Title

On Load Adaptive Control Of Voltage Regulators For Power Managed Loads: Control Schemes To Improve Converter Efficiency And Performance

Keywords

Adaptive; Control; Converter; Dc-dc; Dynamic response; Efficiency; Light load; Performance; Power management; Ripple; Voltage regulator (VR)

Abstract

Voltage regulator (VR) efficiency improvement especially at light load currents is important in many applications including those that are battery powered and have energy consumption constrains. However, controlled steady-state and dynamic performance should be maintained while improving efficiency. In this paper, an analytical study of VR losses and voltage ripple deviation is presented and discussed, yielding to proposed control technique, namely "pulse sliding" (PSL) control technique, which results in improved VR conversion efficiency with low and controlled voltage ripple and improved dynamic response. The proposed method and controller achieves the advantages of both variable frequency and fixed frequency controls and eliminates their disadvantages by utilizing information obtained from the inductor peak current, compensation error signal and capacitor current, resulting in an optimum nonlinear switching frequency modulation. PSL is compared to other control methods by both analysis and experiments. Experimental results highly agree with theoretical analysis. © 2007 IEEE.

Publication Date

9-1-2007

Publication Title

IEEE Transactions on Power Electronics

Volume

22

Issue

5

Number of Pages

1806-1819

Document Type

Article

Personal Identifier

scopus

DOI Link

https://doi.org/10.1109/TPEL.2007.904232

Socpus ID

34548808073 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/34548808073

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