Journal ArticleDOI
On the zero-crossing distortion in single-phase PFC converters
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TLDR
In this article, a simple linear model is presented which reveals two previously unknown causes for zero-crossing distortion, namely, the leading phase of the input current and the lack of critical damping in the current loop.Abstract:
Input current distortion in the vicinity of input voltage zero crossings of boost single-phase power factor corrected (PFC) ac-dc converters is studied in this paper. Previously known causes for the zero-crossing distortion are reviewed and are shown to be inadequate in explaining the observed input current distortion, especially under high ac line frequencies. A simple linear model is then presented which reveals two previously unknown causes for zero-crossing distortion, namely, the leading phase of the input current and the lack of critical damping in the current loop. Theoretical and practical limitations in reducing the phase lead and increasing the damping factor are discussed. A simple phase compensation technique to reduce the zero-crossing distortion is also presented. Numerical simulation and experimental results are presented to validate the theory.read more
Citations
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Journal ArticleDOI
Review of harmonic analysis, modeling and mitigation techniques
TL;DR: In this paper, the authors used harmonic analyzers to measure the harmonics in real systems to evaluate suitable mitigation alternatives for the distortionive power losses in power distribution system by using data acquisition hardware and inbuilt software algorithms to perform onsite measurements.
Journal ArticleDOI
Duty-ratio feedforward for digitally controlled boost PFC converters
TL;DR: A comparison reveals the advantages of the proposed current-control scheme: a low total-harmonic-distortion of the input current, a resistive input impedance, virtually no zero-crossing distortion and a fundamental displacement power factor close to unity.
Proceedings ArticleDOI
An algorithm and implementation system for measuring impedance in the D-Q domain
TL;DR: In this paper, the authors present a method to measure three phase impedances in the D-Q rotating reference frame for three phase AC systems and demonstrate the successful implementation and operation of such a system.
Journal ArticleDOI
Feedforward current control of boost single-phase PFC converters
TL;DR: In this paper, the authors presented the theory and application of feedforward current control for boost single-phase ac-dc converters with power factor correction. But the proposed control method is compared to existing feedback and feedforward control methods and is shown to significantly reduce input current harmonic distortion, particularly for applications where the current loop crossover frequency is relatively low compared to the line frequency.
Journal ArticleDOI
On waveform distortion in the frequency range of 2 kHz–150 kHz—Review and research challenges
Sarah K. Ronnberg,Math Bollen,Hortensia Amaris,Gary W. Chang,Irene Yu-Hua Gu,Łukasz Hubert Kocewiak,Jan Meyer,Magnus Olofsson,Paulo F. Ribeiro,Jan Desmet +9 more
TL;DR: An overview of the state-of-the-art concerning these so-called supraharmonics, and noticeably indicates the research challenges associated with waveform distortion in this frequency range.
References
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Book
Modern Control Systems
Richard C. Dorf,Naresh K. Sinha +1 more
TL;DR: This book presents a control engineering methodology that, while based on mathematical fundamentals, stresses physical system modeling and practical control system designs with realistic system specifications.
Journal ArticleDOI
Averaged modeling of PWM converters operating in discontinuous conduction mode
TL;DR: In this article, a duty ratio constraint that defines the diode conduction interval is identified to be the key to accurate prediction of high-frequency behavior of hard-switching pulse-width modulated (PWM) converters.
Journal ArticleDOI
Techniques for minimizing the input current distortion of current-controlled single-phase boost rectifiers
TL;DR: In this article, a two-switch asymmetrical half-bridge rectifier is presented that draws an input current at a unity fundamental power factor and with the same low distortion as obtained with the four-switch H-bridges rectifier.
Journal ArticleDOI
A unity power factor converter using half-bridge boost topology
TL;DR: In this article, a single-phase high-efficiency near-unity power-factor (PF) half-bridge boost converter circuit is presented with detailed analysis and design considerations for the power circuit using the fixed-band hysteresis current control (HCC) technique.
Proceedings ArticleDOI
Modeling and practical design issues for average current control
TL;DR: In this article, a straight-forward averaged modeling method is proposed, and the resulting models are shown to be accurate enough for practical design purpose for PWM converters with average current control.