Active Damping Injection Output Voltage Control with Dynamic Current Cut-Off Frequency for DC/DC Buck Converters

Sun Lim, Seok-Kyoon Kim and Yonghun Kim
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Sun Lim: Intelligent Robotics Research Center, Korea Electronics Technology Institute, Bucheon 401401, Korea
Seok-Kyoon Kim: Department of Creative Convergence Engineering, Hanbat National University, Daejeon 34158, Korea
Yonghun Kim: School of Mechanical Engineering, Chungnam National University, Daejeon 136701, Korea

Energies, 2021, vol. 14, issue 20, 1-17

Abstract: With regard to DC/DC buck converter applications, the objective of this study is to expand the admissible range of the output voltage cut-off frequency while lowering the steady-state current cut-off frequency as possible. This study fortifies the inner loop by incorporating the novel subsystems such as an auto-tuner (for the dynamic current cut-off frequency) and active damping injection invoking the pole-zero cancellation nature with the particular designed feedback gain structure. The outer loop active damping control renders the closed-loop speed transfer function to be a first-order low-pass filter with the cooperation of the specially structured design parameters; in addition, it provides time-varying disturbance attenuation. The experimental results obtained for a 3-kW buck converter validate the feasibility of the proposed technique by showing a 34 % performance enhancement (at least) compared with the recent active damping controller.

Keywords: DC/DC converter; dynamic current cut-off frequency; auto-tuner; active damping (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2021
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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