Analysis of the influence of load inductance on nonlinear distortions of a class D amplifier caused by «dead time»

Goal. Analysis of the effect of load inductance at the output of the class D amplifier for different values of the duration of «dead time» and assessment of the adequacy of existing mathematical models for calculating the THD at the output of the amplifier depending on the duration of «dead time». M...

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Autores principales:	S. A. Naida, Y. O. Onykienko, O. I. Drozdenko, O. I. Smolenska, V. S. Baran, N. O. Iakunina
Formato:	article
Lenguaje:	EN RU UK
Publicado:	National Technical University "Kharkiv Polytechnic Institute" 2021
Materias:	gan transistors class-d amplifier nonlinear distortion dead time thd Electrical engineering. Electronics. Nuclear engineering TK1-9971
Acceso en línea:	https://doaj.org/article/b35b98176607402196bac05c3cbc225d
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spelling	oai:doaj.org-article:b35b98176607402196bac05c3cbc225d2021-12-02T14:35:12ZAnalysis of the influence of load inductance on nonlinear distortions of a class D amplifier caused by «dead time»10.20998/2074-272X.2021.3.052074-272X2309-3404https://doaj.org/article/b35b98176607402196bac05c3cbc225d2021-06-01T00:00:00Zhttp://eie.khpi.edu.ua/article/view/228354/233441https://doaj.org/toc/2074-272Xhttps://doaj.org/toc/2309-3404Goal. Analysis of the effect of load inductance at the output of the class D amplifier for different values of the duration of «dead time» and assessment of the adequacy of existing mathematical models for calculating the THD at the output of the amplifier depending on the duration of «dead time». Methodology. The study of the effect of «dead time» on the THD was performed using a computer model of the half-bridge converter board EPC9035 from Efficient Power Conversion. This board contains GaN transistors EPC2022 eGaN®, the corresponding control driver and other necessary elements for operation. The use of GaN transistors has made it possible to investigate the operation in a wide range of frequent switching, both to control the motor and to amplify the audio signal. Results. It is established that the value of load inductance affects the level of nonlinear distortions caused by «dead time». At inductance values that provide a constant sign of the output current, a difference arises between the duration of the input and output pulses, which increases the THD. At inductance values, when the choke current changes sign during a pulse, there is no error between the duration of the input and output pulses. Changing the inductance changes the relationship between the error signal and the non-error signal. THD changes accordingly. At high conversion frequencies, the voltage spikes caused by the choke current through the built-in diodes during the dead time are partially compensated by overcharging the output capacitance of the transistors, which also reduces harmonic distortion. Originality. For the first time, the value of the THD at the outlets in the fallowness of the different indices of the inductance of the choke and the theoretical calculation of the value in the results of the computer model was obtained. Practical significance. The dependence of the THD values on the inductance of the choke for converters with a switching frequency range from 1 kHz to 400 kHz, which allows them to be used both to control the motor and to amplify the audio signal.S. A. NaidaY. O. OnykienkoO. I. DrozdenkoO. I. SmolenskaV. S. BaranN. O. IakuninaNational Technical University "Kharkiv Polytechnic Institute"articlegan transistorsclass-d amplifiernonlinear distortiondead timethdElectrical engineering. Electronics. Nuclear engineeringTK1-9971ENRUUKElectrical engineering & Electromechanics, Iss 3, Pp 32-37 (2021)
institution	DOAJ
collection	DOAJ
language	EN RU UK
topic	gan transistors class-d amplifier nonlinear distortion dead time thd Electrical engineering. Electronics. Nuclear engineering TK1-9971
spellingShingle	gan transistors class-d amplifier nonlinear distortion dead time thd Electrical engineering. Electronics. Nuclear engineering TK1-9971 S. A. Naida Y. O. Onykienko O. I. Drozdenko O. I. Smolenska V. S. Baran N. O. Iakunina Analysis of the influence of load inductance on nonlinear distortions of a class D amplifier caused by «dead time»
description	Goal. Analysis of the effect of load inductance at the output of the class D amplifier for different values of the duration of «dead time» and assessment of the adequacy of existing mathematical models for calculating the THD at the output of the amplifier depending on the duration of «dead time». Methodology. The study of the effect of «dead time» on the THD was performed using a computer model of the half-bridge converter board EPC9035 from Efficient Power Conversion. This board contains GaN transistors EPC2022 eGaN®, the corresponding control driver and other necessary elements for operation. The use of GaN transistors has made it possible to investigate the operation in a wide range of frequent switching, both to control the motor and to amplify the audio signal. Results. It is established that the value of load inductance affects the level of nonlinear distortions caused by «dead time». At inductance values that provide a constant sign of the output current, a difference arises between the duration of the input and output pulses, which increases the THD. At inductance values, when the choke current changes sign during a pulse, there is no error between the duration of the input and output pulses. Changing the inductance changes the relationship between the error signal and the non-error signal. THD changes accordingly. At high conversion frequencies, the voltage spikes caused by the choke current through the built-in diodes during the dead time are partially compensated by overcharging the output capacitance of the transistors, which also reduces harmonic distortion. Originality. For the first time, the value of the THD at the outlets in the fallowness of the different indices of the inductance of the choke and the theoretical calculation of the value in the results of the computer model was obtained. Practical significance. The dependence of the THD values on the inductance of the choke for converters with a switching frequency range from 1 kHz to 400 kHz, which allows them to be used both to control the motor and to amplify the audio signal.
format	article
author	S. A. Naida Y. O. Onykienko O. I. Drozdenko O. I. Smolenska V. S. Baran N. O. Iakunina
author_facet	S. A. Naida Y. O. Onykienko O. I. Drozdenko O. I. Smolenska V. S. Baran N. O. Iakunina
author_sort	S. A. Naida
title	Analysis of the influence of load inductance on nonlinear distortions of a class D amplifier caused by «dead time»
title_short	Analysis of the influence of load inductance on nonlinear distortions of a class D amplifier caused by «dead time»
title_full	Analysis of the influence of load inductance on nonlinear distortions of a class D amplifier caused by «dead time»
title_fullStr	Analysis of the influence of load inductance on nonlinear distortions of a class D amplifier caused by «dead time»
title_full_unstemmed	Analysis of the influence of load inductance on nonlinear distortions of a class D amplifier caused by «dead time»
title_sort	analysis of the influence of load inductance on nonlinear distortions of a class d amplifier caused by «dead time»
publisher	National Technical University "Kharkiv Polytechnic Institute"
publishDate	2021
url	https://doaj.org/article/b35b98176607402196bac05c3cbc225d
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Analysis of the influence of load inductance on nonlinear distortions of a class D amplifier caused by «dead time»

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