Wireless Power Transfer Receiver With Adjustable Coil Output Voltage for Multiple Receivers Application

Ahn, Do-Seob; Kim, Seong–Min; Kim, Sangwon; Moon, Jung‐Ick; Cho, In‐Kui

doi:10.1109/tie.2018.2833024

Cited by 25 publications

(10 citation statements)

References 27 publications

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“…This method can be used in single-powerinduced energy field for WPT systems. In [32], a novel receiver consists of two parallel coils in front of rectifier was designed to adjust the output voltage, which can avoid the occurrence of overvoltage and low voltage.…”

Section: Ac/d C Ac/d C Ac/d C Dc/a C Dc/a Cmentioning

confidence: 99%

Omnidirectional Free-Degree Wireless Power Transfer System Based on Magnetic Dipole Coils for Multiple Receivers

Chen

Liu

et al. 2021

IEEE Access

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Wireless power transfer (WPT) technology offers a potential solution for the energy-supply problem. In this paper, we propose a novel magnetic coupling mechanism for omnidirectional and multiplepickup energy transfer based on the magnetic dipole coils. Firstly, a cubic transmitter structure capable of generating three-dimension (3D) homogeneous magnetic field is fabricated to weaken directional sensitivity of receiving coil. Furthermore, the direction of current flowing through each dipole coil is also studied in detail. Numerical and simulated analysis is implemented to verify the omnidirectionality of the transmitter. Secondly, the equivalent circuit model for WPT systems with ferrite is analyzed. In addition, optimal loads, power distribution and transfer efficiency for multiple receivers are discussed and used to achieve the proper system design. Finally, experimental prototype is set up to validate the transmission performance of the proposed WPT system. The results have showed that genuine 3D high degree of freedom (DoF) can be achieved. Meantime, above 60% efficiency at least 30 W of total output power can be obtained for WPT systems with eight pick-ups. We believe the proposed system will give a new guideline for future low power electronic applications, such as monitoring sensors, miniature robots and household devices.

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Section: Ac/d C Ac/d C Ac/d C Dc/a C Dc/a Cmentioning

confidence: 99%

Omnidirectional Free-Degree Wireless Power Transfer System Based on Magnetic Dipole Coils for Multiple Receivers

Chen

Liu

et al. 2021

IEEE Access

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“…In order to meet the wireless power supply demand for the multi-load scenario, a few studies have been conducted. Firstly, increasing the area of transmitting coils is a simple method to provide power to multiple loads, but a single transmitting coil limits the spatial freedom of the receiving coils [7,8]. In [9], the energy is transmitted to multiple receivers by constructing a transmitting coil array to increase the spatial freedom of the receiving coils, while the mutual inductance between transmitting coils will reduce the efficiency of the system.…”

Section: Introductionmentioning

confidence: 99%

Parity–Time Symmetric Model and Analysis for Stable Multi-Load Wireless Power Transfer

Zhu

Yuan

Zhang

et al. 2021

WEVJ

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A noticeable challenge for a multi-load wireless power transfer system is to achieve stable power transfer under a dynamic change in coupling conditions. It was proposed that the parity–time symmetric wireless power transfer (PT-WPT) system can achieve stable output efficiency for a single receiver when tuned at the purely real eigenfrequency. However, in the case of higher order, PT symmetric systems usually cannot maintain the real eigenfrequency. To address the issue, a high-order PT-WPT model was established using coupled mode theory (CMT) theory in this paper, and the eigenfrequency of the multi-load PT-WPT system was analyzed. Here, we propose that, theoretically, the system can work at the purely real eigenfrequency by impedance matching. The transfer efficiency of the multi-load PT-WPT system when the system works at the real eigenfrequency was analyzed. The results of the numerical simulation show that the multi load PT-WPT system can maintain stable output efficiency under a dynamic change in coupling conditions. In the long run, our work provides a new possibility for the stable transmission of the multi-load wireless power transfer system.

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“…As per schemes using a Single Transmitter and Multiple Receivers (SIMO), they are adopted to recharge multiple devices with a single transmitter [13][14][15][16][17][18][19][20][21][22][23][24][25][26][27][28]. In [20] the use of a multiple-output scheme is suggested for the recharge of electric vehicles.…”

Section: Introductionmentioning

confidence: 99%

“…In fact, the optimal loads are obtained by solving the eigenvalue problem expressed in (23). To solve the eigenvalue problem one just needs the matrices A and B that can be directly computed from the Z matrix, see (18) and (19).…”

mentioning

confidence: 99%

Optimal Terminations for a Single-Input Multiple-Output Resonant Inductive WPT Link

et al. 2020

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This paper analyzes a resonant inductive wireless power transfer link using a single transmitter and multiple receivers. The link is described as an (N+1)–port network and the problem of efficiency maximization is formulated as a generalized eigenvalue problem. It is shown that the desired solution can be derived through simple algebraic operations on the impedance matrix of the link. The analytical expressions of the loads and the generator impedances that maximize the efficiency are derived and discussed. It is demonstrated that the maximum realizable efficiency of the link does not depend on the coupling among the receivers that can be always compensated. Circuital simulation results validating the presented theory are reported and discussed.

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Wireless Power Transfer Receiver With Adjustable Coil Output Voltage for Multiple Receivers Application

Cited by 25 publications

References 27 publications

Omnidirectional Free-Degree Wireless Power Transfer System Based on Magnetic Dipole Coils for Multiple Receivers

Omnidirectional Free-Degree Wireless Power Transfer System Based on Magnetic Dipole Coils for Multiple Receivers

Parity–Time Symmetric Model and Analysis for Stable Multi-Load Wireless Power Transfer

Optimal Terminations for a Single-Input Multiple-Output Resonant Inductive WPT Link

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