Large-Signal Stability Guarantees for Cycle-by-Cycle Controlled DC-DC Converters

Xiaofan Cui; Al-Thaddeus Avestruz

Large-Signal Stability Guarantees for Cycle-by-Cycle Controlled DC-DC Converters

Systems and Control 2022-10-18 v4 Systems and Control Dynamical Systems

Authors: Xiaofan Cui , Al-Thaddeus Avestruz

Abstract

Stability guarantees are critical for cycle-by-cycle controlled dc-dc converters in consumer electronics and energy storage systems. Traditional stability analysis on cycle-by-cycle dc-dc converters is incomplete because the inductor current ramps are considered fixed; but instead, inductor ramps are not fixed because they are dependent on the output voltage in large-signal transients. We demonstrate a new large-signal stability theory that treats cycle-by-cycle controlled dc-dc converters as a particular type of feedback interconnection system. An analytical and practical stability criterion is provided based on this system. The criterion indicates that the L/R and RC time constants are the design parameters that determine the amount of coupling between the current ramp and the output voltage.

Keywords

power electronics and control stability analysis and control control systems

Cite

@article{arxiv.2205.10155,
  title  = {Large-Signal Stability Guarantees for Cycle-by-Cycle Controlled DC-DC Converters},
  author = {Xiaofan Cui and Al-Thaddeus Avestruz},
  journal= {arXiv preprint arXiv:2205.10155},
  year   = {2022}
}

Comments

typos corrected, references added, title, abstract, and introduction revised, results unchanged

Large-Signal Stability Guarantees for Cycle-by-Cycle Controlled DC-DC Converters

Abstract

Keywords

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