Hi,
If you observe closely, the rotor speed was "wm" and after multiplication by 4, the speed is labelled as "we". Refer the figure below:
These "wm" and "we" are mechanical speed and electrical speed respectively.
The ratio electrical speed by mechanical speed in a PMSM is equal to the number of pole pairs.
By default, the number of pole pairs is 4 in Simulink PMSM. Refer to the documentation of the PMSM block for more details: Three-phase permanent magnet synchronous machine with sinusoidal or trapezoidal back electromotive force, or five-phase permanent magnet synchronous machine with sinusoidal back electromotive force - Simulink (mathworks.com)
Therefore, the mechanical speed is multiplied by 4 to get the electrical speed. Similar logic has been appiled for the Rotor angle as well.
Hope this helps!
