Design of Digital Robust Controller for a Class-D Amplifier Using A2DOF

Conference proceedings article

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Publication Details

Author list: Kaku K., Higuchi K., Jirasereeamornkul K.

Publisher: Elsevier

Publication year: 2016

Volume number: 86

Start page: 140

End page: 143

Number of pages: 4

ISSN: 1877-0509

URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84999751220&doi=10.1016%2fj.procs.2016.05.035&partnerID=40&md5=9264ab0cda7438fc81e0244685a4a830

Languages: English-Great Britain (EN-GB)

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Abstract

In recent years, it is desired that the bandwidth of a class-D amplifier is widened using sampling frequencies as low as possible. For example, it is expected in the application of the power supply of a low frequency immunity test, or an audio power amplifier, or the power amplifier of vibration generator. In this paper, it is shown that the bandwidth of the class-D amplifier can be widened to 20[kHz] by an A2DOF (Approximate 2-Degree-Of-Freedom) digital controller with 500[kHz] sampling frequencies. The controller is implemented by a DSP (digital signal processor). It is shown from experiments that 20[kHz] bandwidth can be maintained even if load changes. ฉ 2016 The Authors.

Keywords

A2DOF, class-D amplifier