Two- and Three-Dimensional Omnidirectional Wireless Power Transfer

Ng, Wai Man; Zhang, Cheng; Lin, D.; Hui, S. Y. Ron

doi:10.1109/tpel.2014.2300866

Cited by 187 publications

(78 citation statements)

References 9 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…While most of the previous works focus on directional WPT, the idea of using orthogonal coils for omnidirectional WPT is addressed in [16], which highlights the point that identical currents in the orthogonal coils will not lead to true omni-directional WPT. This point is also confirmed with experiments in [17]. Recent advancements in the control principles of true omni-directional WPT have been reported in [18].…”

Section: Introductionsupporting

confidence: 79%

“…This kind of rotating magnetic field will ensure that the load at any direction on the 2-D plane can pick up power [17,18]. It is the simplest form of a 2-D omni-directional wireless power transfer system, although it is not necessarily the most efficient way to power the load, especially when there is only one load in the plain.…”

Section: Theoretical Analysis Of Two-dimensional Omni-directionalmentioning

confidence: 99%

See 1 more Smart Citation

Power and efficiency of 2-D omni-directional wireless power transfer systems

Lin

Zhang

Hui

2015

2015 IEEE Energy Conversion Congress and Exposition (ECCE)

Self Cite

View full text Add to dashboard Cite

This paper presents a mathematical analysis on 2-dimensional omni-directional wireless power transfer. It is shown that with the use of current control in the transmitter coils, magnetic field vector can be generated to point at all directions in a 2-dimensional sense. The theory allows the equations of the total input power and output power of the system to be determined at all angles of input magnetic field vector. Mechanisms for determining the load positions and directing wireless power them efficiently are proposed and practically realized. The theory has been verified with practical measurements.

show abstract

Section: Introductionsupporting

confidence: 79%

Section: Theoretical Analysis Of Two-dimensional Omni-directionalmentioning

confidence: 99%

Power and efficiency of 2-D omni-directional wireless power transfer systems

Lin

Zhang

Hui

2015

2015 IEEE Energy Conversion Congress and Exposition (ECCE)

Self Cite

View full text Add to dashboard Cite

show abstract

“…The three-dimensional Tx coil structure is investigated for the maximum power transfer to single dynamic Rx irrespective of the orientation [21,22]. However, the uniform power distribution to multiple Rx with three-dimensional structure is difficult to control and requires additional control circuitry at the Tx coil.…”

Section: Introductionmentioning

confidence: 99%

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

et al. 2018

View full text Add to dashboard Cite

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.

show abstract

“…This structure consists of crossed split-ring resonators. If it were to be simplified, the transmitter coils of the WPT system can be constructed orthogonally [5]. The two closed loops then cross each other.…”

Section: Introductionmentioning

confidence: 99%

Omnidirectional Resonator in X-Y Plane Using a Crisscross Structure for Wireless Power Transfer

Kim¹,

Seo²

2015

Journal of electromagnetic engineering and science

View full text Add to dashboard Cite

Magnetic resonant coupling is more efficient than inductive coupling for transferring power wirelessly over a distance. However, a conventional resonant wireless power transfer (WPT) system requires a transmitter and receiver pair in exactly coaxial positions. We propose a resonator that can serve as an omnidirectional WPT system. A magnetic field will be generated by the current flowed through the transmitter. This magnetic field radiates omnidirectionally in the x-y plane because of the crisscross structure characteristic of the transmitter. The proposed resonator is demonstrated by using a single port. To check the received S21 and transfer efficiency, we moved the receiver around the transmitter at different distances (50-350 mm). As a result, the transmission efficiency is found to be 48%-54% at 200 mm.

show abstract

Two- and Three-Dimensional Omnidirectional Wireless Power Transfer

Cited by 187 publications

References 9 publications

Power and efficiency of 2-D omni-directional wireless power transfer systems

Power and efficiency of 2-D omni-directional wireless power transfer systems

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

Omnidirectional Resonator in X-Y Plane Using a Crisscross Structure for Wireless Power Transfer

Contact Info

Product

Resources

About