How to correct 180-degree phase shift caused by negative feedback loop
I’m in the process of designing a cascaded PI controller by following a tutorial published by MathWork in 2022. By comparing the close-loop response and the open-loop response of the inner loop, i’m noticing a 180-degree phase shift. The tutorial states before working on the outer loop, this phase shift must be corrected. Can someone please explain how i can do that ? Thanks in advance.
Link to the tutorial:Cascade Digital PID Control Design for Power Electronic Converters – MATLAB & Simulink (mathworks.com)I’m in the process of designing a cascaded PI controller by following a tutorial published by MathWork in 2022. By comparing the close-loop response and the open-loop response of the inner loop, i’m noticing a 180-degree phase shift. The tutorial states before working on the outer loop, this phase shift must be corrected. Can someone please explain how i can do that ? Thanks in advance.
Link to the tutorial:Cascade Digital PID Control Design for Power Electronic Converters – MATLAB & Simulink (mathworks.com) I’m in the process of designing a cascaded PI controller by following a tutorial published by MathWork in 2022. By comparing the close-loop response and the open-loop response of the inner loop, i’m noticing a 180-degree phase shift. The tutorial states before working on the outer loop, this phase shift must be corrected. Can someone please explain how i can do that ? Thanks in advance.
Link to the tutorial:Cascade Digital PID Control Design for Power Electronic Converters – MATLAB & Simulink (mathworks.com) control, power_electronics_control MATLAB Answers — New Questions