- Then add a capacitor to smooth the DC voltage.
- Use a PWM inverter to convert DC back to AC with controllable frequency and voltage.
- Create a function block to control the inverter frequency and voltage.
- Configure an induction motor block with parameters like rated power, voltage, and frequency.
- Add a constant block to simulate load torque.
Designing an Induction motor from AC-DC-AC, I am not sure what code to enter for the function block. I want to check the speed and torque response with the change of frequency
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Designing an AC-DC-AC induction motor so far I have:
AC source - rectifier - Inverter with the function block - Induction motor and - constant block (load). I want to check the speed and torque responce with the change of frequency.
I am not sure what code do I need to enter in the function block so that I can check the speed and toque responce with the change of frequency.
Can anyone assist please?
Regards
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Manikanta Aditya
2024-7-1
Hi,
As part of process design the AC design source and then use a diode bridge rectifier block to convert AC to DC.
Here is an example workaround MATLAB code snippet for the function block that controls the frequency and voltage of the inverter:
function [Vout, Fout] = inverter_control(speed_ref, speed_actual)
% Parameters
Vbase = 230; % Base voltage in volts
Fbase = 50; % Base frequency in Hz
% Proportional controller for speed regulation
Kp = 1.0;
% Calculate the frequency error
freq_error = speed_ref - speed_actual;
% Adjust the output frequency based on the speed error
Fout = Fbase + Kp * freq_error;
% Limit the frequency within safe operating range
Fout = max(0, min(Fout, 2*Fbase));
% Adjust the output voltage proportionally to the frequency
Vout = Vbase * (Fout / Fbase);
end
I hope this helps!
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