公开(公告)号：US12166432B2

公开(公告)日：2024-12-10

申请号：US18010648

申请日：2021-06-30

Applicant: Khalifa University of Science and Technology

Inventor： Igor Boiko ,  Ahmed Shehada ,  Balanthi Mogru Abdul Rahiman Beig ,  Yan Yan

IPC: H02M7/5387 ,  G05B11/42 ,  H02M1/00 ,  H02M1/12

Abstract: A system including a proportional-integral-derivative (PID) controller, a modified relay feedback test (MRFT) block, a memory block, a biasing block, a dq0-to-abc transformation block, a switch configured to selectively couple output signal of the biasing block or the PID controller output signal to the input of the dq0-to-abc transformation block, a three phase digital pulse width modulator, electronic switches, a voltage sensor configured to measure the output of each voltage of the three phases on the load and produce voltage data signals (Voa, Vob, Voc), and an abc-to-dq0 transformation block having an input being a representative of the phase voltages on the load, and producing an output being a representative of these voltages in the dq0 format.

公开(公告)号：US12259713B2

公开(公告)日：2025-03-25

申请号：US18010087

申请日：2021-06-29

Applicant: Khalifa University of Science and Technology

Inventor： Igor Boiko ,  Ahmed Shehada ,  Balanthi Mogru Abdul Rahiman Beig ,  Yan Yan

IPC: G05B19/4155

Abstract: A method of automatically tuning a proportional-integral-derivative (PID) controller (102) controlling a DC-DC converter (100) includes substituting the PID controller (102) with a modified relay feedback test (MRFT) (104) controller having a threshold parameter (β) and a magnitude parameter (h), iteratively determining a current error signal (e[k]) by measuring an output voltage (Vo[k]) of the DC-DC converter (100) and comparing it to a desired reference output voltage (Vo-ref), input the error signal (e[k]) to the MRFT (104), determining an output value (u[k]) of the MRFT, update the duty cycle (D) based on the output value (u[k]), operating the DC-DC converter (100) using the updated duty cycle (D), exciting oscillations in the loop containing the MRFT (104) and the DC-DC converter (100), measuring a frequency (Ω0) and amplitude (α0) of the output voltage (Vo[k]), updating PID controller parameters based on the frequency (Ω0) and amplitude (α0), and substituting the MRFT (104) with the PID controller (102).