> > > > Well, the first thing to do is put the motor shaft in your > machine spindle and turn it at a known RPM. > (Make sure to have the motor case secured in a vise or > whatever, to prevent it spinning on you.) > Then, measure the voltage at the motor terminals. That will > give you the KV constant, Volts/thousand RPM. If the > voltage is pretty low at 700 - 1000 RPM, then most likely > the rating is not a real MAXIMUM. > I can't imagine why the motor would fly apart at only 700 > RPM. But, maybe it has a high KV, and they don't want to > run excessive voltage on the commutator. > > Jon > > It's a 3-phase PM motor, no commutator. So does the KV constant method still apply? Maybe load it with a few hundred ohms to damp it a bit?
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