Hi Yunzhong,
In Simulink, the Controlled Voltage Source block is designed to model a voltage source that can be controlled based on the input signal. The discrepancy you are observing between the expected behavior and the actual behavior can be explained by understanding the different input types and configurations available in the block.
Input Types
1. Instantaneous (Default):
In this mode, the output voltages [va, vb, vc] are expected to be equal to the values of the input port S instantaneously. This means that the output should mirror the input signal without any amplitude or phase alterations.
2. Sinusoidal Magnitude and Phase Shift:
When the input type is set to sinusoidal magnitude and phase shift, the output behavior changes. The output voltages will be a sinusoidal waveform with an amplitude that is root three times the original value and a phase shift relative to the input signal.
For more information, please refer to
https://www.mathworks.com/help/sps/ref/controlledvoltagesourcethreephase.html#
Resolution:
To address the discrepancy and align the behavior with the expected output matching the input signal, you need to ensure that the input type is set to "Instantaneous." By selecting this option, the output voltages should precisely replicate the input signal without any amplitude scaling or phase shifts.Here is an example of how you can set the input type in Simulink:
% Simulink Model Configuration
model = 'YourModelName';
open_system(model);
% Accessing Controlled Voltage Source Block Parameters
block = [model, '/Controlled Voltage Source'];
open_system(block);
% Setting Input Type to Instantaneous
set_param(block, 'InputType', 'Instantaneous');
By configuring the Controlled Voltage Source block with the correct input type, you can ensure that the output voltages match the input signal as expected, providing consistency in your simulation results.
