Is the Synchronous Machine SI Fundamental Load angle in mechanical or eletric degrees?

I'm using the Synchronous Machine SI Fundamental model on simulink to try and simulate a motor and replicate the real live values I obtained from load tests. Although the data seems to match, the load angle is smaller, about half the value it is supposed to be, so I wanted to know if the load angle I'm obtaining is mechanical or eletrical to see if I have to work on the values a little more and find better results.

Answer 1

[Sumukh]

Hi @Catarina Moreira,

The “Load angle delta” measurement signal of the “Synchronous Machine SI Fundamental” block is indeed an electrical angle in degrees and not mechanical. This can be validated by looking under the mask of the block: “Synchronous Machine SI Fundamental/Measurements”. Kindly refer to the following documentation to know more about looking under masked subsystems:

https://www.mathworks.com/help/releases/R2023b/simulink/ug/operate-on-existing-masks.html#bu479xk-4

The “Measurements” subsystem inside the block has two inports: “m_e” and “m_m”, that denote the electrical and mechanical measurements taken from the electrical and mechanical model subsystems. The load angle comes from the electrical measurement inport.

I hope this answers your query.