Hi Francesco
I have used translator and translated your question to English, and I will reply to your query in English.
As per my understanding, you were asked to update the model of an electric motor. You have the ‘Kv’, ‘Kt’, ‘Kv’ (RPM drop per amp), no-load current, and no-load current. You are unable to find the models that only use the above parameters, you observed that resistance and inductances have also been considered, so you want to know the reason.
- ‘Kv’ is the motor velocity constant, measured in revolutions per minute (RPM) per volt.
- 'Kt' is the motor torque constant.
- ‘Kn’ seems to be a parameter specific to your model representing RPM drop per amp.
However, it’s important to note that these constants alone might not be sufficient to fully describe the behavior of an electric motor. This is because electric motors also have inherent properties like resistance and inductance which play a crucial role in their operation.
For a more comprehensive model, you might need to consider these additional parameters:
- Resistance: The resistance of the motor windings, which can cause energy losses.
- Inductance (L): The inductance of the motor windings, which can affect the motor’s response to changes in voltage.
If you’re looking for a simpler model that only uses Kv, Kt, and Kn, you might have to make some assumptions or simplifications about the motor’s behavior. For example, you could potentially ignore the effects of inductance if the motor is operating at steady state, or assume a constant resistance if the motor’s temperature doesn’t change significantly.
Please refer to the following references to know more about
- Motor Constants: https://en.wikipedia.org/wiki/Motor_constants
- First Order DC Electric Motor Model: https://web.mit.edu/drela/Public/web/qprop/motor1_theory.pdf
I hope this resolves the issue you were facing.
