Improvement in Power Transmission Efficiency for Cavity Resonance-Enabled Wireless Power Transfer by Utilizing Probes With Variable Reactance

Nimura, Shinji; Furusu, Daigo; Tamura, Masaya

doi:10.1109/tmtt.2019.2956028

Cited by 11 publications

(3 citation statements)

References 23 publications

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“…High-frequency alternating current generates a high-frequency magnetic field. According to Faraday's law of electromagnetic induction, the magnetic field is coupled and transmitted to the secondary side of the isolation transformer to form high-frequency AC, which is finally rectified and filtered to provide energy [25]. Figure 7 displays the specific structure.…”

Section: Wptmentioning

confidence: 99%

Deep Learning Optimization of Microgrid Economic Dispatch and Wireless Power Transmission Using Blockchain

Chen

Guo

Zhao

et al. 2022

Wireless Communications and Mobile Computing

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The purpose is to realize the decentralized microgrid economic dispatch, improve the information transparency and security of microgrid systems, and make the power grid move towards a clean, safe, efficient, and reliable development path. Deep learning optimization of microgrid economic dispatch and wireless power transmission based on blockchain technology are studied. First, the related theories and methods of microgrid systems, wireless power transmission, and deep learning optimization based on blockchain technology are introduced. Next, the microgrid economic dispatch is simulated and analyzed on a large scale. Finally, the comparison results between microgrid economic dispatch and common radio energy transmission technologies are analyzed. The results show that daily planning can better coordinate the state of distributed generation, energy storage system, and public connection. The operation results of the previous day correspond to the long-term operation economy of the microgrid. The total operation cost of the microgrid is 4668 yuan/day, and the remaining power is maintained between 500 and 600 kW, which helps to prevent excessive battery discharge, prolong battery life, and reduce operation cost. The simulation results show that the total power imbalance of the microgrid can reduce the output fluctuation of controllable load shedding of distributed generation. When the load characteristics are not important, the output fluctuation of controllable distributed generation can be reduced. The proposed economic dispatch model can optimize the data security, information storage, and information release of the microgrid and has a certain guiding role for the development of the national power grid and power industry.

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Section: Wptmentioning

confidence: 99%

Deep Learning Optimization of Microgrid Economic Dispatch and Wireless Power Transmission Using Blockchain

Chen

Guo

Zhao

et al. 2022

Wireless Communications and Mobile Computing

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show abstract

“…The system assumes that manufacturing equipment and wireless sensors are inserted inside the cavity resonator and not that the human body is inserted. Previous studies have not focused on environmental changes inside the cavity resonator, such as changes in the number of power receivers [17]- [23]. In CR-WPT, the wave impedance changes depending on the installation state of objects inside the structure.…”

Section: Introductionmentioning

confidence: 99%

System Design of Cavity Resonance-Enabled Wireless Power Transfer Based on Filter Design Theory

Tamura,

Saeki,

Tamura

2024

IEEE Access

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This study aims to realize an efficient system operation using wireless sensor networks (WSNs), which have been increasing in demand in recent years. To achieve this, a cavity resonanceenabled wireless power transfer (CR-WPT) technique has been proposed. The CR-WPT system is a WPT system that utilizes the cavity resonance phenomenon inside the cavity. This study solves the impedance mismatch problem caused by the resonance frequency changes depending on the installation condition of objects in the cavity resonator, which results in a power transmission efficiency(PTE) decrease. We propose the implementation of J-inverters and additional resonators outside and inside the cavity resonator and the configuration of a three-stage band-pass filter(BPF) to achieve broadband matching. The EM analysis results show that adding the J-inverters and additional resonators produces three poles in the reflection characteristics, verifying the proposed system operates as a three-stage BPF. A broadwidth of the powersupply frequency is realized. With a 2 W power input in the 117-122 MHz band, the bandwidth was broadened from approximately 0.6 to 2.0 MHz, which is approximately thrice the bandwidth of the previous system.INDEX TERMS cavity resonators, wireless power transmission, wireless sensor networks, band-pass filters.

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“…Since the announcement of magnetic resonance-type wireless power transfer (WPT) by the MIT group in 2007 [1,2] , in addition to the magnetic resonance method, the electric resonance and radiation methods (microwave, laser) are also being actively researched [3][4][5][6][7][8][9][10][11][12][13][14][15][16][17]. In recent years, WPT with a relatively large separation distance and efficient transmission methods have been proposed [18][19][20][21][22][23][24][25][26] ; however, power is still being transmitted via a single power transmission device. The predominant one-to-one transmission method is to receive electromagnetic waves with a power receiving device and then use them as electric power.…”

Section: Introductionmentioning

confidence: 99%

Demonstration of wireless power coloring

Motoyama

Umeno

2021

IEICE Electron. Express

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This letter aims to demonstrate the concept of wireless power coloring (WPC), i.e., frequency division multiplexing of wireless power transfer (WPT). Currently, to obtain significant received power in WPT, the power is generated from a single transmission source. Herein, we propose a method of transmitting wireless power through more than one (N ≧ 2) multiplexed coloring source. To achieve this, we use power transmitting sources with different resonance frequencies in magnetic resonance-type WPT to selectively send power to a designated receiver.

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Improvement in Power Transmission Efficiency for Cavity Resonance-Enabled Wireless Power Transfer by Utilizing Probes With Variable Reactance

Cited by 11 publications

References 23 publications

Deep Learning Optimization of Microgrid Economic Dispatch and Wireless Power Transmission Using Blockchain

Deep Learning Optimization of Microgrid Economic Dispatch and Wireless Power Transmission Using Blockchain

System Design of Cavity Resonance-Enabled Wireless Power Transfer Based on Filter Design Theory

Demonstration of wireless power coloring

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