A Comprehensive Study on Composite Resonant Circuit-Based Wireless Power Transfer Systems

Summary To eliminate frequency splitting in wireless power transfer, a novel spindle‐shaped coil‐based wireless power transfer system is introduced and designed. Based on the equivalent circuit model, the transmission coefficient and the input impedance are calculated. A comparative analysis is performed between the traditional and the proposed systems. It is found that the frequency splitting is suppressed by utilizing spindle‐shaped transmitting and receiving coils in the proposed system because of the larger mutual inductance between the source coil (load coil) and transmitting coil (receiving coil) and the smaller mutual inductance between the transmitting and the receiving coils in comparison with the traditional system. In the overcoupled region, the transmission coefficient of the proposed system almost remains unchanged and keeps at a high value. The input impedance is characterized with high amplitude and small argument, which is beneficial for efficient power transfer. Experimental setup is established to validate the performance of the proposed wireless power transfer system. The results indicate that the proposed system is superior to the traditional one in eliminating the frequency splitting, which is well consistent with the simulation analysis.

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“…According to (1) and combining with V L = R L I 4 , the transmission coefficient can be rewritten in terms of the current ratio as…”

Section: Equivalent Circuit Model Of Four-coil Mr-wptmentioning

confidence: 99%

“…Recently, wireless power transfer (WPT) has been a hot research topic as it is able to deliver energy without power cord connection . Typically, the power in WPT is transferred with electromagnetic field as the medium.…”

Section: Introductionmentioning

confidence: 99%

Development of a novel spindle‐shaped coil‐based wireless power transfer system for frequency splitting elimination

Shi

Zhou

Shen

et al. 2020

Circuit Theory & Apps

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“…This article focusses mainly on operational properties of the WPT system using the inductive-resonant coupling connected in four different configurations; series-series, series-parallel, parallel-series and parallel-parallel [5][6][7][8][9] The system evaluation is based on results from numerical simulation [13][14] and from experimental measurement [10][11][12] of 5 kW WPT system prototype. As some comparative parameters we introduce the power transferred to the load and the system operational efficiency including the input inverter, resonant tank and output rectifier.…”

Section: Introductionmentioning

confidence: 99%

Comparison of Various Configuration of Wireless Power Transfer System

Zavrel

Kindl

2020

TEE

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-This article deals with mutual comparison of different resonant tank configurations of the wireless power transfer (WPT) systems. Tested compensation configurations are classified as series-series, series-parallel, parallel-series and parallel-parallel and all of them are operated with the input and output frequency converters and other supplementary electronics. As parameter we chose the transfer distance and load. The comparison is made according to changes in overall system efficiency and power delivered to the load along varying both the load and operational distance. All theoretical findings are experimentally verified and discussed in the conclusion section.

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“…Recent progress in the magnetic resonant based wireless power transfer (MRWPT) system has stimulated its usage in wide applications such as electric vehicles, consumer appliances, and wireless sensor networks [1][2][3]. Also, MRWPT technology could be the best choice for small power wearable or implanted healthcare devices, such as blood glucose monitors, hearing aids, electrocardiogram, micropumps, pacemakers and insulin pumps [4,5].…”

Section: Introductionmentioning

confidence: 99%

Frequency Splitting Elimination and Cross-Coupling Rejection of Wireless Power Transfer to Multiple Dynamic Receivers

et al. 2018

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Abstract:Simultaneous power transfer to multiple receiver (Rx) system is one of the key advantages of wireless power transfer (WPT) system using magnetic resonance. However, determining the optimal condition to uniformly transfer the power to a selected Rx at high efficiency is the challenging task under the dynamic environment. The cross-coupling and frequency splitting are the dominant issues present in the multiple Rx dynamic WPT system. The existing analysis is performed by considering any one issue present in the system; on the other hand, the cross coupling and frequency splitting issues are interrelated in dynamic Rx's, which requires a comprehensive design strategy by considering both the problems. This paper proposes an optimal design of multiple Rx WPT system, which can eliminate cross coupling, frequency splitting issues and increase the power transfer efficiency (PTE) of selected Rx. The cross-coupling rejection, uniform power transfer is performed by adding an additional relay coil and independent resonance frequency tuning with capacitive compensation to each Rx unit. The frequency splitting phenomena are eliminated using non-identical transmitter (Tx) and Rx coil structure which can maintain the coupling between the coil under the critical coupling limit. The mathematical analysis of the compensation capacitance calculation and optimal Tx coil size identification is performed for the four Rx WPT system. Finite element analysis and experimental investigation are carried out for the proposed design in static and dynamic conditions.

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A Comprehensive Study on Composite Resonant Circuit-Based Wireless Power Transfer Systems

Cited by 31 publications

References 27 publications

Development of a novel spindle‐shaped coil‐based wireless power transfer system for frequency splitting elimination

Development of a novel spindle‐shaped coil‐based wireless power transfer system for frequency splitting elimination

Comparison of Various Configuration of Wireless Power Transfer System

Frequency Splitting Elimination and Cross-Coupling Rejection of Wireless Power Transfer to Multiple Dynamic Receivers

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