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Wireless Power Hanger Pad for Portable Wireless Audio Device Power Charger Application

Author

Listed:
  • Win-Jet Luo

    (Graduate Institute of Precision Manufacturing, National Chin-Yi University of Technology, Taichung 41170, Taiwan)

  • C. Bambang Dwi Kuncoro

    (Graduate Institute of Precision Manufacturing, National Chin-Yi University of Technology, Taichung 41170, Taiwan
    Electrical and Instrumentation Laboratory, Politeknik Negeri Bandung, Bandung 40012, Indonesia)

  • Yean-Der Kuan

    (Department of Refrigeration, Air Conditioning and Energy Engineering, National Chin-Yi University of Technology, Taichung 41170, Taiwan)

Abstract

Since the portability feature has been introduced in headphone development, this device now uses a battery as the main built-in power. However, the battery has limited power capacity and a short lifetime. Battery substitution and a conventional battery charger method is an ineffective, inflexible inconvenience for enhancing the user experience. This paper presents an innovative portable audio device battery built-in charger method based on wireless power technology. The developed charging device is composed of a headphone hanger pad for the wireless headphone and a charging pad for the portable wireless audio device battery charging. Circular flat spiral air-core coil was designed and evaluated using a numerical method to obtain optimal vertical magnetic field distribution based on the proposed evaluation criteria. A coil has inner coil diameter of 25 mm, outer coil diameter of 47.8 mm, wire diameter of 0.643 mm, the pitch of 0.03 mm and a number of turns of 17 was chosen to be implemented on the transmitter coil. A magnetic induction technique was adopted in the proposed wireless power transmission module which was implemented using commercial off-the-shelf components. For experimental and validation purposes, a developed receiver module applied to the commercial wireless headphone and portable audio speaker have a built-in battery capacity at 3.7 V 300 mAh. The experimental results show that the wireless power hanger pad prototype can transfer a 5 V induction voltage at a maximum current of 1000 mA, and the power transfer efficiency is around 70%. It works at 110 kHz of operation frequency with a maximum transmission distance of about 10 mm and takes 1 h to charge fully one 3.7 V 300 mAh polymer lithium battery.

Suggested Citation

  • Win-Jet Luo & C. Bambang Dwi Kuncoro & Yean-Der Kuan, 2020. "Wireless Power Hanger Pad for Portable Wireless Audio Device Power Charger Application," Energies, MDPI, vol. 13(2), pages 1-18, January.
    • Handle: RePEc:gam:jeners:v:13:y:2020:i:2:p:419-:d:308907
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    References listed on IDEAS

    as
    1. Yan Lu & Dongsheng Brian Ma, 2016. "Wireless Power Transfer System Architectures for Portable or Implantable Applications," Energies, MDPI, vol. 9(12), pages 1-16, December.
    2. Win-Jet Luo & C. Bambang Dwi Kuncoro & Pratikto & Yean-Der Kuan, 2019. "Single-Layer Transmitter Array Coil Pattern Evaluation toward a Uniform Vertical Magnetic Field Distribution," Energies, MDPI, vol. 12(21), pages 1-20, October.
    3. Barman, Surajit Das & Reza, Ahmed Wasif & Kumar, Narendra & Karim, Md. Ershadul & Munir, Abu Bakar, 2015. "Wireless powering by magnetic resonant coupling: Recent trends in wireless power transfer system and its applications," Renewable and Sustainable Energy Reviews, Elsevier, vol. 51(C), pages 1525-1552.
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