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Low-cost Multistage Direct-Coupled Linear Power Amplifier for Characterization of Magnetic Cores at Mulitple Frequencies

Ahmad, SS and Raj, A and Narayanan, G (2021) Low-cost Multistage Direct-Coupled Linear Power Amplifier for Characterization of Magnetic Cores at Mulitple Frequencies. In: 2021 National Power Electronics Conference, 15-17 Dec 2021, Bhubaneswar.

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Official URL: https://doi.org/10.1109/NPEC52100.2021.9672514

Abstract

Magnetic components such as inductors, transformers and integrated magnetics are important components in power electronic converters including grid-tied inverters, isolated DC-DC converters and high-frequency-link converters. The magnetic cores in such applications are excited by various frequency components. Hence a quantitative understanding of the magnetic behaviour of these cores at various frequencies is valuable to power electronics research and development. This paper reports a cost-effective, multistage, direct-coupled, linear power amplifier for characterization of magnetic cores of interest at various frequencies. Different stages of the proposed amplifier ensure high voltage gain, high current gain and closed-loop operation to eliminate offset and other such non-idealities. The components involved in the amplifier are of low cost, and the characterization method does not require any transformer. Transformerless operation and direct-coupled nature of the amplifier contribute to its wide operating frequency range. The linear amplifier is capable of operating over a frequency range from DC to 100 kHz. Measurement of B-H characteristics of a ferrite core using the developed amplifier is demonstrated at different frequencies. © 2021 IEEE.

Item Type: Conference Paper
Publication: 2021 National Power Electronics Conference, NPEC 2021
Publisher: Institute of Electrical and Electronics Engineers Inc.
Additional Information: The copyright for this article belongs to Institute of Electrical and Electronics Engineers Inc.
Department/Centre: Division of Electrical Sciences > Electrical Engineering
Date Deposited: 09 Mar 2022 10:26
Last Modified: 09 Mar 2022 10:26
URI: http://eprints.iisc.ac.in/id/eprint/71523

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