Adaptive Order-Reduction Output-Feedback System for DC-DC Power Converters Using Feedback-Loop Intelligentification

TY - JOUR

T1 - Adaptive Order-Reduction Output-Feedback System for DC-DC Power Converters Using Feedback-Loop Intelligentification

AU - Kim, Seok-Kyoon

AU - Lim, Sun

AU - Lam, Hak-Keung

AU - Ahn, Choon Ki

N1 - Publisher Copyright: © 1982-2012 IEEE.

PY - 2025/6/6

Y1 - 2025/6/6

N2 - The suggested multiloop output-feedback system for dc/dc power converters deals with changes in parameters and loads, as well as performance issues, by using advanced methods like constrained feedback-loop intelligentification and pole-zero cancelation (PZC)-based order reduction (OR). This study offers several key contributions: 1) a cascade-type model-free observer minimizes steady-state ripple in the output filtering error, thereby broadening the feasible operating region; 2) the resulting observer facilitates an OR adaptive inner loop system capable of exponentially stabilizing the output voltage derivative error; and 3) a nonlinear update rule introduces intelligence into the outer loop by ensuring a critically damped transfer function, which automatically adjusts feedback gain according to the operating conditions. A prototype 3-kW bi-directional power converter demonstrates the practical advantages of the proposed technique by the experimental comparison study.

AB - The suggested multiloop output-feedback system for dc/dc power converters deals with changes in parameters and loads, as well as performance issues, by using advanced methods like constrained feedback-loop intelligentification and pole-zero cancelation (PZC)-based order reduction (OR). This study offers several key contributions: 1) a cascade-type model-free observer minimizes steady-state ripple in the output filtering error, thereby broadening the feasible operating region; 2) the resulting observer facilitates an OR adaptive inner loop system capable of exponentially stabilizing the output voltage derivative error; and 3) a nonlinear update rule introduces intelligence into the outer loop by ensuring a critically damped transfer function, which automatically adjusts feedback gain according to the operating conditions. A prototype 3-kW bi-directional power converter demonstrates the practical advantages of the proposed technique by the experimental comparison study.

UR - https://www.scopus.com/pages/publications/105010680102

U2 - 10.1109/TIE.2025.3579088

DO - 10.1109/TIE.2025.3579088

M3 - Article

SN - 0278-0046

VL - 72

SP - 12457

EP - 12468

JO - IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS

JF - IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS

IS - 12

ER -