Equivalent circuit of induction fed magnetic resonant WPT system

Hirayama, Hiroshi; Okuyama, Yuki; Kikuma, Nobuyoshi; Sakakibara, Kunio

doi:10.1109/imws.2011.5877120

Cited by 9 publications

(5 citation statements)

References 2 publications

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“…In the proposed magnetic coupled resonant WPT system, the radiation loss is negligible and high transfer efficiency can be achieved. The coupled-mode theory [24] and the equivalent circuit model [25] are usually used to explain the principle of magnetic resonance-based WPT. Although the coupled-mode theory essentially analyses the operating principle of magnetic coupled resonant wireless power transmission, it is only a qualitative analysis and cannot objectively reflect the relationship between system parameters.…”

Section: Modelling Of Wpt System With Series-parallel and Series (S-pmentioning

confidence: 99%

S‐PS resonant topology of WPT system for implantable spinal cord stimulator

Qiu

Meng

et al. 2018

IET Power Electronics

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Magnetic resonance-based wireless power transfer (WPT) system offers a promising solution to provide power for implantable spinal cord stimulator (SCS). To meet with the clinical requirements, the SCS-WPT system should have high transfer efficiency and long transfer distance. As the topology of the resonant network will directly affect the transfer efficiency and output power of the WPT system, a new resonant network, series-parallel and series (S-PS), is selected in this work. The performance of WPT system with S-PS resonant network has been compared with those with the classic resonance networks, it is concluded that S-PS is the suitable resonant network for the WPT system in a wide range of load. Finally, an SCS-WPT prototype with S-PS resonant network is built with detailed parameter design to verify the correctness of theoretical analysis. The system efficiency is up to 68.4% at a coil separation of 50 mm.

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Section: Modelling Of Wpt System With Series-parallel and Series (S-pmentioning

confidence: 99%

S‐PS resonant topology of WPT system for implantable spinal cord stimulator

Qiu

Meng

et al. 2018

IET Power Electronics

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“…Microwave power transfer (MPT) system [1,2] has an advantage of long-distance transmission, compared to nearfield power transfer system [3][4][5][6][7][8][9][10][11]. To achieve MPT, an efficient power amplifier is essential.…”

Section: Introductionmentioning

confidence: 99%

Microstrip patch antenna with class-F load and DC block function for microwave power transfer

Oshima

Ban

Hirayama

2021

IEICE Electron. Express

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This study proposes a novel microstrip patch antenna for microwave power transfer that functions as a class-F load and DC block. These functions enable a direct connection between an antenna and a power device (field-effect transistor) without using a class-F load circuit and capacitor for a DC block. In numerical simulations of a 2.45-GHz antenna, a reflection coefficient is -21.27 dB at the fundamental frequency, and a reflection coefficient and phase at the 3rd harmonic frequency are -0.99 dB and -1.4º, respectively. The simulated gain is 5.59 dBi at 2.45 GHz.

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“…For instance, wireless charging by magnetic resonance [1], [2] is widely used in biomedical devices [3] and has been examined for electrical vehicles [4]. Other WPT approaches include magnetic induction by reactive near-field coupling [5]. The alternative technique described in our paper is based on electromagnetic free-space radiation and an efficient rectifier is newly reported for demonstration in such a microwave transmission system (MTS).…”

Section: Introductionmentioning

confidence: 99%

“…It should be made clear that the proposed rectifier and WPT system is not intended as a replacement for the conventional wired charging, but can be considered as complimentary as in the adopted DUT scenario. This can improve the quality of the users' experience, and flexibility for device battery charging, instead of relying on previous magnetic induction approaches [1]- [5], which typically require some type of pad or surface technology for more localized WPT, as well as more common wired charging approaches which require ac to dc converters and other power supply circuitry. Fig.…”

Section: Introductionmentioning

confidence: 99%