Journal Article10.1109/41.836340
A comparative investigation on the use of random modulation schemes for DC/DC converters
TL;DR: A comparative investigation on the use of random modulation schemes for DC/DC power converters is presented, addressing the effectiveness of randomness level on spreading the dominating frequencies that normally exist in constant-frequency PWM schemes, and the low-frequency power spectral density (PSD) of each scheme.
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Abstract: A comparative investigation on the use of random modulation schemes for DC/DC power converters is presented. The modulation schemes under consideration include randomized pulse position modulation, randomized pulsewidth modulation (PWM) and randomized carrier-frequency modulation with fixed and variable duty cycle. The paper emphasizes the suitability and applicability of each scheme in DC/DC power converters. Issues addressed include the effectiveness of randomness level on spreading the dominating frequencies that normally exist in constant-frequency PWM schemes, and the low-frequency power spectral density (PSD) of each scheme. The validity of the analyses is confirmed experimentally by using a DC/DC buck converter operating in the continuous conduction mode. The PSD of the output under each scheme is presented and compared.
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Citations
Sawtooth carrier based Random PWM technique for AC drives
Sivarani T S,Joseph Jawhar S +1 more
- 01 Dec 2015
TL;DR: In this paper, a saw tooth carrier based Random Pulse Width Modulation (RPWM) was proposed for Voltage Source Inverter (VSI) fed Induction Motor (IM) drives.
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Suppression of harmonic spikes in asynchronous sigma delta modulation by randomizing hysteresis window
A. Aurasopon,Pinit Kumhom,Kosin Chamnongthai +2 more
- 23 May 2004
TL;DR: The experimental results show that the proposed technique provides improved performance in terms of low peaks of harmonic while maintaining low output voltage ripple.
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Effectiveness of Dual Chaotic Modulation to EMI Suppression in Power Converter
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TL;DR: Simulation result shows the new modulation scheme is more efficient in dispersing harmonic power than single chaotic schemes, and it is easily realized.
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Effects of Random Switching Schemes on the EMI Levels of Conventional and Interleaved Buck Converters for Mobile Devices
TL;DR: In this article , the effect of five different random modulation switching schemes and their randomness levels on the elector magnetic interference (EMI) of designed simple and interleaved DC-DC buck converters for smartphone applications is analyzed.
Simple spread-spectrum pulse-modulation technique for EMI mitigation in power converters
Saad Ul Hasan,Yuba Raj Kafle,Graham Town +2 more
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TL;DR: In this article, a spread-spectrum pulse-modulation technique is proposed to reduce the peak EMI generated by switch-mode power converters, which is based on an aperiodic gate drive signal generated from two periodic signals, e.g. a sawtooth and a sinewave.
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