Search found 2365 matches

by madin88
Jan 17, 2018 1:28 pm
Forum: Motor Technology
Topic: middrive motor, small and powerful -> Neu 8057/75 or??
Replies: 22
Views: 1250

Re: middrive motor, small and powerful -> Neu 8057/75 or??

Is the intro pricing still available? yes Are you mounting Halls in the NEU motor? Did you talk NEU into adding them? Did you tell them what you were doing with it or get any feedback or tech support from them? I'm curious if they are bike friendly or if they said "airflow, prop, blah blah ..... no...
by madin88
Jan 17, 2018 12:06 pm
Forum: Motor Technology
Topic: Idiots guide to water cooled mid motor making
Replies: 101
Views: 4146

Re: Idiots guide to water cooled mid motor making

Initial plan was to let the water pass through the stator hub to cool coils indirectly, the design evolved to cooling of all the coils directly by giving the stator assembly a shell and run water through the whole assembly. It looks doable with clearance to stator sideplates and coils. Biggest issu...
by madin88
Jan 16, 2018 3:33 pm
Forum: Motor Technology
Topic: middrive motor, small and powerful -> Neu 8057/75 or??
Replies: 22
Views: 1250

Re: middrive motor, small and powerful -> Neu 8057/75 or??

If you go the beltdrive route, you can manufacture the large pulley from a metallic hub and spokes with a 3dprinted belttrack in segments depending on printersize. As there are so many teeth gripping on the large pulley, a properly made 3dprinted one out of abs/petg/ or even pla should work well. I...
by madin88
Jan 09, 2018 3:42 pm
Forum: E-Bike Technical
Topic: Small 72v 50A controller
Replies: 9
Views: 521

Re: Small 72v 50A controller

I had it in memory that i could choose 70% batt current on the KBS48121-X which i used for some bikes when i was working for an e-bike company and i also have something about different firmware versions in my mind, but thats already more than two years ago so please don't nail me down on this.
by madin88
Jan 09, 2018 2:26 pm
Forum: E-Bike Technical
Topic: Small 72v 50A controller
Replies: 9
Views: 521

Re: Small 72v 50A controller

I got the Kelly KBS72121X controller, And i looks like its capable to handle 55A FASE current, not battery current. Its only 26A battery current. Yes, it can do 55A phase current continuous and 130A peak for 10sec, but what gives you the idea that this is only 26A batt? motor current: 80% 130A * 0,...
by madin88
Jan 09, 2018 2:12 pm
Forum: E-Scooter and Motorcycle Photos & Videos
Topic: Andre´s GSXR 1000 K2 with QS Motor 273 80H, 34kW
Replies: 128
Views: 11360

Re: Andre´s GSXR 1000 K2 with QS Motor 273 80H, 34kW

Strange, your 1/4 mile time is slower than Arlo1's (12.8 sec) but your power to weight is roughly the same I guess (he has 300kW)... any idea what the reason for this is ? I guess it is input power vs output power, so the efficiency of the motor. It would be interesting to know how much of the powe...
by madin88
Jan 09, 2018 1:47 pm
Forum: E-Bike Reviews & Testing
Topic: PowerVelocity controller review
Replies: 268
Views: 8992

Re: PowerVelocity controller review

ElectricGod wrote:
Jan 08, 2018 7:01 pm
I got the new telemetry modules On Saturday. I haven't had a chance to try them out yet.
does it already feature two thermistor inputs (for controller and motor) with throttle roll back?
by madin88
Jan 09, 2018 1:39 pm
Forum: E-Bike Non-hub Motor Drives
Topic: Sur-ron Adaptto
Replies: 30
Views: 1655

Re: Sur-ron Adaptto

macribs wrote:
Jan 09, 2018 9:42 am
What is emDrive?
they make awesome controllers: https://www.emsiso.com/products
by madin88
Jan 08, 2018 3:47 pm
Forum: E-Bike Non-hub Motor Drives
Topic: Sur-ron Adaptto
Replies: 30
Views: 1655

Re: Sur-ron Adaptto

Such triple astro drive would surely be awesome, but to be honest i think it is not ideal. I would use one single motor, a 10/20kW FOC controller (ASI, emDrive) with torque control, and the most important thing: turn on regen braking. 30kW, biclycle braking system and no regen = no go. How much woul...
by madin88
Jan 07, 2018 10:56 am
Forum: E-Scooter and Motorcycle General Discussion
Topic: KTM Freeride e-xc battery voltage?
Replies: 13
Views: 243

Re: KTM Freeride e-xc battery voltage?

