Basic Control Principles of Omni-Directional Wireless Power Transfer

Zhang, Cheng; Lin, D.; Hui, S. Y. Ron

doi:10.1109/tpel.2015.2479246

Cited by 95 publications

(59 citation statements)

References 10 publications

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“…In order to heighten transmission distance with power delivered to the load (PDL), multi-repeater WPT systems have been proposed [5][6][7][8]. The practical application of a single charging platform supplying power to multiple devices attracts a great deal of attention [9][10][11], and some approaches using multiple TXs to transfer more power to a single RX have been studied in [12][13][14].…”

Section: Introductionmentioning

confidence: 99%

Enhanced Power Transmission for on-Road Agv Wireless Charging Systems Using a Current-Optimized Technique

Jin¹,

Chen²,

Zhang³

2019

PIER C

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This paper provides a sound wireless power transfer (WPT) recharging solution for onroad automated guided vehicle (AGV) system. In this solution, multiple transmitting coils serve as power transmitters (TXs), and a receiving coil in AGV serves as a power receiver (RX). The multiple TXs are along a straight track for dynamic charging to AGV. The circuit model of multiple-TX and single-RX WPT system is first constructed based on circuit theory (CT), and then current-optimized scheme based on Lagrangian multiplier method is proposed to tune the currents in multiple TXs to maximize the power delivered to the load (PDL). The equal current (EC Case) flowing through each TX is compared with the optimal current (OC Case). Through contrastive analysis, the OC Case shows its advantages in PDL. Finally, the theoretical analysis results are confirmed by the results of full-wave electromagnetic simulation.

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Section: Introductionmentioning

confidence: 99%

Enhanced Power Transmission for on-Road Agv Wireless Charging Systems Using a Current-Optimized Technique

Jin¹,

Chen²,

Zhang³

2019

PIER C

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“…Hence, some free-positioning and omnidirectional wireless charging systems and related control methods have been proposed [4][5][6][7][8][9][10][11]. On the basis of the spherical two-or three-dimensional Tx coil, some control methods, such as current vector control, nonidentical current control, and current amplitude control, were proposed to achieve omnidirectional WPT [4][5][6]. However, the external measuring and feedback control loop, which are necessary for the control system, are usually expensive and make the systems more complex.…”

Section: Introductionmentioning

confidence: 99%

A Compact Spatial Free-Positioning Wireless Charging System for Consumer Electronics Using a Three-Dimensional Transmitting Coil

et al. 2019

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A compact spatial free-positioning wireless charging system with a novel three-dimensional (3D) transmitting (Tx) coil is proposed to charge consumer electronics in the working area. Because of the strengthened electromagnetic field generated by the proposed 3D Tx coil in the space, this system can charge consumer electronics wirelessly with great tolerance to positional and angular misalignments between the transmitter and receiver. Benefiting from the compact design of the 3D Tx coil, the system can be easily embedded in some corners of office furniture/cubic panels, which will not cause any extra working space consumption when charging devices. The inductor-capacitor-capacitor (LCC) compensation circuit on the Tx side can achieve constant current output, which is independent of load condition and can protect the transmitter. With the LCC compensation circuit, the MOSFETs of the H-bridge high-frequency inverter realized zero voltage switching (ZVS). The small-sized planar receiving (Rx) coil and series (S) compensation circuit is applied to achieve compact receiver design. The theoretical and experimental results show that the spatial free-positioning wireless charging prototype can transfer 5 W to the small-sized receiver in around 350 mm × 225 mm × 200 mm 3D charging area and achieve the highest efficiency of 77.9%.

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“…Some studies utilized decoupling coils to eliminate the mutual inductance between coils, and the major decoupling methods include: i) insert a metal insulator between the coils [22]; ii) adjust the coils position (e.g., overlap and orthogonal) and make the net magnetic flux between the coils to be zero [23,24,25]; iii) use different structures of coils (e.g., unipolar coil and bipolar coil) to eliminate the magnetic flux between the coils [26,27,28,29,30,31]. The existing studies have not used the decoupling coil as a separate Rx in the WPT system.…”

Section: Introductionmentioning

confidence: 99%

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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Basic Control Principles of Omni-Directional Wireless Power Transfer

Cited by 95 publications

References 10 publications

Enhanced Power Transmission for on-Road Agv Wireless Charging Systems Using a Current-Optimized Technique

Enhanced Power Transmission for on-Road Agv Wireless Charging Systems Using a Current-Optimized Technique

A Compact Spatial Free-Positioning Wireless Charging System for Consumer Electronics Using a Three-Dimensional Transmitting Coil

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

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