How to view back EMF in PMSM model with sinusoidal bemf selected

Question

Brian Tremaine 2020-3-9

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https://ww2.mathworks.cn/matlabcentral/answers/509961-how-to-view-back-emf-in-pmsm-model-with-sinusoidal-bemf-selected

回答： Joel Van Sickel 2024-6-4

I'm using the power_BrushlessDCmotor example model to run a PMSM. My application is a sinusoidal bemf. The example is tra[ezoidal and plots out Stator back EMF a_e (V). When I change the PMSM to sinusoidal with round rotor the simulation fails with "Stator back EMF e_a (V)" can not be found in bus selector block. When I double click on the bus selector it does not give that signal in the available signal list.

How can I look at the back EMF when sinusoidal is selected?

Thanks,

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Answer 1

Joel Van Sickel 2024-6-4

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https://ww2.mathworks.cn/matlabcentral/answers/509961-how-to-view-back-emf-in-pmsm-model-with-sinusoidal-bemf-selected#answer_1467511

back emf is not directly available for the sinusoidal. It is an open box model so you can look inside to modify it and use the customize block function in the powergui to bring more signals out. However, it is also your speed times your back emf constant, so you can usually skip that more complicated step and just scale your speed to know it.