A Computational Study on the Magnetic Resonance Coupling Technique for Wireless Power Transfer

Zakaria, Nor Aini; Jusoh, M.; Ghazali, Normah Mohd.; Yasin, Mohd Najib Mohd; Sabapathy, Thennarasan; Osman, Mohamed Nasrun; Ahmad, Noordin; Zakaria, Mohd Hafiz

doi:10.1051/matecconf/201714001025

Cited by 2 publications

(4 citation statements)

References 7 publications

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“…The proposed system outperforms the systems reported in these previous studies in terms of both efficiency and power transfer at different distances. Figure 12 compares the WHR measurement accuracy for the proposed system with those found in several previous articles [19][20][21][22][23][24][25][50][51][52][53][54][55] to confirm the performance of the suggested system. It can be seen that the proposed system accuracy was superior to that of other related works.…”

Section: Comparison With Previous Workmentioning

confidence: 54%

“…However, it could only operate at a short distance. Zakaria et al [25] presented a WPT-based MRC technique for smart-home applications and medical systems; the working frequency for the MRC was 30-81 MHz. The MRC system included coils in the receiver and transmitter, a bridge, and a load.…”

Section: Related Workmentioning

confidence: 99%

“…Other authors have used WPT with MRC to enhance power transfer and efficiency at different air-gap distances between coils to supply medical devices. In addition, studies [22][23][24][25] have used statistical analyses to calculate the accuracy of measuring biomedical parameters, such as temperature and heart rate. The contributions of this study are as follows.…”

Section: Introductionmentioning

confidence: 99%

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Design of Powering Wireless Medical Sensor Based on Spiral-Spider Coils

Mahmood

Gharghan

Mohammed

et al. 2021

Designs

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Biomedical sensors help patients monitor their health conditions and receive assistance anywhere and at any time. However, the limited battery capacity of medical devices limits their functionality. One advantageous method to tackle this limited-capacity issue is to employ the wireless power transfer (WPT) technique. In this paper, a WPT technique using a magnetic resonance coupling (MRC-WPT)-based wireless heart rate (WHR) monitoring system—which continuously records the heart rate of patients—has been designed, and its efficiency is confirmed through real-time implementation. The MRC-WPT involves three main units: the transmitter, receiver, and observing units. In this research, a new design of spiral-spider coil was designed and implemented for transmitter and receiver units, respectively, to supply the measurement unit, which includes a heart rate sensor, microcontroller, and wireless protocol (nRF24L01) with the operating voltage. The experimental results found that an adequate voltage of 5 V was achieved by the power component to operate the measurement unit at a 20 cm air gap between the receiver and transmitter coils. Further, the measurement accuracy of the WHR was 99.65% comparative to the benchmark (BM) instrument. Moreover, the measurements of the WHR were validated based on statistical analyses. The results of this study are superior to those of leading works in terms of measurement accuracy, power transfer, and Transfer efficiency.

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Section: Comparison With Previous Workmentioning

confidence: 54%

Section: Related Workmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Design of Powering Wireless Medical Sensor Based on Spiral-Spider Coils

Mahmood

Gharghan

Mohammed

et al. 2021

Designs

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show abstract

“…It can be divided into three types: long-range (~m) [4], mid-range (~cm) [5], and short-range (~mm) [6]. MRC-WPT technology has been used in various locations and applications, such as household applications [7], electric vehicles [8,9], and implanted medical devices [10,11].…”

Section: Introductionmentioning

confidence: 99%

Reduction in Human Interaction with Magnetic Resonant Coupling WPT Systems with Grounded Loop

et al. 2021

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Wireless power transfer (WPT) systems have attracted considerable attention in relation to providing a reliable and convenient power supply. Among the challenges in this area are maintaining the performance of the WPT system with the presence of a human body and minimizing the induced physical quantities in the human body. This study proposes a magnetic resonant coupling WPT (MRC-WPT) system that utilizes a resonator with a grounded loop to mitigate its interaction with a human body and achieve a high-efficiency power transfer at a short range. Our proposed system is based on a grounded loop to reduce the leakage of the electric field, resulting in less interaction with the human body. As a result, a transmission efficiency higher than 70% is achieved at a transmission distance of approximately 25 cm. Under the maximum-efficiency conditions of the WPT system, the use of a resonator with a grounded loop reduces the induced electric field, the peak spatial-average specific absorption rate (psSAR), and the whole-body averaged SAR by 43.6%, 69.7%, and 65.6%, respectively. The maximum permissible input power values for the proposed WPT systems are 40 and 33.5 kW, as prescribed in the International Commission of Non-Ionizing Radiation Protection (ICNIRP) guidelines to comply with the limits for local and whole-body average SAR.

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A Computational Study on the Magnetic Resonance Coupling Technique for Wireless Power Transfer

Cited by 2 publications

References 7 publications

Design of Powering Wireless Medical Sensor Based on Spiral-Spider Coils

Design of Powering Wireless Medical Sensor Based on Spiral-Spider Coils

Reduction in Human Interaction with Magnetic Resonant Coupling WPT Systems with Grounded Loop

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