Patient history: older Sabvoton 72150, Crystalite MKII, 92V, Cycle analyst (10 KW system). It's always had a hall issue where it'd fault if you accelerated hard for more than a few seconds, or if you dumped the throttle off too fast instead of ramping it down gradually. Then few years later, if you go over 60km/hr the power would flutter off and on then fault. All issues i learnt to live with.
Recent Events & Symptoms: 1st January - it'd just fault as soon as you apply any throttle. I replaced all 3 halls (using ss441A unipolar sensors, I read plenty of discussions on this so hoping I got that right!), reassembled, then motor just buzzes/humms, won't turn! Halls all return a signal in sequence as wheel rotates, 3.08v, 3.08v, 4.85v, again I read lots of posts on this and appears to be "normal" on sabvotons). Tested motor - same resistance, nothing down to earth, cogging the same when shorting out 2 phases. Perhaps I mixed up sensor signal wires or sensor / positions, so started swapping yellow/green/blue...first combo I tried the wheel went backwards! Interesting. I tried another combo that went backwards again, then the final combo it went forwards...great...I reassembled...BUT then under any load it moves you forward but shudders badly, then eventually gives a hall sensor fault if you apply more throttle.
Diagnosis: no idea!!! I'm sure there are some good suggestions amongst the group
Treatment: Do I try a different type of halls? Considering buying a new sabvoton 72150. my current one is missing the programming cable (tried making a new one from a usb rs232 and a rs485 chip but couldn't get it to communicate).
The patients family is quite emotional and hoping there's a specialist witch doctor out there who can give us some hope.
Recent Events & Symptoms: 1st January - it'd just fault as soon as you apply any throttle. I replaced all 3 halls (using ss441A unipolar sensors, I read plenty of discussions on this so hoping I got that right!), reassembled, then motor just buzzes/humms, won't turn! Halls all return a signal in sequence as wheel rotates, 3.08v, 3.08v, 4.85v, again I read lots of posts on this and appears to be "normal" on sabvotons). Tested motor - same resistance, nothing down to earth, cogging the same when shorting out 2 phases. Perhaps I mixed up sensor signal wires or sensor / positions, so started swapping yellow/green/blue...first combo I tried the wheel went backwards! Interesting. I tried another combo that went backwards again, then the final combo it went forwards...great...I reassembled...BUT then under any load it moves you forward but shudders badly, then eventually gives a hall sensor fault if you apply more throttle.
Diagnosis: no idea!!! I'm sure there are some good suggestions amongst the group
Treatment: Do I try a different type of halls? Considering buying a new sabvoton 72150. my current one is missing the programming cable (tried making a new one from a usb rs232 and a rs485 chip but couldn't get it to communicate).
The patients family is quite emotional and hoping there's a specialist witch doctor out there who can give us some hope.