How to calculation of PMSM Back EMF

Question

Dear All,

 

I have a question about back EMF of PMSM.

In the Plecs, how to calculate back EMF of PMSM?

I have back emf constant which measure by line to line peak voltage.

Best regards,

Answer 1

The conversion approach is noted at the very bottom of the PMSM component documentation, where K_E is the peak-phase voltage, φ_M is the flux induced by the magnet, and p is the number of pole pairs. 

K_E = φ_M·p

Note that if your BEMF constant is line-to-line, opposed to the phase voltage, then you will have to add another scaling factor of sqrt(3) for sinusoidal BEMF.