Title

Adaptive Digital Controller And Design Considerations For A Variable Switching Frequency Voltage Regulator

Keywords

Adaptive control; Dc-dc converter; Digital control; Dynamic response; Efficiency; Limit cycle; Variable frequency

Abstract

An auto-tuning adaptive digital controller with maximum efficiency point tracking to optimize dc-dc converter switching frequency is presented in this paper. The adaptivefrequency-optimization (AFO) controller adjusts the dc-dc converter switching frequency while tracking the converter minimum input power (maximum efficiency) point under variable operation conditions of the power converter. The AFO digital controller continuously finds the optimum switching frequency that will result in minimum total power loss while converter parameters and conditions vary. Moreover, the presented controller addresses the issues that are associated with implementing variable switching frequency in digital controllers, including limit cycle oscillation and possible performance degradation, by using a dynamic algorithm tomaintain converter system stability under variable switching frequency operation. In this paper, the proposed controller is discussed, analyzed, and its digital control algorithms and experimental results are presented. © 2009 IEEE.

Publication Date

12-1-2009

Publication Title

IEEE Transactions on Power Electronics

Volume

24

Issue

11

Number of Pages

2589-2602

Document Type

Article

Personal Identifier

scopus

DOI Link

https://doi.org/10.1109/TPEL.2009.2031439

Socpus ID

77957741547 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/77957741547

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