Nonlinear control-based class-D amplifier for audio intelligent infrastructure applications

被引：0

作者：

Joshi, Sridhar ^{[1
]}

Priscila, S. Silvia ^{[2
]}

Rajest, S. Suman ^{[3
]}

Srivastava, Kriti ^{[4
]}

Surendhar, S. Prasath Alias ^{[5
]}

Rajasekaran, Rajkumar ^{[6
]}

机构：

[1] Thapar Inst Engn & Technol, Elect & Instrumentat Engn Dept, Patiala 147003, India

[2] Bharath Inst Higher Educ & Res, Dept Comp Sci, Chennai 600126, Tamil Nadu, India

[3] Bharath Inst Higher Educ & Res, Dept Res, Chennai 600126, Tamil Nadu, India

[4] DJ Sanghvi Coll Engn, Dept Comp Sci & Engn Data Sci, Mumbai, India

[5] Aarupadai Veedu Inst Technol AVIT, Dept Biomed Engn, Chennai, Tamil Nadu, India

[6] Vellore Inst Technol, Sch Comp Sci & Engn, Vellore 632014, Tamil Nadu, India

来源：

INTERNATIONAL JOURNAL OF CRITICAL INFRASTRUCTURES | 2024年 / 20卷 / 04期

关键词：

nonlinear control; class-D; amplifier; audio applications; intelligent infrastructures; power supply noise; robustness; half-bridge audio amplifier; HBAA; PWM wave; variable structure system; VSS; POWER;

D O I：

10.1504/IJCIS.2024.140554

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

A nonlinear control-based class-D amplifier using a DC power source for medium-power audio applications is proposed in this paper. The amplifier utilises switches in a half-bridge configuration to realise the class-D power stage. A passive second-order bandpass filter is cascaded with the power stage to render a highly linear audio amplifier for high-quality audio reproduction. A nonlinear technique-based controller is used for a closed-loop amplifier system which offers high immunity to power supply noise, robustness, and fault tolerance without using a triangular carrier generator. An 80 W, 20 Hz to 20 kHz amplifier model is developed considering the nonlinearity present in the power electronic switches of the power stage. Simulation results of the proposed amplifier with a full range 4 Omega loudspeaker load are presented. The amplifier's response at different frequencies in the audio spectrum is presented, which confirms the amplifier's linearity and command following property. To confirm the high linearity of the amplifier, the THD versus frequency plot is depicted, which ensures the suitability of the proposed amplifier for high-fidelity audio amplification.

引用

页数：21

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