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  1. crossbreak

    2019 GNG 3000W cyclone middrive

    since the discussion got OT https://endless-sphere.com/forums/viewtopic.php?f=28&t=95704&start=200#p1447418 this drive now gets it's on thread. Product page https://www.gngebike.com/gng-2019-3000w
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    Direct-Drive conversion of the new GNG/cycmotor X1-pro 3000w

    Hi, the X1 should be shipped out in mid December according to Jon from cycmotor. So far we know that the motor should run at around 9000 rpm loaded with a 20s battery (the motor is ~150KV, 20s is the max voltage the controller can take) and comes with a 1:6 planetary gear reduction. The total...
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    Ultra high power 2 kW/kg fuel cell???

    never thought that this is possible, but here it is: The air cooled highpower fuel cell how could i miss this? The last mercedes benz fuel cell i heard of had around ~10kW at 200kg or so...about 30 times less power dense :shock: AC64 Fuel cell Weight: 975g, continous power: 1800W at 46.8V...
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    14s7p 50Amps Rack Battery Case Picture Review

    bought this case for $54 incl shipping to Germany here https://www.aliexpress.com/item/18650-lithium-battery-box-Rear-rack-type-electric-case-for-36V-or-48V-E-bike-battery/32767382305.html?spm=2114.13010608.0.0.q1tp2n
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    #crossbreaks' midmotor CB120

    OLD Topic Name: Custom RV120 for ebike use: group order Rv120-ES edition If you look for the CB120 go to page 6 https://endless-sphere.com/forums/viewtopic.php?f=28&t=80516&p=1277160#p1277160 The RV120pro looks like a good motor. better than RV160short and RV120short (low Km² motor constant...
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    inside Samsung 25r 18650 - save 21% weight!?

    ?
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    Anti Spark Connector for High Current AND High Voltage

    Hi, after some friends burned their resistors in their XT90s connectors again, i'd like to try something new. XT90S are fine but they have limitations: :) hardwearing, you may even step on it without breaking it :) foolproof, you cannot plug it were it does not belong :) bend protection :)...
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    74V 2000W charger for $139 any good?

    Hi, atm I am using a bmsbattery EMC900 charger and a 240W Meanwell charger for my 13s 48V setup. Bought the EMC900 for a 20s pack originally, but it had 63V caps inside :oops: which blew after a few charges to 84V. I swapped them and sold the 20s battery. I am again thinking about another...
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    Low pole count hub motor

    Hi, i am searching for a low pole count motor with high copper content that is reasonably lightweight to put into a mid-drive and rev at higher rpm: up to 1500rpm. For these high rpms it should be low pole count to keep iron loss reasonably low . Unfortunately it's hard to get hands on such a...
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    New Kelly pseudo FOC controller series

    Here are the new Kelly controllers, introducing FOC and an Anroid App. Seems like they will be programmable like the older series ones vie RS232-> USB adaper, too Delivery date is not confirmed yet to my knowlage SPECS for the smallest modell KLS6018S...
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    Super Commuter: 6T MAC 48V/120A Kelly in a 26" rim

    Some pics of my last built. Did 4 bikes with mentioned motor and controller. Bought them from cell man. Works good. The whole system is intended to be fool proof. As these bikes are commuters, they have to be reliable. So I chose components that are known to be reliable. The battery is...
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    Measure Hubmotor Temp WITHOUT additional Wire

    Hi, i'd like to add a temp sensor to a hub. But i am too lazy to pull out the wires and push them back through the hollow axle just to add one tiny wire. So i ask myself how i can measure coil temp using only the existing hall sensor leads. Sure i could run sensorless, but that sucks at...
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    Home made 20s4p Downtube Pack

    Hi, this is how i wanna built my first pack for mounting below the downtube. Encasement will be from 2mm thick alloy, isolation to the alloy from 1mm PVC + heatshrink. I still think about what to use as damper material between cells and alloy case. The material should be well heat conducting...
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    Open Source Motor/EV Simulator

    Happy to announce: My first, still buggy version of my Motor simulator. Thanks to turbo1889 and miles for helping me on this. Not an EV Sim yet.. but it will become one. If you find bugs, plz report / fix Sources...
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    Spot Welding Battery Packs

    After some request i now summarize the stuff i learned from schwibsi who built a nice welder and some others, using simple tools.. Posted my progress in his thread, which was a bit OT http://endless-sphere.com/forums/viewtopic.php?f=31&t=50015&start=75#p869087 ..sry for that. Now here is room...
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    geared MAC timing issues

    Hi. I bought a MAC upgrade 10T from cell_man. I have some issues with the timing/halls. I connected them with matching colors to a Kelly KBS since this seems to be the "best" hall/wire combination that i have tried. Problem is: It runs very quiet smooth but it has horrible efficiency, pulls 600W...
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    Programming the Bafang Middrive BBS01+BBS02

    I'd like to start a new thread about this... I had a hard time to find all of the info i need in the other thread.. so here is a start. all i know is that: we need': -A TTL converter (cheap off ebay) -A special cable -A computer and a software any more? hope this is a start.. Don't forget...
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    BIG BLOCK alternative Motor

    This discussion actually started here: http://endless-sphere.com/forums/viewtopic.php?f=28&t=42785&start=3125#p856766 about this motor: Sources: Mr Tao: http://www.mistertao.com/beta/pages/item/36266184609.html e-bike-diffusion...
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    custom rear hub with dual disc flange for sprocket

    I'd like to have a rear hub with additional 6-hole disc flange on the right, to be able to mount a sprocket. Mounting it on the left (disc brake) side is not possible with many frames. Another reason is that I'd like to keep the brake dust away from the chain/belt, as well as keep chain...
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    EB312 + BPM in Delta = synch loss??

    I have a Bafang BPM, Code11, terminated Delta, an EB312 sensorless controller, programmed 65A battery, 100A phase current. When accelerating, it starts to hassle. From the dead stop it is fine, but when speed rises, it start to hassle. the SQUEAL is NOT the brake :evil: Simple question: Is...
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    KU63 doesn't selfstart after changing FETs

    I "repaired" a KU63 that had a blown FET today. Thought it would be a nice idea to change the cheap FETs for IRFB3077. Now it does run again if i turn thet he motor shaft by hand and hit the throttle, but it doesn't self start anymore. I had no idea how to test the FETs really, so I just...
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    Endless Sphere T-Shirts?

    I wonder where to get a T shirt? Just made my own, was quite simple using Photoshop. For anyone who does not own PS, here I added the logo with alpha channel background, so you can use your favorite shirt color... like pink for example, it doesn't have to be as boringly black as mine. Any...
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    My cheap 45kph ebike for everyone

    Hi, I build so many ebikes, I almost can not count them. What I want now is a cheap and powerful commuter that serves the needs of beginners. Here is my setup: what it has to do: *travel 30km @ 45kph or 60km@30kph *1/2kWh battery parts list: -20" full suspension foldable frame -cheap torque...
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    Automatic Servo Controlled Derailleur and internal gear hub

    I wrote this into the wiki, since I found no code to feed my Arduino that should control my derailleur. hope that people who do this post more of it :D My servo sits in the frame not on the derailleur, but i still need this code :x wiki entry...
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    Motor test bench using Hantek-1008 oscilloscope ODD READINGS

    Hi, i'd like to build a Motor test stand for both friction drive and hub motors. Two motor work agains each other, one as motor, one as generator. As a load I want to use cheap $0.30 12V Halogen Lamps and some FETs that do PWM between the 3 phase leads. Primary setup: MagicPie2 against N6354...
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