Output voltage tracking controller embedding auto-tuning algorithm for DC/DC boost converters

• Published in: IET power electronics Vol. 12; no. 14; pp. 3767 - 3773
• Main Authors: Choi, Kyunghwan, Kim, Yonghun, Kim, Kyung-Soo, Kim, Seok-Kyoon
• Format: Journal Article
• Language: English
• Published: The Institution of Engineering and Technology 27.11.2019
• Subjects: auto‐tuner design; cascade control; classical cascade control structure; closed loop systems; closed‐loop system; control gain; control system synthesis; controller embedding auto‐tuning algorithm; converter dynamics; DC‐DC boost converters; DC‐DC power convertors; load variations; nonlinear control systems; nonlinear output voltage tracking controller; output voltage error; output voltage tracking controller embedding auto‐tuning algorithm; parameter uncertainties; performance recovery; power 5.0 kW; Research Article; transient performance enhancement; uncertain systems; voltage control; classical cascade control structure; uncertain systems; performance recovery; control gain; load variations; DC-DC boost converters; control system synthesis; converter dynamics; transient performance enhancement; DC-DC power convertors; output voltage tracking controller embedding auto-tuning algorithm; closed loop systems; auto-tuner design; power 5.0 kW; cascade control; nonlinear control systems; output voltage error; parameter uncertainties; controller embedding auto-tuning algorithm; nonlinear output voltage tracking controller; closed-loop system; voltage control
• ISSN: 1755-4535; 1755-4543; 1755-4543
• DOI: 10.1049/iet-pel.2018.6021

This study suggests a non-linear output voltage tracking controller for DC/DC boost converters in the form of a classical cascade control structure. Non-linearities in the converter dynamics as well as parameter uncertainties and load variations are considered. The first contribution of this study is the design of an auto-tuner, which automatically adjusts the control gain according to the output voltage error to enhance transient performance. The second contribution involves proving that the closed-loop system ensures the performance recovery without any steady-state errors in the presence of parameter and load variations. The effectiveness of the proposed algorithm was verified through experimental investigations using a 5 kW prototype DC/DC boost converter.