Analysis and Design of Load-Independent Series Resonant Power Amplifier With Constant Current Output and Its Application for WPT System
This article presents an analysis and design of a load-independent (LI) series resonant (SR) power amplifier with constant current (CC) output, along with its application for an MHz wireless power transfer (WPT) system. A novel inverse Class E power amplifier is introduced, which essentially produce...
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| Published in: | IEEE transactions on power electronics Vol. 39; no. 5; pp. 6515 - 6525 |
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| Main Authors: | , , , , , |
| Format: | Journal Article |
| Language: | English |
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01-05-2024
The Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
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| Abstract | This article presents an analysis and design of a load-independent (LI) series resonant (SR) power amplifier with constant current (CC) output, along with its application for an MHz wireless power transfer (WPT) system. A novel inverse Class E power amplifier is introduced, which essentially produces a sinusoidal output current even with a low-<inline-formula><tex-math notation="LaTeX">Q</tex-math></inline-formula> SR filter. Besides, the proposed amplifier achieves zero-current switching and CC output simultaneously, regardless of the load resistance. The LI operation is obtained for a specific set of component values, whose design conditions are clarified analytically in this article. The experiment was carried out with a WPT system incorporating the proposed amplifier as a transmitter and the Class D rectifier as a receiver. Although the input reactance of the Class D rectifier changed against dc-load variations due to the parasitic capacitances, the proposed amplifier showed consistent CC operation by using the low-<inline-formula><tex-math notation="LaTeX">Q</tex-math></inline-formula> SR filter. Also, the proposed WPT system maintained a low total harmonic distortion of the transmission current over the wide load range, even with the low-<inline-formula><tex-math notation="LaTeX">Q</tex-math></inline-formula> output filter. The prototype WPT system with the proposed amplifier achieved 88% power-delivery efficiency with 60 W output power at 3.39 MHz transmission frequency. The experimental results showed the effectiveness of the proposed amplifier. |
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| AbstractList | This article presents an analysis and design of a load-independent (LI) series resonant (SR) power amplifier with constant current (CC) output, along with its application for an MHz wireless power transfer (WPT) system. A novel inverse Class E power amplifier is introduced, which essentially produces a sinusoidal output current even with a low-<inline-formula><tex-math notation="LaTeX">Q</tex-math></inline-formula> SR filter. Besides, the proposed amplifier achieves zero-current switching and CC output simultaneously, regardless of the load resistance. The LI operation is obtained for a specific set of component values, whose design conditions are clarified analytically in this article. The experiment was carried out with a WPT system incorporating the proposed amplifier as a transmitter and the Class D rectifier as a receiver. Although the input reactance of the Class D rectifier changed against dc-load variations due to the parasitic capacitances, the proposed amplifier showed consistent CC operation by using the low-<inline-formula><tex-math notation="LaTeX">Q</tex-math></inline-formula> SR filter. Also, the proposed WPT system maintained a low total harmonic distortion of the transmission current over the wide load range, even with the low-<inline-formula><tex-math notation="LaTeX">Q</tex-math></inline-formula> output filter. The prototype WPT system with the proposed amplifier achieved 88% power-delivery efficiency with 60 W output power at 3.39 MHz transmission frequency. The experimental results showed the effectiveness of the proposed amplifier. This article presents an analysis and design of a load-independent (LI) series resonant (SR) power amplifier with constant current (CC) output, along with its application for an MHz wireless power transfer (WPT) system. A novel inverse Class E power amplifier is introduced, which essentially produces a sinusoidal output current even with a low-[Formula Omitted] SR filter. Besides, the proposed amplifier achieves zero-current switching and CC output simultaneously, regardless of the load resistance. The LI operation is obtained for a specific set of component values, whose design conditions are clarified analytically in this article. The experiment was carried out with a WPT system incorporating the proposed amplifier as a transmitter and the Class D rectifier as a receiver. Although the input reactance of the Class D rectifier changed against dc-load variations due to the parasitic capacitances, the proposed amplifier showed consistent CC operation by using the low-[Formula Omitted] SR filter. Also, the proposed WPT system maintained a low total harmonic distortion of the transmission current over the wide load range, even with the low-[Formula Omitted] output filter. The prototype WPT system with the proposed amplifier achieved 88% power-delivery efficiency with 60 W output power at 3.39 MHz transmission frequency. The experimental results showed the effectiveness of the proposed amplifier. |
| Author | Komiyama, Yutaro Zhu, Wenqi Sekiya, Hiroo Nguyen, Kien Komanaka, Ayano Konishi, Akihiro |
| Author_xml | – sequence: 1 givenname: Yutaro orcidid: 0000-0002-9168-5054 surname: Komiyama fullname: Komiyama, Yutaro email: y.komiyama@chiba-u.jp organization: Graduate School of Science and Engineering, Chiba University, Chiba, Japan – sequence: 2 givenname: Ayano orcidid: 0000-0002-9704-8400 surname: Komanaka fullname: Komanaka, Ayano organization: Graduate School of Science and Engineering, Chiba University, Chiba, Japan – sequence: 3 givenname: Wenqi orcidid: 0000-0002-2385-1751 surname: Zhu fullname: Zhu, Wenqi organization: Graduate School of Science and Engineering, Chiba University, Chiba, Japan – sequence: 4 givenname: Akihiro orcidid: 0009-0008-4941-3435 surname: Konishi fullname: Konishi, Akihiro organization: Graduate School of Science and Engineering, Chiba University, Chiba, Japan – sequence: 5 givenname: Kien orcidid: 0000-0003-0400-3084 surname: Nguyen fullname: Nguyen, Kien organization: Graduate School of Science and Engineering, Chiba University, Chiba, Japan – sequence: 6 givenname: Hiroo orcidid: 0000-0003-3557-1463 surname: Sekiya fullname: Sekiya, Hiroo email: sekiya@faculty.chiba-u.jp organization: Graduate School of Science and Engineering, Chiba University, Chiba, Japan |
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| Snippet | This article presents an analysis and design of a load-independent (LI) series resonant (SR) power amplifier with constant current (CC) output, along with its... |
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| StartPage | 6515 |
| SubjectTerms | Constant current (CC) Design analysis Harmonic analysis Harmonic distortion Inductance inverse class e amplifier Load fluctuation Load resistance load-independent (LI) Power amplifiers Power harmonic filters Reactance Rectifiers Switches Switching frequency total harmonic distortion (THD) Voltage wireless power transfer (WPT) Wireless power transmission Zero current switching |
| Title | Analysis and Design of Load-Independent Series Resonant Power Amplifier With Constant Current Output and Its Application for WPT System |
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