Search found 394 matches

by Dui, ni shuo de dui
Aug 31 2017 10:11am
Forum: General Discussion
Topic: Dogman Dans E bike burns his house.
Replies: 172
Views: 25300

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 9:43am
Forum: E-Bike General Discussion
Topic: Kelly vs Sabvoton Controller review 2017
Replies: 44
Views: 11016

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 4:19am
Forum: E-Bike General Discussion
Topic: Kelly vs Sabvoton Controller review 2017
Replies: 44
Views: 11016

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 8:29pm
Forum: E-Bike General Discussion
Topic: Kelly vs Sabvoton Controller review 2017
Replies: 44
Views: 11016

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 9:05pm
Forum: Motor Technology
Topic: Reading data from my sabvoton controller
Replies: 39
Views: 7775

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 9:01pm
Forum: Motor Technology
Topic: Reading data from my sabvoton controller
Replies: 39
Views: 7775

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 8:32pm
Forum: E-Scooter and Motorcycle Photos & Videos
Topic: Ninja 250 "Clone" Made in China
Replies: 58
Views: 13278

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 9:11pm
Forum: E-Bike General Discussion
Topic: Kelly vs Sabvoton Controller review 2017
Replies: 44
Views: 11016

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 11:20am
Forum: E-Bike General Discussion
Topic: Kelly vs Sabvoton Controller review 2017
Replies: 44
Views: 11016

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 10:05am
Forum: Motor Technology
Topic: Controller mod, what can I do with it?
Replies: 0
Views: 332

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 10:33am
Forum: E-Scooter and Motorcycle Photos & Videos
Topic: Aprilia RS50 with 4kW QS-motor 17" rim
Replies: 36
Views: 12162

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 10:55pm
Forum: E-Bike General Discussion
Topic: Kelly vs Sabvoton Controller review 2017
Replies: 44
Views: 11016

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 11:18pm
Forum: E-Scooter and Motorcycle Photos & Videos
Topic: Aprilia RS50 with 4kW QS-motor 17" rim
Replies: 36
Views: 12162

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 10:59pm
Forum: E-Scooter and Motorcycle Photos & Videos
Topic: Electric Pitbike -Motor inside front of swingarm
Replies: 3
Views: 2425

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 10:47pm
Forum: E-Scooter and Motorcycle Photos & Videos
Topic: Ninja 250 "Clone" Made in China
Replies: 58
Views: 13278

Ninja 250 "Clone" Made in China

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, not phase amps) To be tested soon: Kelly 12401, 120V (200Amps continuous) ...
by Dui, ni shuo de dui
Aug 14 2017 3:00am
Forum: E-Scooter and Motorcycle General Discussion
Topic: Use two average controllers to build a better one
Replies: 1
Views: 469

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 10:46pm
Forum: E-Scooter and Motorcycle General Discussion
Topic: Noob Attempts EV Conversion: reVOLT
Replies: 19
Views: 2324

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...
by Dui, ni shuo de dui
May 10 2016 10:01pm
Forum: Battery Technology
Topic: Ultracapacitors: how to?
Replies: 58
Views: 5948

Re: Ultracapacitors: how to?

i know the pack you have from alibaba and ebay. i have tested and repaired a few of them so far. but most of the times i had to replace the entire pack with somthing more beefy as the cost makes repair of those unlabled unknown cells virturally impossible. your pack is basically just fine for 150 a...
by Dui, ni shuo de dui
May 10 2016 2:49am
Forum: Battery Technology
Topic: Ultracapacitors: how to?
Replies: 58
Views: 5948

Re: Ultracapacitors: how to?

I don't know the full specs of my battery. The only things I know are: -Voltage: 72V theoretical (but actually, the readings I have from my voltage sensor are 86V right after being fully charged and 77V being the minimum usable. If the battery voltage is 77V stabilized with no load, and then if I ac...
by Dui, ni shuo de dui
May 09 2016 1:54am
Forum: Battery Technology
Topic: Ultracapacitors: how to?
Replies: 58
Views: 5948

Re: Ultracapacitors: how to?

Ah I'm stupid I did calculate with 50F but wrote 30F. According to these maths we'd end up with 1952W/second floor 30F and with 50F 3199W/second ! That's huge. And that's just like 180/200Gr add to your build, charged in couple seconds? I actually find it interesting. :D Well, that's not very huge,...
by Dui, ni shuo de dui
May 05 2016 10:53pm
Forum: Battery Technology
Topic: Ultracapacitors: how to?
Replies: 58
Views: 5948

Re: Ultracapacitors: how to?

At first, I have one question. lets say I have a bunch of condensors wired up in series to reach 80Volts. Condensers are 3 Farad. How much capacity does this represents in terms of Ah? Is there any formula that can determines this easily? LOL 3 farad? Why not expect to power your bike on 3 AA batte...
by Dui, ni shuo de dui
May 05 2016 10:42pm
Forum: Battery Technology
Topic: Ultracapacitors: how to?
Replies: 58
Views: 5948

Re: Ultracapacitors: how to?

80V / 2.5V (per capacitor) = 32 caps. If they are 3 Farads each, then the capacitance of the series string will be 3/32 = 0.09375 Farads. Total stored energy of the 32S string will be 1/2 CV^2 = 0.5*0.09375*80*80 = 300 joules. A joules is one watt-second, so 300/3600 = 0.083 watt-hours. At an avera...
by Dui, ni shuo de dui
May 04 2016 2:28am
Forum: Battery Technology
Topic: Ultracapacitors: how to?
Replies: 58
Views: 5948

Re: Ultracapacitors: how to?

I don't really want to start a big Internet fight, but I pretty much agree with what TheBeastie stated. What I want is to find out how to do it, I'm pretty much aware of the issues/downsides of using capacitors and why this doesn't fit a high capacity application. But first, this is not for high cap...
by Dui, ni shuo de dui
May 03 2016 9:39pm
Forum: E-Scooter and Motorcycle General Discussion
Topic: Motorino XPn 2011
Replies: 458
Views: 86232

Re: Motorino XPn 2011

Thanks, I like things to look factory as much as possible. The Leafs are the best bang for your buck but there are better alternatives. I did put a sprocket on, I just did not post about it. I grinded off the threads and it just slips over the motor shaft and sits there with the chain on. It doesn'...
by Dui, ni shuo de dui
May 03 2016 9:13pm
Forum: E-Scooter and Motorcycle Photos & Videos
Topic: My Performance Chinese E-Scooter
Replies: 23
Views: 8924

Re: My Performance Chinese E-Scooter

Dui, ni shuo de dui Nice Scooter, I have a very similar specced scooters. I have just got my Emax 110s upgraded to 60ah large format Calb lifepo4. I was going to use a Sabvoton controller like yours and ES user:Flexy and a few others on here. (there is a spreadsheet somewhere on here for the config...