NDLI: Study on high robustness and fast dynamic response synchronous rectifier buck converter

Content Provider	IET Digital Library
Author	Gu, Yu Zhang, Donglai Zhang, Xiaofeng
Abstract	Here, a novel control strategy combined by constant-frequency V 2 control and H ∞ robust control is proposed and tested in a buck converter. The control strategy not only demonstrates the fast transient response of ordinary V 2 control, but also shows strong robustness with different input conditions. The main drawbacks of V 2 control, such as high interference susceptibility and low input perturbation stability margin, can be improved by introducing H ∞ robust strategy into the controller design. During the analysis and design process, the original controlled system based on the V 2 control is modelled at first, then the H ∞ weighting functions are calculated according to the small-signal analysis of V 2 controlled buck converter. After that, the H ∞ robust compensator parameters based on constant-frequency V 2 control are calculated. Finally, a buck converter controlled by the proposed control strategy is built and tested, with 48 V input voltage, 12 V output voltage, and 120 W output power. The experimental results demonstrate the effectiveness of the converter with the proposed control, which also proves the proposed method has great potential for high robustness and fast dynamic response applications.
Starting Page	1365
Ending Page	1372
Page Count	8
ISSN	17554535
Volume Number	11
e-ISSN	17554543
Issue Number	Issue 8, Jul (2018)
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/iet-pel/11/8
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/10.1049/iet-pel.2017.0414
Journal	IET Power Electronics
Publisher Date	2018-01-22
Access Restriction	Open
Rights Holder	© The Institution of Engineering and Technology
Subject Keyword	Compensation Constant-frequency V2 Control Control of Electric Power System Control Strategy Control System Analysis Control System Synthesis Controller Design Fast Transient Response Frequency Control High Robustness Fast Dynamic Response Synchronous Rectifier Buck Converter H∞ Control H∞ Robust Compensator Parameters H∞ Robust Control H∞ Weighting Functions Optimal Control Power 120 W Power Converter Power Electronics Power Supply Rectifying Circuit Robust Control Small-signal Analysis Stability in Control Theory Supervisory Circuit Synthesis Method Transient Response V2 Controlled Buck Converter Voltage 12 V Voltage 48 V
Content Type	Text
Resource Type	Article
Subject	Electrical and Electronic Engineering

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