LikeTheSandwich
Member
I have a car alternator converted into a BLDC motor. It gets jittery at high RPM, around 3500-3800. Is that the controller not able to output correctly to it? Like it's not reading the back-EMF correctly and feeding it the wrong voltage slightly? Is there anything I can do to fix that, or do I just have to stay below that RPM to avoid it? That's a no-load RPM figure, so under load would it behave differently, or maybe just not even reach that high of RPM with a 350lb or higher load?
EDIT: Would field weakening (reducing commutator power) fix that?
EDIT2: I tried lowing the field voltage from 12.6 to 10, no apparent effect. It seems like it might be in the controller. It only seems to jitter for a moment, then it's fine. Almost like it's switching something internally and it's a rough transition.
EDIT: Would field weakening (reducing commutator power) fix that?
EDIT2: I tried lowing the field voltage from 12.6 to 10, no apparent effect. It seems like it might be in the controller. It only seems to jitter for a moment, then it's fine. Almost like it's switching something internally and it's a rough transition.
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