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  1. S

    Mid Drive Steel Frame Bike 10kw Alternator Sunwin Controller

    Nice build! How many Kw did you get out?
  2. S

    Mid Drive Steel Frame Bike 10kw Alternator Sunwin Controller

    Tanks! At the moment we drive without cooling van in the motor and we reatch 55 degree i will cnc mill a van out of plastic Pom the magnets are n45 in sice 40x10x5mm the temp. limit ist 80 degree the alternator is a bosch 150a yes the rotor is aluminium and steel but it ist the cheap...
  3. S

    Light dirt bike, QS 120 70h motor, custom steel frame

    Nice build! perhaps you can mode your controller shunt it is described there very good https://endless-sphere.com/forums/viewtopic.php?t=71128 I get around 100 Amp out https://endless-sphere.com/forums/viewtopic.php?f=28&t=96858 but i dont now waht your battery does
  4. S

    Mid Drive Steel Frame Bike 10kw Alternator Sunwin Controller

    https://youtu.be/qa6eHZyfxhw
  5. S

    Mid Drive Steel Frame Bike 10kw Alternator Sunwin Controller

    Today we made a Forest test and had a problem with to mutch power :) We reatch now 66 kmh and max 10kw in fast acrelation on street . We think about make it faster up to 75 kmh that we lose some to torque. It ends with a crash 2 meter down in litle creek but we are ok.
  6. S

    Alternator BLDC Mod ~7kw

    we did some tests with 100v and 100a it runs nice but the controller reatch his rpm limit and past 6 minutes full trottle we had on the stator 25 degree centigrade but the st52 iron rotor was 52 degree centigrade the ceap 96v 1500w controller gets an shunt and conductor path upgrade we are...
  7. S

    Alternator BLDC Mod ~7kw

    until now we run the motor sensorles and if we build a rotor like the tesla it will run sensorles
  8. S

    Alternator BLDC Mod ~7kw

    Thanks yes the Tesla rotor looks good and i think we can build a rotor like this but i can`t find a seller for the electro sheet and i do not undestod how they magnets cascade
  9. S

    Alternator BLDC Mod ~7kw

    you have to measure witch both are a pair an then you do it like tchangly21 in his video https://youtu.be/wgXS6YynEVE
  10. S

    Alternator BLDC Mod ~7kw

    Thanks the fan was weldet on the old rotor at the moment we use it without fan but ther are 17mm space for a new fan
  11. S

    Alternator BLDC Mod ~7kw

    https://youtu.be/52ufo_kanYs
  12. S

    Alternator BLDC Mod ~7kw

    Hi, we build am Electric motor bike and the game is for us most power we can handle with MTB parts https://endless-sphere.com/forums/viewtopic.php?f=28&t=96858 at the beginning we just convert a bosch alternator with 103x40mm rotor to a BLDC but at 70 volt and 50 amp the magnetic field jump...
  13. S

    Mid Drive Steel Frame Bike 10kw Alternator Sunwin Controller

    now we change the wiring now from star to triangle so the speed increase from 30 kmh to 53 kmh with 70 Volt from the 18s battery the acceleration is crazy fast from 0 to 30kmh we get wheelspin or the front comes up at full throttle :D we make a video at daylight if we get some time...
  14. S

    Mid Drive Steel Frame Bike 10kw Alternator Sunwin Controller

    Thanks! here the motor after mounting the new rotor
  15. S

    Mid Drive Steel Frame Bike 10kw Alternator Sunwin Controller

    The motor in now back in place. with the new magnets the top speed go down from 37kmh to 30 kmh but now the magnetic field is stable. we change the wiring now from star to triangle so the speed increase x1,7 to 51kmh and after that we cage the battery from 18s to 24s to get 68kmh top speed...
  16. S

    Mid Drive Steel Frame Bike 10kw Alternator Sunwin Controller

    ist tig weld and the material is 5mm st52 steel so i think it will be strong enough
  17. S

    Mid Drive Steel Frame Bike 10kw Alternator Sunwin Controller

    today we install the magnets it very hard because they where very strong
  18. S

    Mid Drive Steel Frame Bike 10kw Alternator Sunwin Controller

    i hope we can test the rotor this weekend we make a video if it runs good the rotor ist cnc mill on my machine so yes if it works good i can do more
  19. S

    Mid Drive Steel Frame Bike 10kw Alternator Sunwin Controller

    Yes the seat is from a KTM sx and there it hast nearly the same position in full acceleration uphill you need to slide more to the front :wink:
  20. S

    Mid Drive Steel Frame Bike 10kw Alternator Sunwin Controller

    thanks it is TIG welding. yes we have a eye on it but it ist crasy stable. after the welding we had to bend it 1mm back ... impossible from that are the heat traces i bend it just with heat
  21. S

    Mid Drive Steel Frame Bike 10kw Alternator Sunwin Controller

    Now the parts for the alternator motor are complete. its a 36n 12p so we make 2 magnets fore eatch pole that we get 24 magnets
  22. S

    Mid Drive Steel Frame Bike 10kw Alternator Sunwin Controller

    We did some test runs and now we know the motor lose at 50 amp the magnetic field. We cnc mill a new rotor. the rotor has a 103mm dimeter and it is 40mm wide so we think it is able to run till 12 kw :o also we order a 96v sunwin controller that we can run 24s 2p 8ah
  23. S

    Mid Drive Steel Frame Bike 10kw Alternator Sunwin Controller

    Today we install the footrest
  24. S

    Mid Drive Steel Frame Bike 10kw Alternator Sunwin Controller

    the frame is around 10kg the motor 5.5 kg with 18s 24ah we hope it is around 40kg
  25. S

    Mid Drive Steel Frame Bike 10kw Alternator Sunwin Controller

    Now we install the Motor and wheels
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