A High-Efficiency and Long-Distance Power-Relay System With Equal Power Distribution

Lu, Fei; Zhang, Hua; Li, Weiguo; Zhou, Zhe; Zhu, Chong; Cheng, Chenwen; Deng, Zhanfeng; Chen, Xi; Mi, Chris

doi:10.1109/jestpe.2019.2898125

Cited by 43 publications

(20 citation statements)

References 28 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…2 c ), such a structure uses parallel transmitter resonators, and is identified as the parallel array [37, 38]. Today, the majority of power arrays of resonators are based on: (i) conventional floating resonators [39–42]; (ii) parallel switching multi‐transmitter coil approaches [43–50]; and just recently, (iii) parallel inductive arrays were introduced as an enhanced solution.…”

Section: Introductionmentioning

confidence: 99%

Multi‐resonator arrays for smart wireless power distribution: comparison with experimental assessment

Mirbozorgi

Maghsoudloo²,

Bahrami³

et al. 2020

IET power electron.

View full text Add to dashboard Cite

This study presents the design of efficient wireless power distribution systems based on resonant inductive arrays. The authors show how to use multi‐resonator arrays to charge and power up several electric devices in parallel, with nearly constant transmitted power, and using a single power source. Their single‐source wireless power transmission clusters, for instance, are shown to provide free positioning at better power efficiency than previous solutions. They provide analysis, simulation, and measurement performance of their multi‐resonator arrays, they compare them with other types of inductive arrays employed into different schemes (multi‐coil inductive links, overlapping and non‐overlapping links), and they show the advantage of their strategy over previous solutions. The presented wireless power distribution systems improve power transmission efficiency (PTE) in free positioning by as much as 30%. The measured results show that their multi‐resonator arrays present significant advantages: (i) they allow multiple charging zones from a single power source; (ii) they provide free positioning with strictly uniform power delivered to the load; and (iii) they provide superior efficiency through a built‐in power localization mechanism, which is not available in other solutions. The PTE of the multi‐resonator array in single‐receiver and multi‐receiver configurations outperformed previous solutions by 26% and 12%, respectively.

show abstract

Section: Introductionmentioning

confidence: 99%

Multi‐resonator arrays for smart wireless power distribution: comparison with experimental assessment

Mirbozorgi

Maghsoudloo²,

Bahrami³

et al. 2020

IET power electron.

View full text Add to dashboard Cite

show abstract

“…However, in most of the existing WPT systems, usually, only one load is powered via the magnetic or electric field [6][7][8][9]. Recently, more and more publications investigated the WPT system with multiple loads [10][11][12][13][14][15][16][17][18]. In [10], a WPT system with two receivers (Rxs) was designed, where the two receiving coils are decoupled by adjusting the winding direction of turns.…”

Section: Introductionmentioning

confidence: 99%

“…The repeater coil structure [14, 15] could be a good solution because the coils can not only increase the power transfer distance but also be connected to multiple loads. In [16], the repeater coils were adopted to power multiple loads. Each repeater coil was connected with a load.…”

Section: Introductionmentioning

confidence: 99%

“…The repeater coils that function as power repeaters enable the long‐distance power transfer by enhancing the magnetic field along the power transfer route. However, it was concluded in [16] that the load power was coupled with each other, which means when changing one load power, the other load power would also vary. In [17, 18], the multi‐load WPT systems were presented also using repeater coils.…”

Section: Introductionmentioning

confidence: 99%

“…In [17, 18], the multi‐load WPT systems were presented also using repeater coils. Different from [16], every two repeater coils formed a repeater unit and each repeater unit was connected to a load. With a suitable compensation topology, the constant load current can be obtained for each load when neglecting the coil's resistance.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Repeater coil‐based wireless power transfer system powering multiple gate drivers of series‐connected IGBTs

Cheng¹,

Wang

Zhou

et al. 2020

IET Power Electronics

Self Cite

View full text Add to dashboard Cite

It is challenging to power a large number of gate drivers of the series-connected insulated gate bipolar transistors (IGBTs) in a high-voltage application because multiple isolated power supplies are needed. In this study, a novel wireless power transfer (WPT) system using repeater coils is designed to solve this problem. Every two repeater coils form a repeater unit, which transfers power to one load. With multiple repeater units in the system, multiple loads can obtain power simultaneously. To eliminate undesirable magnetic couplings between these coils, bipolar coils are used and the two bipolar coils in the same repeater unit are placed perpendicularly. It is derived that constant voltage can be obtained for all the loads, which is especially suitable for powering the IGBT's gate driver. Moreover, the variation of one load power will not affect others. The receiving circuit is designed to transform the received power to the DC voltage compatible with the driving circuits. An experimental setup with six loads has been constructed to validate the proposed WPT system.

show abstract

Flexible design method for multiple loads inductive power transfer system with equal power distribution

Wang

Qian

Cui

et al. 2022

Circuit Theory & Apps

View full text Add to dashboard Cite

An inductive power transfer (IPT) system for powering multiple sensor nodes placed at various distances is proposed, in which the relay coil not only performs as a power relay to enhance the magnetic field along the power transfer route but also supplies energy to the local load. Based on Kirchhoff's law, the equivalent circuit model of the multi-load IPT system is established, and the relationship between power distribution and mutual inductance of adjacent coils is investigated. Aiming at practical applications, a flexible design method for the adjacent coil distance is proposed to adjust the mutual inductance and regulate the power distribution. Experimental results show that the equal power distribution is achieved for five loads across a transfer distance of 60.9 cm. Each load dissipates about 0.78 W with a power variation within 6.3%. The results indicate the feasibility of the proposed design method in the multiple-load wireless sensor network (WSN) applications.

show abstract

A High-Efficiency and Long-Distance Power-Relay System With Equal Power Distribution

Cited by 43 publications

References 28 publications

Multi‐resonator arrays for smart wireless power distribution: comparison with experimental assessment

Multi‐resonator arrays for smart wireless power distribution: comparison with experimental assessment

Repeater coil‐based wireless power transfer system powering multiple gate drivers of series‐connected IGBTs

Flexible design method for multiple loads inductive power transfer system with equal power distribution

Contact Info

Product

Resources

About