A high efficiency 3.3 kW loosely-coupled wireless power transfer system without magnetic material

Fei Lu; Hua Zhang; Heath Hofmann; Chris Mi

doi:10.1109/ECCE.2015.7309981

A high efficiency 3.3 kW loosely-coupled wireless power transfer system without magnetic material

Fei Lu, Hua Zhang, Heath Hofmann, Chris Mi

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

70 Scopus citations

Abstract

This paper proposes a loosely-coupled wireless power transfer (WPT) system without magnetic material, which has 95.0% dc-to-dc efficiency working at 1MHz and 3.3kW output power. The coil size is 320mm×320mm, and the coupling coefficient k is 14.0% at 150mm air-gap distance. The magnetic material is removed to increase system switching frequency to MHz level and eliminate the magnetic losses. Power loss models of the circuit components are presented to calculate the total losses and the system efficiency. It shows that, through designing the circuit parameters to minimize the power losses, the maximum achievable efficiency can be higher than 95% even at a coupling coefficient of 10%. This paper provides the guideline for high-frequency and high efficiency WPT system design.

Original language	English (US)
Title of host publication	2015 IEEE Energy Conversion Congress and Exposition, ECCE 2015
Publisher	Institute of Electrical and Electronics Engineers Inc.
Pages	2282-2286
Number of pages	5
ISBN (Electronic)	9781467371506
DOIs	https://doi.org/10.1109/ECCE.2015.7309981
State	Published - Oct 27 2015
Externally published	Yes
Event	7th Annual IEEE Energy Conversion Congress and Exposition, ECCE 2015 - Montreal, Canada Duration: Sep 20 2015 → Sep 24 2015

Publication series

Name	2015 IEEE Energy Conversion Congress and Exposition, ECCE 2015

Conference

Conference	7th Annual IEEE Energy Conversion Congress and Exposition, ECCE 2015
Country/Territory	Canada
City	Montreal
Period	9/20/15 → 9/24/15

All Science Journal Classification (ASJC) codes

Energy Engineering and Power Technology
Electrical and Electronic Engineering

Access to Document

10.1109/ECCE.2015.7309981

Cite this

Lu, F., Zhang, H., Hofmann, H., & Mi, C. (2015). A high efficiency 3.3 kW loosely-coupled wireless power transfer system without magnetic material. In 2015 IEEE Energy Conversion Congress and Exposition, ECCE 2015 (pp. 2282-2286). Article 7309981 (2015 IEEE Energy Conversion Congress and Exposition, ECCE 2015). Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/ECCE.2015.7309981

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abstract = "This paper proposes a loosely-coupled wireless power transfer (WPT) system without magnetic material, which has 95.0% dc-to-dc efficiency working at 1MHz and 3.3kW output power. The coil size is 320mm×320mm, and the coupling coefficient k is 14.0% at 150mm air-gap distance. The magnetic material is removed to increase system switching frequency to MHz level and eliminate the magnetic losses. Power loss models of the circuit components are presented to calculate the total losses and the system efficiency. It shows that, through designing the circuit parameters to minimize the power losses, the maximum achievable efficiency can be higher than 95% even at a coupling coefficient of 10%. This paper provides the guideline for high-frequency and high efficiency WPT system design.",

author = "Fei Lu and Hua Zhang and Heath Hofmann and Chris Mi",

note = "Publisher Copyright: {\textcopyright} 2015 IEEE.; 7th Annual IEEE Energy Conversion Congress and Exposition, ECCE 2015 ; Conference date: 20-09-2015 Through 24-09-2015",

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Lu, F, Zhang, H, Hofmann, H & Mi, C 2015, A high efficiency 3.3 kW loosely-coupled wireless power transfer system without magnetic material. in 2015 IEEE Energy Conversion Congress and Exposition, ECCE 2015., 7309981, 2015 IEEE Energy Conversion Congress and Exposition, ECCE 2015, Institute of Electrical and Electronics Engineers Inc., pp. 2282-2286, 7th Annual IEEE Energy Conversion Congress and Exposition, ECCE 2015, Montreal, Canada, 9/20/15. https://doi.org/10.1109/ECCE.2015.7309981

A high efficiency 3.3 kW loosely-coupled wireless power transfer system without magnetic material. / Lu, Fei; Zhang, Hua; Hofmann, Heath et al.
2015 IEEE Energy Conversion Congress and Exposition, ECCE 2015. Institute of Electrical and Electronics Engineers Inc., 2015. p. 2282-2286 7309981 (2015 IEEE Energy Conversion Congress and Exposition, ECCE 2015).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

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N2 - This paper proposes a loosely-coupled wireless power transfer (WPT) system without magnetic material, which has 95.0% dc-to-dc efficiency working at 1MHz and 3.3kW output power. The coil size is 320mm×320mm, and the coupling coefficient k is 14.0% at 150mm air-gap distance. The magnetic material is removed to increase system switching frequency to MHz level and eliminate the magnetic losses. Power loss models of the circuit components are presented to calculate the total losses and the system efficiency. It shows that, through designing the circuit parameters to minimize the power losses, the maximum achievable efficiency can be higher than 95% even at a coupling coefficient of 10%. This paper provides the guideline for high-frequency and high efficiency WPT system design.

AB - This paper proposes a loosely-coupled wireless power transfer (WPT) system without magnetic material, which has 95.0% dc-to-dc efficiency working at 1MHz and 3.3kW output power. The coil size is 320mm×320mm, and the coupling coefficient k is 14.0% at 150mm air-gap distance. The magnetic material is removed to increase system switching frequency to MHz level and eliminate the magnetic losses. Power loss models of the circuit components are presented to calculate the total losses and the system efficiency. It shows that, through designing the circuit parameters to minimize the power losses, the maximum achievable efficiency can be higher than 95% even at a coupling coefficient of 10%. This paper provides the guideline for high-frequency and high efficiency WPT system design.

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Lu F, Zhang H, Hofmann H, Mi C. A high efficiency 3.3 kW loosely-coupled wireless power transfer system without magnetic material. In 2015 IEEE Energy Conversion Congress and Exposition, ECCE 2015. Institute of Electrical and Electronics Engineers Inc. 2015. p. 2282-2286. 7309981. (2015 IEEE Energy Conversion Congress and Exposition, ECCE 2015). doi: 10.1109/ECCE.2015.7309981

A high efficiency 3.3 kW loosely-coupled wireless power transfer system without magnetic material

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