I am modellign some examples using the modelling language Modelica. Unfortunately, I am not an electrical engineer, so it is hard to understand the physical behavior of the following example (DC motor):
Where emf "transforms electrical energy into rotational mechanical energy". The model "emf" looks like this:
The input voltage is plotted in the following graphic (top). I dont understand the following things:
- Why is the current zero in steady state?
- My interpretation: In steady state, the voltage input is equal to the voltage drop at the emf. The angular velocity is proportional to the voltage drop at emf.
- What is the "emf model" in a real DC-motor?
Thank you very much for your help