Application of random PWM technique for reducing the high frequency harmonics in class-D amplifier

Application of random PWM technique for reducing the high frequency harmonics in class-D amplifier

A PWM controlled class-D amplifier generates harmonics at switching frequency and its multiples. In this paper, the Random PWM (RPWM) technique is applied in order to spread the noise spectrum over a wide range, thus, considerably reducing amplitudes of these harmonics and the consequent EMI problem...

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Hauptverfasser: Kaboli, S, Moayedi, A, Oraee, H
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Sprache:eng
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Amplifiers
Electromagnetic compatibility and interference
Power electronics, supply and supervisory circuits
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Moayedi, A
Oraee, H
description A PWM controlled class-D amplifier generates harmonics at switching frequency and its multiples. In this paper, the Random PWM (RPWM) technique is applied in order to spread the noise spectrum over a wide range, thus, considerably reducing amplitudes of these harmonics and the consequent EMI problems. A Line Impedance Stabilization Network (LISN) is used to study the RF noise emanating from the converter. Simulation and experimental results confirm the validity method and demonstrate the effectiveness of applying the RPWM technique in reducing the RF noise level.
doi_str_mv 10.1049/cp:20080553
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source IEEE Electronic Library (IEL) Conference Proceedings
subjects Amplifiers
Electromagnetic compatibility and interference
Power electronics, supply and supervisory circuits
title Application of random PWM technique for reducing the high frequency harmonics in class-D amplifier
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