Load-Isolation Wireless Power Transfer With K-Inverter for Multiple-Receiver Applications

Kuang, Jiwei; Luo, Bin; Zhang, Yanling; Hu, Yao

doi:10.1109/access.2018.2824334

Cited by 22 publications

(15 citation statements)

References 31 publications

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“…This approach offers more user-friendliness, may also charge 1 to 3 smartphones [4]. The SIMO is also used for Maglev train with the series compensation on the primary side [130]; for the bidirectional Vehicle-To-Grid (V2G) systems multilevel IPT converters with 3 coils LCL compensation [131] and the load-isolation WPT with the 3-coil SSS compensation [132].…”

Section: B Compensation In Multiply Input and Output Systems Multicmentioning

confidence: 99%

Compensation Topologies in IPT Systems: Standards, Requirements, Classification, Analysis, Comparison and Application

et al. 2019

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Wireless power transfer devices are becoming more relevant and widespread. Therefore, an article is devoted to a review, analysis and comparison of compensation topologies for an inductive power transfer. A new classification of topologies is developed. A lot of attention is paid to the problems of the physical fundamentals of compensation work, standards, safety, and five main topology requirements. It is determined, that topologies with the series primary compensating are the most effective in the IPT for charging devices among the four classical schemes. The series-parallel solution is recommended in case of the low output voltage, minimum size of a secondary side coil is achievable. The series-series solution does not depend on the magnetic coupling coefficient and the load on the resonance frequency. For the convenience of displaying and understanding the information, the comparison results are listed in the tables, graphs and dependencies. The main suitable topologies for a certain application are defined. The given conclusions provide a ''one-stop'' information source and a selection guide on the application of compensation topologies both in terms of devices and in terms of power level that is the main value of this paper. During literature analysis and recent trends in the market for wireless power transmission devices, the main possible further ways of developing topologies are underlined. First of all, it concerns increasing the frequency of resonance of compensation topologies, the use of multilevel / multi-pulse / multicoils structures, the study of existing high-frequency semiconductors and the development of the semiconductor and magnetic materials.

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Section: B Compensation In Multiply Input and Output Systems Multicmentioning

confidence: 99%

Compensation Topologies in IPT Systems: Standards, Requirements, Classification, Analysis, Comparison and Application

et al. 2019

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“…To simplify the calculation, L ei , C ei (i ¼ 1; 2; 3) was used to represent the parameters of the impedance inverter at Rxi. According to [19,20,21], impedance inverter can be implemented with one inductor and two capacitors, and K ei is the characteristic impedance of the inverter, where 1; 2; 3). The equivalent impedance R Li 0 can be expressed as…”

Section: Theoretical Analysis Of System Circuitsmentioning

confidence: 99%

“…As the conventional single-transmitting (Tx) and single-receiving (Rx) circuits cannot fulfil the requirement of simultaneously providing power for multiple electrical devices in practical applications, the study on multi-Rx coils has made great progress in recent years [7,8,9,10,11,12,13,14,15,16,17,18,19,20,21]. For multi-Rx coil systems, the cross-coupling between the coils cannot be ignored when Rx coils are very close to each other.…”

Section: Introductionmentioning

confidence: 99%

“…However, the parameters of impedance inverter were affected by other Rxs. Unlike most multi-Rx WPT systems [7,8,9,10,11,12,13,14,15,16,17,18,19,20,21], this study proposed WPT system that eliminates the energy multipath effect and distinguishes the multiple Rxs to realize one-toone transmission energy in single-frequency, which helps to achieve selective target power distribution. The proposed system can be used in battery charging applications to increase system efficiency, because it can prevent the power supply to fully charged devices by selectively not transmitting power to the target receiver [16].…”

Section: Introductionmentioning

confidence: 99%

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Multiple receivers wireless power transfer systems using decoupling coils to eliminate cross-coupling and achieve selective target power distribution

Zhuo

Luo

Zhang

et al. 2019

IEICE Electron. Express

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Current research in selectively supplying power to multi-receiving coil by each means has advantages and disadvantages. In response, the authors designed a more efficient selective power transmission and power allocation method. Multiple different specifications coaxial decoupling coils as the receiving coils. And the transmitting coils of the same specification as the receiving coils are integrally arranged on the same axis. Since the cross-coupling between the receiver coils can be eliminated. Therefore, excite the transmit coil can selectively supply power to the same specification receiver coil. And the load power can be designed by the impedance inverter of the receiving coil.

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“…For systems operating at a predetermined frequency, the authors in [33] have utilized the transmitting resonator to realize load-independent constant voltages. Unfortunately, in both the methods in [32] and [33], the ratio of the output voltages is fixed by the arrangement of the transmitting and receiving resonators, making these methods ineffective in controlling the individual voltages to reach the rated values. To the best of our knowledge, a multiple-receiver IPT system which can control and, at the same time, stabilize the output voltages has not been proposed so far.…”

Section: B Related Workmentioning

confidence: 99%

Load-Independent Voltage Control for Multiple-Receiver Inductive Power Transfer Systems

Duong

Okada

2019

IEEE Access

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This paper proposes a multiple-receiver inductive power transfer platform which is capable of controlling the load voltages to satisfy individually rated values and stabilizing the load voltages against the load variations. In the proposed charging platform, multiple transmitting resonators are employed to support a voltage-driven source resonator in manipulating the energy flows toward individual receivers. This structure also helps the voltage source induce constant currents into the transmitting resonators, and therefore, is able to deliver load-independent voltages to the loads. As a result, when the loads are sufficiently large, the load voltage ratio is approximately determined only by the mutual couplings of the coils. This means that the voltage control can be performed by effortlessly adjusting the arrangement of the transmitting resonators inside the charging platform. Electromagnetic simulation and experiment results verify voltage stability and controllability of the proposed system. Although typical constant voltage designs inevitably suffer from efficiency degradation, our scheme can achieve an efficiency of up to 56%, which is acceptable and sufficient for many practical applications.INDEX TERMS Inductive power transfer, load-independent, multiple receivers, voltage control.

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Load-Isolation Wireless Power Transfer With K-Inverter for Multiple-Receiver Applications

Cited by 22 publications

References 31 publications

Compensation Topologies in IPT Systems: Standards, Requirements, Classification, Analysis, Comparison and Application

Compensation Topologies in IPT Systems: Standards, Requirements, Classification, Analysis, Comparison and Application

Multiple receivers wireless power transfer systems using decoupling coils to eliminate cross-coupling and achieve selective target power distribution

Load-Independent Voltage Control for Multiple-Receiver Inductive Power Transfer Systems

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