Open loop dynamic transmitter voltage scaling for fast response and wide load range power efficient WPT system

Toru Kawajiri, Hiroki Ishikuro

    研究成果: Conference contribution

    2 引用 (Scopus)

    抜粋

    This paper presents a fast response wireless power delivery system with open loop dynamic transmitter voltage scaling technique to keep power efficiency in wide load range. In this technique, according to change of receiver side power consumption, the driving voltage of the transmitter (TX) coil is properly adjusted to control transmission power. The transmitting power and switching loss can be reduced in proportion to the square of the driving voltage. Therefore, it can improve power efficiency. To enhance power control speed, the driving voltage is not locally regulated but automatically determined by the feedback loop of the total WPT system. Fabricated test chips in 180-nm LDMOS process achieved maximum power efficiency of 50.9% when the output power is 0.5W. The output power ranges from 0.03W to 0.5W. The output voltage ripple is kept within 3.5% even when the output power is abruptly changed by one order of magnitude.

    元の言語English
    ホスト出版物のタイトル2017 IEEE MTT-S International Microwave Symposium, IMS 2017
    出版者Institute of Electrical and Electronics Engineers Inc.
    ページ315-317
    ページ数3
    ISBN(電子版)9781509063604
    DOI
    出版物ステータスPublished - 2017 10 4
    イベント2017 IEEE MTT-S International Microwave Symposium, IMS 2017 - Honololu, United States
    継続期間: 2017 6 42017 6 9

    Other

    Other2017 IEEE MTT-S International Microwave Symposium, IMS 2017
    United States
    Honololu
    期間17/6/417/6/9

    ASJC Scopus subject areas

    • Radiation
    • Condensed Matter Physics
    • Electrical and Electronic Engineering

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  • これを引用

    Kawajiri, T., & Ishikuro, H. (2017). Open loop dynamic transmitter voltage scaling for fast response and wide load range power efficient WPT system. : 2017 IEEE MTT-S International Microwave Symposium, IMS 2017 (pp. 315-317). [8059107] Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/MWSYM.2017.8059107