Seems that KTM is running a 300 v battery. Why did the KTM choose to go for such a high voltage battery pack? Are they getting any benefits from running at 300v that they couldn't get at 150v or even at 100v? The newest Freeride has 18kW peak and about 10kw continuous from what i know, so less than...
by madin88
Jan 07, 2018 4:27 am
Forum: E-Bike Non-hub Motor Drives
Topic: Sur-Ron - New Mid drive Bike from China
Replies: 363
Views: 18839

Re: Sur-Ron - New Mid drive Bike from China

What would it take to setup regen? At least nothing in the drive train (basically you can see it like a DD hub motor)^^ the questions are: - does the controller feature regen braking (variable or with button), and can the BMS forward the current - would there be enough space on the handlebar for a ...
by madin88
Jan 06, 2018 5:04 am
Forum: E-Bike Non-hub Motor Drives
Topic: Sur-ron Adaptto
Replies: 30
Views: 1655

Re: Sur-ron Adaptto

motomoto wrote:
Jan 06, 2018 1:37 am
It is a 12 cell 5000mah 100c pack with a 200c peak. You can blow the whole loads in 15 seconds without the
cells even heating up!!! 20kW continuous with 40kW bursts. 3.5 lbs of battery with dual 8 gauge leads. Sweet
Amazing facts, but i thought you settle on 20s?
by madin88
Jan 04, 2018 3:40 pm
Forum: Items Wanted
Topic: Mxus Spareparts? does they exist?
Replies: 8
Views: 348

Re: Mxus Spareparts? does they exist?

@ amberwolf
the man behind WCEC is member teslanv and he has good partnership with MXUS afaik.
@ Rob
I have one V3 cover left which i don't need anymore. Some time ago i bought a few directly from the factory for my "V2 axle upgrade". It is new.
Send me a PM if you are interested.
by madin88
Jan 03, 2018 3:05 pm
Forum: E-Bike Non-hub Motor Drives
Topic: Sur-ron Adaptto
Replies: 30
Views: 1655

Re: Sur-ron Adaptto

Do you see a possibility of adding a freewheel to the bike, madin? This is hard to say without having the bike. You probably want to have the freewheel in the rear hub for lowest drag. There are solutions for bicycle hub's (with thread), but the hub from the Surron has a bolt circle on both sides. ...
by madin88
Dec 30, 2017 6:53 am
Forum: Motor Technology
Topic: Idiots guide to water cooled mid motor making
Replies: 101
Views: 4146

Re: Idiots guide to water cooled mid motor making

There are fantastic winders out there. I salute them! Check out this thread by user 'modisc731': https://www.helifreak.com/#/topics/487902 I think you must be a member in this board as the link doesn't work, but google directed me to some threads. Man, this guy really knows how to improve the windi...
by madin88
Dec 28, 2017 3:25 pm
Forum: Items for Sale - New
Topic: Smartphone EV trip dashboard - Android/iOS - $99
Replies: 68
Views: 3716

Re: Smartphone EV trip dashboard - Android/iOS - $99

Hello , Could you please send a PayPal link or give me your PayPal user name to send $50 for the part . Also , please enclose or inform me about the install how-to . Thanks . The new BT modules are getting updates and improvements all the time i was told, so we better should wait until they are rea...
by madin88
Dec 27, 2017 5:36 am
Forum: Battery Technology
Topic: Cycle life testing : LG INR18650 MJ1 vs Sanyo NCR18650GA
Replies: 16
Views: 2598

