Analytical Expressions of Differential-Mode Harmonics in Loosely-Coupled Series-Resonant Wireless Power Transfer System

Abstract

The fundamental frequency approximation (FFA) for power transfer is commonly used to linearize a wireless power transfer (WPT) system which is equipped with non-linear switching converters such as a Class D inverter and rectifier. However, the FFA for power transfer disables us to analyze harmonics in a WPT system. The system characteristics only at the fundamental frequency can be analyzed with the FFA.In this paper, a new FFA for induced voltages is proposed so that analytical expressions of differential-mode voltage and current harmonics in a loosely-coupled series-resonant WPT system can be derived. Fourier series representations of the coil currents, inverter-output voltage, and rectifier-input voltage are derived and verified experimentally.

Meeting Name

2019 IEEE International Symposium on Electromagnetic Compatibility, Signal and Power Integrity, EMC+SIPI 2019 (2019: Jul. 22-26, New Orleans, LA)

Department(s)

Electrical and Computer Engineering

Research Center/Lab(s)

Electromagnetic Compatibility (EMC) Laboratory

Keywords and Phrases

Equivalent Circuit Model; Fourier Series Representation; Fundamental Frequency Approximation; Linearization; Wireless Power Transfer

International Standard Book Number (ISBN)

978-153869199-1

Document Type

Article - Conference proceedings

Document Version

Citation

File Type

text

Language(s)

English

Rights

© 2019 Institute of Electrical and Electronics Engineers (IEEE), All rights reserved.

Publication Date

26 Jul 2019

Link to Full Text

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