A thin, flexible receiving coil for wireless power transmission based on magnetic induction to an implantable device: Measuring the power efficiency of receiving coils with varying numbers of mounted magnetic sheets

2015 ◽  
Author(s):  
Ryutaro Iwashita ◽  
Masami Ishiwata ◽  
Yoji Takaguchi ◽  
Takashi Koike ◽  
Issei Hashimoto ◽  
...  
Keyword(s):  
Magnetic Induction ◽  
Power Efficiency ◽  
Power Transmission ◽  
Implantable Device ◽  
Wireless Power ◽  
Wireless Power Transmission ◽  
Receiving Coil

scholarly journals A Fractional-Order Element (FOE)-Based Approach to Wireless Power Transmission for Frequency Reduction and Output Power Quality Improvement

Electronics ◽  
2019 ◽  
Vol 8 (9) ◽  
pp. 1029 ◽  
Author(s):  
Guidong Zhang ◽  
Zuhong Ou ◽  
Lili Qu
Keyword(s):  
Fractional Order ◽  
High Frequency ◽  
Power Efficiency ◽  
Power Transmission ◽  
Switching Frequency ◽  
Wireless Power ◽  
Wireless Power Transmission ◽  
High Switching Frequency ◽  
Power Quality Improvement ◽  
Power Inductors

A wireless power transmission (WPT) requires high switching frequency to achieve energy transmission; however, existing switching devices cannot satisfy the requirements of high-frequency switching, and the efficiency of current WPT is too low. Compared with the traditional power inductors and capacitors, fractional-order elements (FOEs) in WPT can realize necessary functions though requiring a lower switching frequency, which leads to a more favorable high-frequency switching performance with a higher efficiency. In this study, a generalized fractional-order WPT (FO-WPT) is established, followed by a comprehensive analysis on its WPT performance and power efficiency. Through extensive simulations of typical FO wireless power domino-resonators (FO-WPDRS), the functionality of the proposed FO-WPT for medium and long-range WPT is demonstrated. The numerical results show that the proposed FOE-based WPT solution has a higher power efficiency and lower switching frequency than conventional methods.

scholarly journals Optimization Design for Receiving Coil with Novel Structure Based on Mutual Coupling Model in Wireless Power Transmission for Capsule Endoscope

Energies ◽  
2020 ◽  
Vol 13 (23) ◽  
pp. 6460
Author(s):  
Shuai Kuang ◽  
Guozheng Yan ◽  
Zhiwu Wang
Keyword(s):  
Optimization Design ◽  
Power Transmission ◽  
Biological Tissues ◽  
Mutual Inductance ◽  
Power Measurement ◽  
Capsule Endoscope ◽  
Wireless Power ◽  
Wireless Power Transmission ◽  
Sufficient Power ◽  
Receiving Coil

Wireless capsule endoscope (WCE) is a promising technology for noninvasive and painless imaging detection on gastrointestinal (GI) diseases. On the other hand, conventional endoscopes with wires could discomfort patients and cause them to vomit and aerosolize coronavirus if the patients are infected with COVID-19. However, there stands a technical bottleneck on power supply for the WCE. With the help of wireless power transmission technology, a hollow receiving coil (RC) is proposed to supply sufficient power and also minimize the size of WCE. A model on mutual inductance between transmitting and receiving coils is proposed to evaluate receiving power when the RC is in a different position and direction of patient’s GI tract. Based on the model, an optimal RC is built to obtain sufficient and stable power. Measurement of mutual inductance with the optimal RC validates high accuracy of the proposed model. The standard deviation of receiving power is very low. WCE with optimum RC gets sufficient power and captures images stably in live pig’s intestine tract. Additionally, the model is little affected by biological tissues. It ensures reliable performance of WCE and makes popular clinical application of WCE possible, which is also a relief to reduce epidemics like COVID-19.

