The stalled motor is a non-linear load, so an RL circuit might not be
representative. For overload testing, we used a band-brake, but I
suppose a disc brake would be used now. You would need to plot the
torque versus hydraulic pressure curve to calibrate it.
On 2024-08-14 17:36, James Pawson (U3C) wrote:
Hi all,
We’ve had a few things in the lab recently requiring motor locked
rotor and motor overload testing.
Working on the principle that a locked rotor motor looks like a short
circuit (inductance and DC resistance of winding) would it be
reasonable to just substitute the motor with the equivalent circuit?
For an overload testing (steadily increasing the load on the motor
drive until failure or trip) I’m not sure how best to practically do
this. How do people achieve these tests practically in the lab? What
equipment is used?
Any recommendations gratefully received.
All the best
James
James Pawson
Managing Director & EMC Problem Solver
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