Re: Cycle life testing : LG INR18650 MJ1 vs Sanyo NCR18650GA

Thanks for sharing the test results and your work. Compared with the MJ1 the GA has lost a lot more of the usable capacity between 4.00 and 2,8V, but between 4,2 and 2,5 it is above the MJ1. kinda strange. To improve lifetime of my batteries i personally charge to 4,1V - 4,15V intead of the 4.00V of...
by madin88
Dec 25, 2017 11:43 am
Forum: E-Bike Non-hub Motor Drives
Topic: Sur-Ron - New Mid drive Bike from China
Replies: 363
Views: 18839

Re: Sur-Ron - New Mid drive Bike from China

This thread is getting more and more OT.

Guys, please back to topic!
by madin88
Dec 23, 2017 3:05 am
Forum: E-Scooter and Motorcycle Photos & Videos
Topic: Apollo 250 Dirt Bike Conversion
Replies: 139
Views: 7231

Re: Apollo 250 Dirt Bike Conversion

That's a huge sprocket, when I wonder why can't the motor be a lower kv? If it would have lower kV it would just meen that it needs more volts and less amps for doing the same. But the torque it can produce is the SAME. for instance a 100kV motor with 50V battery and 100A controller is in terms of ...
by madin88
Dec 23, 2017 2:51 am
Forum: E-Bike Reviews & Testing
Topic: PowerVelocity controller review
Replies: 268
Views: 8992

Re: PowerVelocity controller review

In your resistance test, what voltage are you feeding the gate? I would be curious to find out why the digikey mosfets are under Rds spec. I'm not complaining...less resistance is a good thing. And why the one from the controller was dead on typical spec. Variations do occur and if you had three mo...
by madin88
Dec 22, 2017 1:39 pm
Forum: E-Bike Reviews & Testing
Topic: PowerVelocity controller review
Replies: 268
Views: 8992

Re: PowerVelocity controller review

Today i repaird the defect 12F AOT290 controller. There was a short between battery minus and the green phase (thus the low side Fet's), but the QUESTION is why this happened with only 48V battery and a small 9C DD hub motor? From what i found out the reason could have been a poor heat transfer, mel...
by madin88
Dec 22, 2017 4:00 am
Forum: E-Bike Reviews & Testing
Topic: PowerVelocity controller review
Replies: 268
Views: 8992

Re: PowerVelocity controller review

Fortunately for me, I'm not worried if you trust my tests or not. I trust them. You are publishing your test results in an open forum, writing statements that AOT290 FET's have big abnormalities. But you don't know how to measure them properly (at least at the beginning there was the thing with the...
by madin88
Dec 22, 2017 3:47 am
Forum: Motor Technology
Topic: Idiots guide to water cooled mid motor making
Replies: 101
Views: 4146

Re: Idiots guide to water cooled mid motor making

When searching for LRK winding i was going over a thread in the german pedelec forum. A guy planned to do such winding scheme because it would be less work and an easier job, but others were saying it would be not as efficient as winding every single tooth, and that it is an old technique (used 15 y...
by madin88
Dec 22, 2017 3:29 am
Forum: E-Bike Non-hub Motor Drives
Topic: Sur-Ron - New Mid drive Bike from China
Replies: 363
Views: 18839

Re: Sur-Ron - New Mid drive Bike from China

I dont know if it's the knobbies or the mid drive but it's something I noticed pretty quick. Ironic Jay, I just sent you an email asking about the performance of this bike. It seems that these bikes bursting what..6kw appear to pull harder than your 9kw Fighter. Your Teaser appears to show this. Wh...
by madin88
Dec 21, 2017 1:37 pm
Forum: E-Bike Non-hub Motor Drives
Topic: Sur-Ron - New Mid drive Bike from China
Replies: 363
Views: 18839

Re: Sur-Ron - New Mid drive Bike from China

Maybe a few e-bike builders could make a cooperative financing, to design and produce a frame similar with this, but for a speed pedalec with bicycle seat & pedals, 45km/h. 1# no more need of EU homologation, plates. 2# with an open arhitecture we could use "standard middrives" like BBSHD or Tongsh...