Wireless power domino-resonator systems with noncoaxial axes and circular structures

Zhong, Wenxing; Lee, Chi Kwan; Hui, S. Y. Ron

doi:10.1109/tpel.2011.2174655

Cited by 153 publications

(64 citation statements)

References 19 publications

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“…Table 2 summarizes most probable combinations of circular coils with rectangular cross sections (e.g., disk coils, thin wall solenoids, filamentary, etc.) engineers may have in designing [15][16][17][18][19][20][21][22][23][24].…”

Section: Calculation Methodsmentioning

confidence: 99%

“…With the general formula for two filamentary inclined coils [6], we cover uniquely all inclined coils either with rectangular cross section or inclined coils with negligible cross section. The presented approach can be successfully used in applications such as transcutaneous energy transfer for medical implants, wireless power transfer through human skin based on the resonant techniques, inductive power pickup systems, RFID technology, PEEC modeling, magnetically controllable devices and sensors, wireless charging pads for portable electronic products such as mobile phones and iPods [14][15][16][17][18][19][20][21][22][23][24].…”

Section: Introductionmentioning

confidence: 99%

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Mutual Inductance Calculation Between Misalignment Coils for Wireless Power Transfer of Energy

Babić¹,

Martı́nez²,

Akyel³

et al. 2014

PIER M

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Abstract-In this paper we present a detailed theoretical analysis of lateral and angular misalignment effects in RF coils. Radio-frequency (RF) coils are used extensively in the design of implantable devices for transdermal power and data transmission. A design procedure is established to maximize coil coupling for a given configuration to reduce the effects of misalignment on transmission efficiency. Formulas are derived for the mutual inductance between all possible coil configurations including the coils of cross section, thin solenoids, pancakes and filamentary circular coils whose axes are laterally and angularly displaced. Coils are in air. In this approach we used the filament method and the mutual inductance between filamentary circular coils placed in any desired position. We completely describe all mathematical procedures to define coil positions that lead to relatively easy method for calculating the mutual inductance between previously mentioned coils. The practical coils in implantable devices fall into two categories: disk coils (pancakes) and solenoid coils. From the general approach for calculating the mutual inductance between coils of rectangular cross section with lateral and angular misalignments the mutual inductance between misalignment solenoids and disks will be calculated easily and accurately.

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Section: Calculation Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Mutual Inductance Calculation Between Misalignment Coils for Wireless Power Transfer of Energy

Babić¹,

Martı́nez²,

Akyel³

et al. 2014

PIER M

View full text Add to dashboard Cite

show abstract

“…To date, scholars have done the following research on these issues: 1) Limited transfer distance: The energy transfer efficiency is decreased sharply while distance increases. At present, designers often increase the system frequency to alleviate this contradiction [12].…”

Section: Introductionmentioning

confidence: 99%

A bidirectional wireless power transfer system for an electric vehicle with a relay circuit

Xia¹,

Wang²,

Liu³

et al. 2017

Turk J Elec Eng & Comp Sci

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Abstract:In order to extend the transfer distance, enhance the tolerance for coil misalignment, and improve the capability of energy feedback and power transfer efficiency of conventional wireless power transfer (WPT) systems for electric vehicles, this paper presents a bidirectional WPT topology with a relay circuit. In the proposed topology, the primary and pickup circuits are implemented with virtually identical structures, which can operate in both magnetic field excitation and magnetic field receiving modes to facilitate bidirectional power flow between the primary side and the pickup side. A relay circuit is introduced to achieve high transfer efficiency under special conditions such as long distance or coil misalignment. The mathematical model of the system is established to describe its working mechanism in detail. Both the direction and amount of power flow can be regulated by controlling the shift phase voltages generated by primary and pickup switches. At the same time, the power and efficiency of system are analyzed, which provides a reference to optimize the parameters. The viability of the proposed system is verified by experiments, and the results suggest that the relay bidirectional WPT system is a reliable and efficient system for electric vehicle charging systems.

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“…The receiving coil and transmission coil realize the non-contact transmission via electromagnetic field, electromagnetic conversion efficiency is lower while the transmission distance increases, and IPT technology is generally applied to the wireless power transmission [8].…”

Section: Introductionmentioning

confidence: 99%

Research of Magnetic Coupler Array for IPT System

Hu¹,

Sun²,

Wang³

et al. 2013

EPE

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The advance of Inducive Power Transfer (IPT) system is capable to transfer large power across an air gap of sufficient distance, but the power level and charging area of receiver are limited by the magnetic coupler of IPT system. This paper analyses the correlative factors which effect maximum output power (P m ), it reveals P m is inversely proportional with magnetic flux of power receiving coils. New ferrite array structure is proposed as the basic part of magnetic coupler that focusing on enhancing the equilibrium of magnetic flux distribution at charging area and increasing power transfer distance. The method of winding on ferrite array is quite flexible and the power transmission distance can be increased by changing the mode of ferrite array windings while magnetic field uniform is reduced, users can chose the suitable mode of winding for different IPT system. Finally the validity of theory analysis is tested by a 3D finite element modeling tool.

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Wireless power domino-resonator systems with noncoaxial axes and circular structures

Cited by 153 publications

References 19 publications

Mutual Inductance Calculation Between Misalignment Coils for Wireless Power Transfer of Energy

Mutual Inductance Calculation Between Misalignment Coils for Wireless Power Transfer of Energy

A bidirectional wireless power transfer system for an electric vehicle with a relay circuit

Research of Magnetic Coupler Array for IPT System

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