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    Electric Roadster

    Sounds ok :) Some of them just rely on the pinch bolts and the flats on the shaft.
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    Electric Roadster

    Hope you have a hefty torque arm for the motor
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    Electric Roadster

    Love this build. Well done! Can't wait to see the finished product.
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    Can over-spinning a small wheel cause over-volt problems?

    Tried with and without a resister on the temperature wire, just in case there was a glitch in the software. But it still cuts out. The other day I had everything set to max fun and was doing about 40mph (no speedo) and when I shut off it didn't just cut out, it locked the back wheel for a second...
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    Can over-spinning a small wheel cause over-volt problems?

    Well I tried increasing the max phase current to 300A, but that made no difference. All the connections are good. I've tried every permutation of e-brake and regen. I've tried running the battery down. I've tried all sorts of setting including no field weakening so it doesn't go too fast...
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    Can over-spinning a small wheel cause over-volt problems?

    Seems to be getting worse. Virtually every over-run situation (shutting off) causes it to shut down. Thanks for the software Minde. I managed to turn on variable regen, but as soon as I went back to the mobile app, variable regen vanished again. The PC software seems to have made the motor...
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    Is BLDC motor field weakening bad for the magnets?

    Thanks guys :)
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    Can over-spinning a small wheel cause over-volt problems?

    Ah yes. The connections are still a bit temporary, so that’s worth remembering. But the cutoff is always after a fast section, after shutting off.
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    Can over-spinning a small wheel cause over-volt problems?

    I don't think it does write a log. Tonight, I'll try connecting the brake cutout wires, maybe that will help isolate the return voltage.
  10. D

    Can over-spinning a small wheel cause over-volt problems?

    My slow EV to fast EV moped conversion is going reasonably well, with some teething problems. It now has a Sabvoton 72150 and 20s7p pack and it goes like a little rocket. However, at the end of a fast section after closing the throttle, the Sab' cuts out and needs rebooting. Is this a common...
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    Is BLDC motor field weakening bad for the magnets?

    My understanding is that field weakening is necessary to run a motor above it's rated speed by reducing the magnetic flux. In a brushed motor the field winding current can be modified to reduce the magnetic flux, but with a brushless motor with permanent magnets, some electronic trickery is...
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    Sabvoton 72150 phase testing, no combination works

    Thank you! :)
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    Sabvoton 72150 phase testing, no combination works

    Sorry I missed your questions. I don't seem to be getting notifications. Thanks Amberwolf. Specifically, this is the phase converting connector - https://www.aliexpress.com/item/32796266176.html Does anyone have a link to the latest PC software for the 72150 please? I need more than just the...
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    Sabvoton 72150 phase testing, no combination works

    For the sake of finishing this thread off. I am up and running now. And flying! :) The halls were fine, but the motor was a 60 degree which the Sab didn't like. I fixed that with a little phase wire switch that converts it to 120. I'm now testing all the settings. Haven't managed to get the...
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    Sabvoton 72150 and 60 degree phase angle solution

    AH yes. Thanks, I didn't notice that photo. Anyway, the good news - it works! :) I had to swap the blue and green wires coming out of this converter then it tested ok and I could begin the process of understanding the software. I have no idea what has changed, but now it saves the settings :)...
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    Sabvoton 72150 and 60 degree phase angle solution

    AH, sorry about the link. Maybe this will work? https://www.aliexpress.com/item/32796266176.html Oh crikey! I had no idea there were so many permutations and pitfalls. I seem to have fallen into most of them so far :(
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    Sabvoton 72150 and 60 degree phase angle solution

    I bought a super cheap hall sensor swap thingie https://www.aliexpress.com/snapshot/0.html?spm=a2g0s.9042647.0.0.20234c4dMmAciE&orderId=8016439396636806&productId=32796266176. Not sure exactly what it does with the hall wires, but it converts 60 to 120 somehow. I hooked up the Sabvoton and it...
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    Sabvoton 72150 and 60 degree phase angle solution

    Oh, really? I thought it was the way the coils were arranged and wired up? Meanwhile, I've just connected the Sabvoton to a large 36v bicycle hub motor and put 72V through it :twisted: Got it all wired up and tested through the bluetooth in about 30 mins. So at least I know it's not me! and...
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    Sabvoton 72150 and 60 degree phase angle solution

    So I've been mis-sold a Sabvoton 72150 as I have a 60 degree motor and the controller is for 120 degree. I'm gutted because I've pinned all my hopes on this amazing controller and I want to keep it! I wanted to replace the controller on my Evomotion 3000 moped with this one, I'm tempted to...
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    Sabvoton 72150 phase testing, no combination works

    Yeah, the halls seem to work fine. Before I got round to unplugging them and adding a resistor, I tested them still plugged in to the old controller, they jump up to 5v just fine now. Presumably I can use this signal to measure the hall angle and input that into the test, next time? Not sure if...
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    Sabvoton 72150 phase testing, no combination works

    Thanks TommyCat, I'll give this a go...
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    Sabvoton 72150 phase testing, no combination works

    I haven't tried 15. I'll try that next time. Thanks.
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    Sabvoton 72150 phase testing, no combination works

    Thanks guys. I can't find the purchase correspondence (dead mac) but phase angle is the first thing I would have checked and asked about. I swapped several emails with China before I bought it. Do they make different versions? I can't find anywhere in the software to input phase angle, so maybe...
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    Sabvoton 72150 phase testing, no combination works

    I put the old controller back and everything works fine. I want to buy some new halls anyway. I’ve read it can help to get good quality halls? Smoother running etc. Do I need to dig the old ones out, rendering my transport useless for a while? Or can i make an educated guess about the required...
  25. D

    Sabvoton 72150 phase testing, no combination works

    I put the old controller back and everything works fine. I want to buy some new halls anyway. I’ve read it can help to get good quality halls. Smoother running etc. Do i need to dig the old ones out, rendering my transport useless for a while? Or can i makd sn educated guess? I assume I need a...
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