Approximate 2-Degree-Of-Freedom control of a class-D amplifier using FPGA

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Publication Details

Author list: Hanabusa K., Higuchi K., Sato T., Jirasereeamornkul K.

Publisher: Hindawi

Publication year: 2016

ISBN: 9781467397490

ISSN: 0146-9428

eISSN: 1745-4557

URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84988850993&doi=10.1109%2fECTICon.2016.7561334&partnerID=40&md5=6fd08d813404c796c387a32021f226a5

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 amplifier of vibration generator that the bandwidth is kept 5[kHz] within the load impedance ∞∼2 []. In this paper, it is shown that this demand to the class-D amplifier can be attained by an A2DOF (Approximate 2-Degree-Of-Freedom) digital controller with 200[kHz] switching and sampling frequencies. The controller is implemented by a FPGA and it is shown from experiments that this demand is attained enough. © 2016 IEEE.

Keywords

A2DOF Control, class-D amplifier, digital control, FPGA, robust control