Blown CIM?

[Ether]

Originally Posted by evand4567

Quick question: is it possible to blow a cim motor

Yes, and this is how:

We have a couple cims that were stalled a number of times for a non-trivial amount of time.

how would you test it to see if its performance has degraded?

Measure the free current. This is easy to do. All you need is a $4 Harbor Freight digital meter.

Measure the free speed. You could do this with a calibrated strobe light or a special point-and-shoot rpm measuring tool. Or an encoder or tachometer.

Measure the stall current. You could use that $4 Harbor Freight meter to measure the voltage drop across a length of wire of known resistance. Or use the PDB current monitor.

Measure the stall torque. Put a torque wrench on the CIM shaft?