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Sync loss when switching from HALL to sensorless

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blezalex
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Joined: 2017-09-15 07:09
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Sync loss when switching from HALL to sensorless

VESC 6, controlling 1000w 8in hub motor with 18 in tire. No load added. ~50v power suppply.

 

Motor runs OK in hall mode (i set sensorless ermp to 8000, 6000erpm is the max RPM this motor can reach)

If i set sensorless model to 2500 or 1500 ermp, motor knocks really bad when reaches that speed and fails to accelerate. I tried doubling and halving observer gain, motor runs somewhat OK when observer gain is reduced 10x from what its detected value is 0.6 to 0.04

I would appreciate the ideas to solving this tracking problem

 

blezalex
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Last seen: 4 months 4 weeks ago
VESC Free
Joined: 2017-09-15 07:09
Posts: 2

Running the detection at much higher current produced different resistance and inductance values, which solved the problem.

It would be very helpful to have a troubleshooting guide, describing how to get a motor running properly and most common problems. Does anything like that exist already?