Experimental Research on the Influence of Transmission Parameters on the Transmission Performance of Magnetic Resonance Wireless Power Transmission Systems

2014 ◽  
Vol 551 ◽  
pp. 393-398
Author(s):  
Chang Sheng Li ◽  
He Zhang ◽  
Xiao Hua Jiang
Keyword(s):  
Magnetic Resonance ◽  
Power Efficiency ◽  
High Efficiency ◽  
Power Transmission ◽  
Transmission Power ◽  
Wireless Power ◽  
Transmission Performance ◽  
Wireless Power Transmission ◽  
Transmission Systems ◽  
Transmission Parameters

Magnetic resonance wireless power transmission uses resonance strong coupling between the transmission and receiving terminals to realize a non-contact efficient supply of energy over large distance. The transmission power, efficiency and distance are confirmed by comprehensive function of the transmission parameters. By taking experimental means, the influence laws of loop transmission parameters, such as separation between coils, coil size, etc., on the transmission performance are studied in this paper. The experimental results show that the power high-efficiency and high-quality transmission does not depend on the large coil loop coupling coefficient and transmission power and efficiency may increase firstly and then decline as the separation between coils increases. The transmission performance can be optimized by increasing the coils diameter or wire diameter, and moreover, transmission systems with a high resonance frequency can produce high power and efficiency transmission over short distances.

Wireless power transmission with a sown auxiliary coil to improve power efficiency for an implantable device

2020 ◽  
Vol 64 (1-4) ◽  
pp. 843-851
Author(s):  
Ryunosuke Sasaki ◽  
Kohei Koizumi ◽  
Shogo Kiryu
Keyword(s):  
Magnetic Resonance ◽  
Power Efficiency ◽  
Power Transmission ◽  
Transmission System ◽  
Wireless Power ◽  
Wireless Power Transmission ◽  
Scaled Model ◽  
Cardioverter Defibrillator ◽  
The Poor ◽  
Power Transmission System

In this study, a magnetic resonance wireless power transmission system with a sown auxiliary coil is described. The system is proposed to deliver power to an “implantable cardioverter defibrillator” (ICD) device from a bed. The auxiliary coil is supposed to be sown in a shirt. With the coil, the poor coupling coefficient and the effective quality factor can be improved. In this study, the power efficiency was investigated on a magnetic resonance wireless power transmission system with a sown auxiliary coil by using a 1/2 scaled model. As a result, when transfer distance was 100 mm (200 mm in the full scaled model) and lord resistance was 20 Ω, the maximum transfer efficiency with an auxiliary coil was measured to be about 70% much higher than without that.

scholarly journals Development and Application of Wireless Power Transmission Systems for Wireless ECG Sensors

2018 ◽  
Vol 2018 ◽  
pp. 1-7
Author(s):  
Jin-Chul Heo ◽  
Jiae Park ◽  
Sohee Kim ◽  
Jeonghon Ku ◽  
Jong-Ha Lee
Keyword(s):  
Power Transmission ◽  
Animal Experiments ◽  
Transmission Efficiency ◽  
Wireless Power ◽  
Wireless Power Transmission ◽  
Actual Measurement ◽  
High Frequency Structure Simulator ◽  
Power Transmission Systems ◽  
Induction Type ◽  
Receiving Coil

We investigated the variations in the magnetic field distribution and power transmission efficiency, resulting from changes in the relative positions of the transmitting and receiving coils, for electromagnetic induction-type wireless power transmission using an elliptical receive coil. Results of simulations using a high-frequency structure simulator were compared to actual measurement results. The simulations showed that the transmission efficiency could be maintained relatively stable even if the alignment between the transmitting and receiving coils was changed to some extent. When the centre of the receiving coil was perfectly aligned with the centre of the transmitting coil, the transmission efficiency was in the maximum; however, the degree of decrease in the transmission efficiency was small even if the centre of the receiving coil moved by ±10 mm from the centre of the transmitting coil. Therefore, it is expected that the performance of the wireless power transmission system will not be degraded significantly even if perfect alignment is not maintained. Animal experiments confirmed good ECG signals for the simulation conditions. The results suggested a standardized application method of wireless transmission in the utilization of wireless power for implantable sensors.

A capsule robot powered by wireless power transmission: Design of its receiving coil

2015 ◽  
Vol 234 ◽  
pp. 133-142 ◽  
Author(s):  
Jinyang Gao ◽  
Guozheng Yan ◽  
Zhiwu Wang ◽  
Pingping Jiang ◽  
Dasheng Liu
Keyword(s):  
Power Transmission ◽  
Wireless Power ◽  
Wireless Power Transmission ◽  
Transmission Design ◽  
Receiving Coil ◽  
Capsule Robot
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