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A Class-E Amplifier for a Loosely Coupled Inductive Power Transfer System with Multiple Receivers

Author

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  • Alexander Sutor

    (Institute of Measurement and Sensor Technology, UMIT—Private University for Health Sciences, Medical Informatics and Technology GmbH, Eduard-Wallnöfer-Zentrum 1, 6060 Hall in Tirol, Austria)

  • Martin Heining

    (Institute of Bioprocess Engineering, Friedrich-Alexander-University Erlangen-Nuremberg, Paul-Gordan-Straße 3, 91052 Erlangen, Germany)

  • Rainer Buchholz

    (Institute of Bioprocess Engineering, Friedrich-Alexander-University Erlangen-Nuremberg, Paul-Gordan-Straße 3, 91052 Erlangen, Germany)

Abstract

We present a method for optimizing the electronic power system for a new type of photobioreactor or photoreactor in general. In the case of photobioreactors, photosynthetic active microorganisms or cells are grown. A novel concept for the illumination of photobioreactors was necessary, as the external illumination of those reactors leads to a limited penetration depth of light. Due to the limited penetration depth, no standard reactors can be use for cultivation, but custom made reactors with very small volume to surface ratio have to be used. This still prevents the technology from a large scale industrial impact. The solution we propose in this paper is an internal illumination via Wireless Light Emitters. This increases the manageable culture volume of photosynthetic active microorganisms or cells. The illumination system is based on floating light emitters, which are powered wirelessly by near field resonant inductive coupling. The floating light emitters are able to illuminate a photobioreactor more homogeneously than external illumination systems do. We designed a class-E amplifier and field coils to produce an intermediate frequency electromagnetic field inside the reactor. An appropriate magnetic flux density was found to be approx. B = 1 mT and the driving frequency is f = 176 kHz. We conducted experiments with a laboratory size photoreactor. The cultivation volume was 30 L containing up to 3000 WLEs. The maximum electric power input was more than 300 W and we calculated an efficiency of up to 76%.

Suggested Citation

  • Alexander Sutor & Martin Heining & Rainer Buchholz, 2019. "A Class-E Amplifier for a Loosely Coupled Inductive Power Transfer System with Multiple Receivers," Energies, MDPI, vol. 12(6), pages 1-15, March.
    • Handle: RePEc:gam:jeners:v:12:y:2019:i:6:p:1165-:d:217149
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    References listed on IDEAS

    as
    1. Sun-Han Hwang & Chung G. Kang & Yong-Ho Son & Byung-Jun Jang, 2015. "Software-Based Wireless Power Transfer Platform for Various Power Control Experiments," Energies, MDPI, vol. 8(8), pages 1-13, July.
    2. Villa, Juan Luis & Sallán, Jesús & Llombart, Andrés & Sanz, José Fco, 2009. "Design of a high frequency Inductively Coupled Power Transfer system for electric vehicle battery charge," Applied Energy, Elsevier, vol. 86(3), pages 355-363, March.
    3. Weili Dai & Wei Tang & Changchun Cai & Lihua Deng & Xiaofeng Zhang, 2018. "Wireless Power Charger Based on Class E Amplifier with the Maximum Power Point Load Consideration," Energies, MDPI, vol. 11(9), pages 1-13, September.
    4. Ui-Gyu Choi & Jong-Ryul Yang, 2018. "A 120 W Class-E Power Module with an Adaptive Power Combiner for a 6.78 MHz Wireless Power Transfer System," Energies, MDPI, vol. 11(8), pages 1-15, August.
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    Cited by:

    1. David Demetz & Alexander Sutor, 2022. "Inductively Powered Sensornode Transmitter Based on the Interconnection of a Colpitts and a Parallel Resonant LC Oscillator," Energies, MDPI, vol. 15(17), pages 1-16, August.

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