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  1. S

    Hall spacing for 6 pole 27 slot motor

    Can anyone help where to place the halls for such a motor? I tried the mercedes but it's awful. My guess is tho that it should be placed 40 mech degrees apart that is every 3 slots because the my 1020 also uses 40 mechanical degrees spacing for the 6 pole motor. Am i figuring it well?
  2. S

    Separate bettery packs in parallel

    Given an engwe bike added another dp6 on top of the frame to the stock battery. I put them in parallel with commonport BMSes. It was working fine until it got depleted and i presume the low voltage got tripped with the aftermarket pack and ever since then the bms is dead. It's not my bike so it...
  3. S

    Rickshaw mid drive systems (fuk cyclone)

    I'm seriously vacilating between the 40H and the 60H mid drives. The 40H is 3200 rpm 48v 4kg and the 60H is 3200 60v 5.4kg. The plan is either buy the small with a far driver 72300 (s12) spun at 7k rpm at 21s with around 170% flux weakening with a 10.2 to 1 reduction giving around 85 kph top...
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    Mxus 30H winding temp

    Does anyone know the insulation class for the Mxus 30H?
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    Cyclone efficiency conundrum

    Does anyone know what is going on with these cyclone motor datas? The efficiency is all over the place on the website. Sometimes it says 88.89% which doesnt even make any sense specifying to hundredth so it seems like data totally pulled from a$$ even specifying to tenth makes no sense. Then the...
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    Yuyang King controller regen question

    Some say the regen works only below 72v others say it worx up to 84. What is true? What is the voltage range of the regen? Can it be adjusted?Maybe related to overvolt and undervolt protection. Nothing turns out from the manual in this regard.
  7. S

    Kelly KAC AC controller renault twizy

    Does anyone have proper setup for kelly KAC7275 and renault twizy motor? I just cant make it work. It spins the motor relatively well no load but as soon as on the ground it almost shakes the chassis apart. With very little throttle it kinda rolls but only very slowly as soon as more thorttle...
  8. S

    ZL 1500w 48v hub motor

    Does anyone have experience with this motor? How wide is the stator? No vendor seems to know.
  9. S

    Votol vs. Sabvoton for Qs mid drive

    I have a 138 90H and a sabvoton 200 but I've heard that the votol is a better match for the mid drives. Can someone confirm this? What is the difference? (Maybe the Votol can take better advantage of the reluctance torque of the rotor in a flux weakening scenario or even in a non flux weak...
  10. S

    Greentime 48v regen efficiency

    I had a 72 volt greentime controller once. It was a very good controller, but its regen had very bad efficiency maybe 40% of the energy went back to the battery and the rest heated the motor like crazy. Does anyone know whether the 48volt version has this problem? Or the 48 volt version has...
  11. S

    Votol Em50 regen

    Does anyone have experience with the em50's regen? Is it efficient regen meaning that it fully - or almost fully - regenerate the kinetic energy at high efficiency or is it some sorta half ass regen where some of the current goes back to the pack and some of the current heats up the windings...
  12. S

    Renault Twizy stock sevcon controller in a microcar problem

    I've got a twizy motor with the stock renault-sevcon controller. Is there any chance that I can transplant this set to a microcar? Does anyone know how to wire the controller so that it works as a standalone unit outside the twizy? Is there any communications with the charger or the bms or with...
  13. S

    Qs 138 90H at 120 volts

    I am pondering the overspinning of this motor by the factor of 1.66 relative to the factory data to gain some efficiency. 1.66 times the rpm means 2.6 times less heat generated in the windings at a given output. Now of course higher rpm means more eddy current losses also more heat in the...
  14. S

    Sabvoton 96120 regen problem

    The sabvoton 96120 is supposed to have 109 maximum charge voltage (26s lion). Can anyone confirm that it actually does regen up to the 109v? I have the 72200 and it does regen right up to the 84volt max charge voltage of the 20S pack but above it it doesnt regen. Based on this logic the 96120...
  15. S

    18650 spotweld vs. solder steel vs nickel rust confusion

    I accidentally ordered 50m nickel plated steel and I thought that if spotwelding it would create corrosion problems then I go for soldering. I had some nickel strips here - which were supposed to be pure nickel - I wanted to do some test solderings to find out how viable it is and when I did a...
  16. S

    Qs 4kw mid drive gear reduction

    Can someone tell me what gearing should I use for this motor? 130/70 R17 is the wheel approximately 2 meter circumference. 21S lion pack. The aim is 120 kph top speed. I have the 14T sprocket. Thanks
  17. S

    Sabvoton 72xxx 21S regen

    Does anyone know if this controller will work properly with a 21S ion pack? It's supposed to work up to 90 volts so I am sure it will work forward no problem what I am curious about tho is whether the regen will work all across the operating voltage range? Thanks
  18. S

    Bionix rewind

    Does anyone know what the kv of this motor is? I couldnt yet test this cause it's a scrapped one. I find the wire waaay too thin. It's like one thin wire with 30-40T I cant imagine how this motor can produce a decent speed with such a winding. Also I'd appreciate if someone could tell me the max...
  19. S

    Sabvoton 72200 unlock help

    Can someone help with setting the parameters for my unlocked 72200? I want battery amps to be 350. I set the "Dc limit current to 350A" the boost dc current" to 350A. I think it's fine so far. The maximum "max phase current" I can set is 600. I think it's also fine considering that it was 450A...
  20. S

    Sabvoton 72200 unlock

    Is there any way to unlock the 72200 or should I resort to the good ol' shunt mod? Thanks for the help
  21. S

    Votol vs Sabvoton

    I am building an aprilia rs50 conversion and perfectly clueless as to what controller to buy. Svmc 72150, em150 and em 200 are the candidates. I have no idea what this rated current, boost current, peak phase current and phase current protection means. I mean the kellys are at least...
  22. S

    Liitokala 100ah lifepo

    € 41,07 41%OFF | LiitoKala 3.2V 100Ah LiFePO4 battery can form 12V battery Lithium-iron phospha 100000mAh Can make Boat batteries, car batteriy https://a.aliexpress.com/_mLVhuKp I am building an aprilia rs50 conversion with qs 4000w motor and votol em150 controller. I am vacillating between...
  23. S

    3kw goldenmotor overvolting

    I am planning on building an aprilia rs50 conversion with a GM3kw motor. The kelly 144v controller seems to be the highest voltage controller that still isnt astronomically expensive however the motor is rated at 72v which I find quite low. What would be the consequences of overvolting such a...
  24. S

    High voltage controller

    I am planning on building a semi race bike from scratch custom frame and all, but the highest voltage bldc controller I can find is 144v which I find too low. I dont want any compromise once I put so much effort into this project to even build my own frame. I'd want a 288v controller or...
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