Analysis and design of wireless power transfer system with an intermediate coil for high efficiency

Moon, SangCheol; Kim, Bong-Chul; Cho, Shin-Young; Moon, Gun-Woo

doi:10.1109/ecce-asia.2013.6579235

Cited by 42 publications

(48 citation statements)

References 9 publications

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“…From the proposed approach, a new optimal frequency selection process can be applied to reduce proximity effect, switching loss and conduction loss of the entire contactless converter. If the conventional approach is carried out for the similar kind of transformer, primary conduction loss and switching loss of the system can increase significantly because of the inappropriate selection of the switching frequency [26].…”

Section: -Selection Of the Capacitance Parametersmentioning

confidence: 99%

Wide-Air-Gap Transformer Model for the Design-Oriented Analysis of Contactless Power Converters

Thenathayalan

Park

2015

IEEE Trans. Ind. Electron.

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Wireless power converter topology with small size and high conversion efficiency has an increasing demand on small power applications. Some design techniques to transmit power by customized cores are already developed. However, when transferring energy by wide-gap transformers employing small size commercialized cores, the power losses on the winding greatly increase as the frequency increases. Then, the efficiency of the contactless power system decreases significantly due to the conduction loss and reactive components in the resonant circuit. Even though series parallel resonant converters (SPRC) are largely employed which can provide infinite shunt impedance regardless of the coupling coefficient, when a commercialized core is employed for loosely coupled contactless power transfer applications, the large leakage inductance of the transformer significantly influences on additional power dissipation on transformer windings. In this paper, an operating principle how the contactless transformer with commercialized core contributes to the low efficiency is discussed. Also, a new frequencydependent R-L ladder circuit model is introduced for the designoriented analysis of wide air-gap contactless power converters including the frequency dependent losses of the transformer. New design procedure with the proposed model is suitable for the contactless transformers employing commercialized cores. The proposed design approach is validated by 98.8W hardware experiments. Finally the simulation waveforms and the hardware results are compared to verify the accuracy of the frequency dependant-transformer model. 0278-0046 (c)

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Section: -Selection Of the Capacitance Parametersmentioning

confidence: 99%

Wide-Air-Gap Transformer Model for the Design-Oriented Analysis of Contactless Power Converters

Thenathayalan

Park

2015

IEEE Trans. Ind. Electron.

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“…Frequency [19], [14] Compensating circuit [20] Environmental Analysis Temperature, humidity [7], [14] Ferrite Core Multiple Transmitters Add additional coils [21].…”

Section: Circuit Designmentioning

confidence: 99%

Discrete-dipole approximation model for control and optimization of a holographic metamaterial antenna

et al. 2014

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Since the discovery of materials with negative refractive index, widely known as metamaterials, it has been possible to develop new devices that utilize a metamaterial's ability to control the path of electromagnetic energy. Of particular promise, and already under intensive development for commercial applications, are metamaterial antennas for satellite communications. Using reconfigurable metamaterials in conjunction with the principles of holography, these new antennas can electronically steer the high gain antenna beam required for broadband communications while not having any moving parts, being thinner, lighter weight, and less expensive, and requiring less power to operate than conventional alternatives. Yet, the promise of these devices will not be realized without efficient and effective control and optimization. Toward this end, in this paper a discrete-dipole approximation (DDA) model of a waveguide-fed planar metamaterial antenna is derived. The proposed model is demonstrated to accurately predict the radiation of a two-dimensional metamaterial at a much reduced computational cost to full-wave simulation and at much greater fidelity than simpler models typically used in the field. The predictive capabilities of the derived DDA model opens possibilities for model-based control design for optimal beam steering.

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“…A prototype is designed which operates at 100 kHz switching frequency having gap between primary and secondary side of 200mm. with 6.6 kW output a system efficiency of 95.57% is achieved [2]. An integrated wireless sensor network with waspmote and meshlium gateway is designed to save energy by controlling light intensity by pulse width modulation.…”

Section: Introductionmentioning

confidence: 99%

Optimization and Implementation of Intelligent RF Remote Controlled Heater System

Singh¹,

Kuchhal²,

Yadav³

et al. 2015

IJCA

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Analysis and design of wireless power transfer system with an intermediate coil for high efficiency

Abstract: This p a p er p resents a theoretical anal y sis,

Cited by 42 publications

References 9 publications

Wide-Air-Gap Transformer Model for the Design-Oriented Analysis of Contactless Power Converters

Wide-Air-Gap Transformer Model for the Design-Oriented Analysis of Contactless Power Converters

Discrete-dipole approximation model for control and optimization of a holographic metamaterial antenna

Optimization and Implementation of Intelligent RF Remote Controlled Heater System

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