Journal ArticleDOI
A Review of Spread-Spectrum-Based PWM Techniques—A Novel Fast Digital Implementation
TLDR
An insight is provided into the SS techniques: its history, its types, and mainly its ability to mitigate the EMI problem in the SMPS domain and a new fast digital implementation method based on a dsPIC33F microcontroller is presented.Abstract:
Spread-spectrum (SS)-based pulsewidth modulation (PWM) techniques play an important role when tackling the electromagnetic interference (EMI) problem in the switch-mode power supply (SMPS) domain. They achieve the best EMI noise reduction and emerge as a promising and very effective solution to comply with electromagnetic standards. The current work provides an insight into the SS techniques: its history, its types, and mainly its ability to mitigate the EMI problem in the SMPS domain. Moreover, it gives a short review of the different SS-based PWM techniques going from the most basic and simple, i.e., the periodic modulation, to the most developed and complex, i.e., the random and chaotic modulations. Besides, a short review of the different implementation methods was addressed and they were categorized into analog and digital implementation techniques where its pros and cons were provided. Finally, a new fast digital implementation method based on a dsPIC33F microcontroller is presented. Its effectiveness was proved and its advantages over the reviewed implementation techniques were recognized. It reached a 20 dBuV EMI level reduction when the digital chaotic and periodic profiles were embedded into a boost converter prototype.read more
Citations
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Journal ArticleDOI
Modeling of Conducted Emissions for EMI Analysis of Power Converters: State-of-the-Art Review
TL;DR: A comprehensive review and comparison of different modeling approaches for conducted emissions are provided, which can be used as a design guideline for engineers to assist them with a more efficient and electromagnetically-compatible design.
Proceedings ArticleDOI
Advances in Modeling and Reduction of Conducted and Radiated EMI in Non-isolated Power Converters
TL;DR: In this paper, the authors present a survey of recent advances in radiated EMI research for non-isolated power converters and discuss future EMI development for NCCs.
Journal ArticleDOI
Characterization and Selection of Probability Statistical Parameters in Random Slope PWM Based on Uniform Distribution
Xu Jie,Ziling Nie,Junjie Zhu +2 more
TL;DR: The uniformly distributed random carrier sequence probabilistic parameters with harmonic distributed in the frequency domain, offers an approach to selecting arandom carrier sequence obeying uniform distribution.
Journal ArticleDOI
Resonance Suppression and EMI Reduction of GaN-Based Motor Drive With Sine Wave Filter
TL;DR: In this article, an undamped method with variable delay time is proposed to solve the electrical resonance issue caused by the LC filter and stator inductor, which is suitable for resonance suppression at a variable switching frequency.
Journal ArticleDOI
FPGA-Based System for Electromagnetic Interference Evaluation in Random Modulated DC/DC Converters
Hermes José Loschi,Piotr Lezynski,Robert Smolenski,Douglas Aguiar do Nascimento,Wojciech Sleszynski +4 more
TL;DR: The theoretical algorithms, hardware details and experimental results are presented and discussed in terms of conducted electromagnetic interference emission and Probability density functions are used to analyse and improve pseudo-random algorithms.
References
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Digital communications
TL;DR: This month's guest columnist, Steve Bible, N7HPR, is completing a master’s degree in computer science at the Naval Postgraduate School in Monterey, California, and his research area closely follows his interest in amateur radio.
Journal ArticleDOI
Theory of Spread-Spectrum Communications--A Tutorial
TL;DR: It is the intention of this paper to provide a tutorial treatment of the theory of spread-spectrum communications, including a discussion on the applications referred to, on the properties of common spreading sequences, and on techniques that can be used for acquisition and tracking.
Journal ArticleDOI
Quantization resolution and limit cycling in digitally controlled PWM converters
TL;DR: In this paper, the presence of steady-state limit cycles in digitally controlled PWM converters is discussed, and conditions on the control law and quantization resolution for their elimination are suggested.
Journal ArticleDOI
A Review of Multilevel Selective Harmonic Elimination PWM: Formulations, Solving Algorithms, Implementation and Applications
TL;DR: A comprehensive review of the multilevel selective harmonic elimination pulse width modulation (SHE-PWM) is presented in this paper, focusing on various aspects of multi-level multi-mode PWM modulation, including different problem formulations, solving algorithms, and implementation in various multi-layer converter topologies.
Journal ArticleDOI
Small-Signal Discrete-Time Modeling of Digitally Controlled PWM Converters
Dragan Maksimovic,Regan Zane +1 more
TL;DR: In this article, an exact small-signal discrete-time model for dc-dc converters operating in constant frequency continuous conduction mode (CCM) with a single effective A/D sampling instant per switching period is presented.
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