d like to know, which model do you have, and if you ha...
by Dui, ni shuo de dui
Aug 30, 2017 8:29 pm
Forum: E-Bike General Discussion
Topic: Kelly vs Sabvoton Controller review 2017
Replies: 36
Views: 1524

Re: Kelly vs Sabvoton Controller review 2017

ZBlu wrote:Now I'd really want to see a comparison between a Kelly sine wave and a sabvoton :P
I would be happy to make one.
Just send me a sinewave Kelly, or send me a check so I can purchase one for testing :D :D
by Dui, ni shuo de dui
Aug 27, 2017 9:05 pm
Forum: Motor Technology
Topic: Reading data from my sabvoton controller
Replies: 15
Views: 546

Re: Reading data from my sabvoton controller

How do you plan to initialize the steppers?
Steppers cannot memorize their position after shutdown, so will you have some kind of endstop to caibrate it at startup?

This part is really not a problem for me but I'm curious about how you plan to do it,
by Dui, ni shuo de dui
Aug 27, 2017 9:01 pm
Forum: Motor Technology
Topic: Reading data from my sabvoton controller
Replies: 15
Views: 546

Re: Reading data from my sabvoton controller

Absolutely awesome, a gillion thanks to you Manny! I'm still not sure about how this protocol works exactly (I'm not really a programmer), but I'll try the code that you provided and see if I can extrapolate the other data. I would like to display the followings on my dashboard: -Battery voltage (sh...
by Dui, ni shuo de dui
Aug 27, 2017 8:32 pm
Forum: E-Scooter and Motorcycle Photos & Videos
Topic: My Electric Motorbike
Replies: 16
Views: 1090

Re: My Electric Motorbike

macribs wrote:Nice. What model is that bike originally?
I don't really know. Seems to be a Chinese 250 or 150 cc motorbike, I don't think it has been copied from any japanese model (at least, not 100% copied, but it looks very similar to the Kawasaki Ninja 250)
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by Dui, ni shuo de dui
Aug 24, 2017 9:11 pm
Forum: E-Bike General Discussion
Topic: Kelly vs Sabvoton Controller review 2017
Replies: 36
Views: 1524

Re: Kelly vs Sabvoton Controller review 2017

Those KLS-H Kelly controllers look good though, completely weather sealed (IP66), sinewave, have canbus support, bluetooth support, higher voltage and more current. They also have some neat features like separating eBrake cut-off and regen, so you can have your brakes cut power to the motor, and ha...
by Dui, ni shuo de dui
Aug 21, 2017 11:20 am
Forum: E-Bike General Discussion
Topic: Kelly vs Sabvoton Controller review 2017
Replies: 36
Views: 1524

Re: Kelly vs Sabvoton Controller review 2017

I own 2 Sabvoton, a 72150A new generation and a 72200A (software unlocked to 200A), previous version. How did you manage to unlock the controller? Is there a update or what must be done? I wish I had the answer to this question... I've bought it unlocked, no Idea how this was done, the seller didn'...
by Dui, ni shuo de dui
Aug 18, 2017 10:05 am
Forum: Motor Technology
Topic: Controller mod, what can I do with it?
Replies: 0
Views: 104

Controller mod, what can I do with it?

Hi guys, I have a few controllers that I don't use, since they are not powerful enough regarding my needs. I think I have 5 controllers of 80A and one other of 100A, just classic random chinese square wave controllers. Most of them Yuyang King. Anyway, I would like to use them to experiment and lear...
by Dui, ni shuo de dui
Aug 17, 2017 10:33 am
Forum: E-Scooter and Motorcycle Photos & Videos
Topic: Aprilia RS50 with 4kW QS-motor 17" rim
Replies: 26
Views: 4297

Re: Aprilia RS50 with 4kW QS-motor 17" rim

Manny wrote:
i will probably write a post or topic about it, with some arduino sample code.
Please, please do it for us noobs!!
That would be some epic stuff to know, I have so many things I would like to display on my dashboard from the sabvoton...
by Dui, ni shuo de dui
Aug 16, 2017 10:55 pm
Forum: E-Bike General Discussion
Topic: Kelly vs Sabvoton Controller review 2017
Replies: 36
Views: 1524

Re: Kelly vs Sabvoton Controller review 2017

I own 2 Sabvoton, a 72150A new generation and a 72200A (software unlocked to 200A), previous version I've also got a Kelly KHB12401. So far, I tested all those controllers on a 72V 35Ah lead acid battery, on my electric motorbike, with 16 inches 3000W QS V3 high speed motor. I'll only talk about the...
by Dui, ni shuo de dui
Aug 14, 2017 11:18 pm
Forum: E-Scooter and Motorcycle Photos & Videos
Topic: Aprilia RS50 with 4kW QS-motor 17" rim
Replies: 26
Views: 4297

Re: Aprilia RS50 with 4kW QS-motor 17" rim

Amazing skills here! I'm pretty curious about how you plan to do this: "A arduino will read data From the sabvoton and sets the steppers accordingly. The temp dial will become the battery indicator and the rev counter will become the power meter." I get the Arduino to stepper part, but how do you pl...
by Dui, ni shuo de dui
Aug 14, 2017 10:59 pm
Forum: E-Scooter and Motorcycle Photos & Videos
Topic: Electric Pitbike -Motor inside front of swingarm
Replies: 3
Views: 498

Re: Electric Pitbike -Motor inside front of swingarm

Beautiful bike, love it!

This underground spot is totally insane, what is this crazy place?
by Dui, ni shuo de dui
Aug 14, 2017 10:47 pm
Forum: E-Scooter and Motorcycle Photos & Videos
Topic: My Electric Motorbike
Replies: 16
Views: 1090

My Electric Motorbike

Hello everyone, A little topic to present my new e-motorbike. Specs: -Motor: QS 3000W V3 High speed version -Controller: Currently tested: Yuyang King 100 Amps, Sabvoton 150 Amps and Sabvoton 200Amps (battery continuous draw) To be tested soon: Kelly 12401, 120V (200Amps continuous) -Battery: SLA 72...
by Dui, ni shuo de dui
Aug 14, 2017 3:00 am
Forum: E-Scooter and Motorcycle General Discussion
Topic: Use two average controllers to build a better one
Replies: 1
Views: 176

Use two average controllers to build a better one

Hello Everyone, I have something in mind, but I'm not sure if this could work. Here it is: I've got two identical controllers (Yuyang king 80A). They both equally suck. One of them doesn't work anymore, but I'm pretty sure it is the logic part which is fried, and not the power stage. What I would li...
by Dui, ni shuo de dui
Jun 01, 2017 10:46 pm
Forum: E-Scooter and Motorcycle General Discussion
Topic: Noob Attempts EV Conversion: reVOLT
Replies: 19
Views: 1030

Re: Noob Attempts EV Conversion: reVOLT

Go for a QS hub motor if you can. They are reliable, cheap and powerful, so it's basically a no brainer here. IMO, hub motors are the way to go, they don't use space, they have plenty of torque and they are quite efficient. Unless you plan to use some kind of gearbox, there is no point using an inbo...