Wireless power transfer for free positioning using compact planar multiple self-resonators

Kim, Jin Wook; Son, Hyeon-Chang; Kim, Do-Hyeon; Yang, Jong‐Ryul; Kim, Kwan-Ho; Lee, Kimin; Park, Youngjin

doi:10.1109/imws.2012.6215789

Cited by 27 publications

(17 citation statements)

References 10 publications

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“…The coil between the excitation point and the receiving point serves as a relay coil. This system is reported to have a technical problem regarding significant reductions in power transfer efficiency at the overlaps as shown in Figure 1(b) (3) . Fig.…”

Section: Cpts For Charging Moving Evsmentioning

confidence: 99%

Proposed Dynamic Contactless Power Transfer System

Yasuda¹,

Fujita²,

Sato³

2015

WEVJ

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Since EV has the subject that a vehicles price with the long charging time with short mileage is high, it has not resulted in full-scale spread. The dynamic contactless power transfer system which performs an electric power supply on the vehicles under drive is expected as a means to solve the subject of EV.There are some problems resulting from the loop coil being used for the dynamic contactless power transfer system. The first problem is that it is incompatible with the stationary contactless power transfer system.In the stationary contactless power transfer system, since the ground coil of a different type from a loop coil is adopted, the vehicles must install two coils, under parking and driving. The space reservation for installing a coil by passenger car is difficult, and is not practical. The second problem is that the leakage flux and the radiation noise become large. The third problem is that a construction period and a repair period become long. In this paper, the dynamic contactless power transfer system which has the following features is proposed and a simulation and an experimental result show the validity. The feature of the system to propose is as follows. The ground coil of a proposal system is the same as that of the stationary contactless power transfer system, and electric supply becomes possible also while parking also driving.The proposal system consists of same ground side coil as the stationary contactless power transfer system, and a vehicles side coil, and leakage flux and a radiation noise are small. Since a proposal system vacates an interval and installs a ground coil, construction period shortening and price reduction of a system of it are attained.

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Section: Cpts For Charging Moving Evsmentioning

confidence: 99%

Proposed Dynamic Contactless Power Transfer System

Yasuda¹,

Fujita²,

Sato³

2015

WEVJ

View full text Add to dashboard Cite

show abstract

“…WPT Systems proposed in [29][30][31] consist of one source coil, multiple self-resonators and one load coil. A WPT system with four resonant coils is presented in [29], which is designed and implemented for the power supply of micro-implantable medical sensors.…”

Section: Introductionmentioning

confidence: 99%

“…A WPT system with four resonant coils is presented in [29], which is designed and implemented for the power supply of micro-implantable medical sensors. The system proposed in [30] consists of a transmitter with five self-resonators and a receiver with a self-resonator which supports free positioning in a large area. An optimal design method in an asymmetric wireless power transfer system for a 150 watt LED TV is discussed in [31] where the system consists of three self-resonators: a Tx resonator, an Rx resonator, and an intermediate resonator.…”

Section: Introductionmentioning

confidence: 99%

A Novel WPT System Based on Dual Transmitters and Dual Receivers for High Power Applications: Analysis, Design and Implementation

Mai

Lin

et al. 2017

Energies

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Traditional Wireless Power Transfer (WPT) systems only have one energy transmission path, which can hardly meet the power demand for high power applications, e.g., railway applications (electric trains and trams, etc.) due to the capacity constraints of power electronic devices. A novel WPT system based on dual transmitters and dual receivers is proposed in this paper to upgrade the power capacity of the WPT system. The reliability and availability of the proposed WPT system can be dramatically improved due to the four energy transmission paths. A three-dimensional finite element analysis (FEA) tool ANSYS MAXWELL (ANSYS, Canonsburg, PA, USA) is adopted to investigate the proposed magnetic coupling structure. Besides, the effects of the crossing coupling mutual inductances among the transmitters and receivers are analyzed. It shows that the same-side cross couplings will decrease the efficiency and transmitted power. Decoupling transformers are employed to mitigate the effects of the same-side cross couplings. Meanwhile, the output voltage in the secondary side can be regulated at its designed value with a fast response performance, and the system can continue work even with a faulty inverter. Finally, a scale-down experimental setup is provided to verify the proposed approach. The experimental results indicate that the proposed method could improve the transmitted power capacity, overall efficiency and reliability, simultaneously. The proposed WPT structure is a potential alternative for high power applications.

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“…The car is then charged while moving on the road. However dead zones exist in certain positions where the power do not transfer to the load [2]. Conventional equivalent circuit equations is complex due to number of coils involved [3,4] and therefore impede the understanding of the cause.…”

Section: Introductionmentioning

confidence: 99%

Analysis of Dead Zone in Wireless Power Transfer via Magnetic Resonant Coupling for Charging Moving Electric Vehicles

2015

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Wireless power transfer via magnetic resonant coupling is widely researched for various applications especially for charging electric vehicles. In order to reduce the dependency on battery capacity, charging while the vehicle is moving may be a solution. Wireless power transfer lane is constructed by embedding the coils beneath the road to provide charging coverage to certain distance. The actual system will consists of arbitrary number of coils and therefore conventional equivalent circuit analysis will be complex. In this paper, a new and simplified analysis method using impedance inverter representation and power division principle is proposed to investigate the feasibility of charging lane.

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Wireless power transfer for free positioning using compact planar multiple self-resonators

Cited by 27 publications

References 10 publications

Proposed Dynamic Contactless Power Transfer System

Proposed Dynamic Contactless Power Transfer System

A Novel WPT System Based on Dual Transmitters and Dual Receivers for High Power Applications: Analysis, Design and Implementation

Analysis of Dead Zone in Wireless Power Transfer via Magnetic Resonant Coupling for Charging Moving Electric Vehicles

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