PMSM (simscape) No load test

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s0ter48 on 29 Jan 2021
Answered: Joel Van Sickel on 17 Aug 2021
Hey guys,
I am trying to resolve my no load data out of my in simscape designed PMSM.
With load it is no problem and the motor is working properly. I am using a ideal torque source for my load simulation.
But when I type in 0 the motor is not working properly.
So how can I do a no load test with the PMSM.
A open circuit is not the right thing at this place because it uses high (inf) resistances and I am not able to get my no load current.
Maybe one of u tried this before... I hope so.
Best regards and thanks in advance.
Federico Manfrin
Federico Manfrin on 15 Apr 2021
I think you're using the PMSM as voltage/current generator, right?

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Answers (1)

Joel Van Sickel
Joel Van Sickel on 17 Aug 2021
If you are using specialized power systems, it can be very hard to model a no-load test without very small time steps. It might make more sense to use the simscape components (blue components) to model this. You can also use a large snubber resistor to get "almost" no load current. Esentially, the smaller your time step, or the lower your resistance, the easier it will be to get a value.

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