Design of high-efficiency inductive-coupled wireless power transfer system with class-DE transmitter and class-E rectifier

Inoue, Kazuhide; Nagashima, Tadamichi; Wei, Xiuqin; Sekiya, Hiroo

doi:10.1109/iecon.2013.6699205

Cited by 14 publications

(15 citation statements)

References 11 publications

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“…These converters tend to produce square wave voltages (consisting of high frequency components as shown in (10), which will be used in the following analysis) instead of sinusoidal wave voltages. Subsequently, the input current THD levels can become significant especially when coupling coefficient is increased as shown in Fig.…”

Section: E Total Harmonic Distortionmentioning

confidence: 99%

“…In addition, the success of implementing WPT in such applications is determined by the power levels [7], efficiencies [8], gap distance variations or misalignment tolerances [9] of the system's requirements. These challenges give rise to advanced developments in WPT systems in power electronics [10], controls [11] and coil optimization [12] areas.…”

Section: Introductionmentioning

confidence: 99%

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Analysis of impedance matched circuit for wireless power transfer

Ong

Sampath

Beng

et al. 2014

IECON 2014 - 40th Annual Conference of the IEEE Industrial Electronics Society

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Typical wireless power transfer systems utilize series compensation circuit which is based on magnetic coupling and resonance principles that was first developed by Tesla. However, changes in coupling caused by gap distance, alignment and orientation variations can lead to reduce power transfer efficiencies and the transferred power levels. This paper proposes impedance matched circuit to reduce frequency bifurcation effect and improve on the transferred power level, efficiency and total harmonic distortion (THD) performance of the series compensation circuit. A comprehensive mathematical analysis is performed for both series and impedance matched circuits to show the frequency bifurcation effects in terms of input impedance, variations in transferred power levels and efficiencies. Matlab/Simulink results validate the theoretical analysis and shows the circuits' THD performance when circuits are fed with power electronic converters.

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Section: E Total Harmonic Distortionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Analysis of impedance matched circuit for wireless power transfer

Ong

Sampath

Beng

et al. 2014

IECON 2014 - 40th Annual Conference of the IEEE Industrial Electronics Society

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“…Recently, there are many researches and development about the wireless power transfer (WPT) systems [1]- [5]. Resonant inductive coupling (RIC) [1] is one of the coupling methods for WPT systems and it has been widely used for a variety of applications benefiting from wireless power transfer, such as wireless battery charging for electric vehicles [2], bio-medical implants [3], and so on.…”

Section: Introductionmentioning

confidence: 99%

“…By satisfying the class-E ZVS/ZDS conditions in the class-DE inverter at switch turn-on instant and those in the class-E rectifier at switch turn-off instant, high power-conversion efficiency can be achieved at high frequencies. In previous research [5], the WPT system applied class-DE-E dc-dc converter and its numerical design procedure have been presented. However, it is also important for designers to obtain the analytical design equations of the system.…”

Section: Introductionmentioning

confidence: 99%

Analytical design procedure for resonant inductively coupled wireless power transfer system with class-DE inverter and class-E rectifier

Nagashima

Wei

Sekiya

2014

2014 IEEE Asia Pacific Conference on Circuits and Systems (APCCAS)

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This paper presents a resonant inductive coupling wireless power transfer (RIC-WPT) system with a class-DE and class-E rectifier along with its analytical design procedure. By using the class-DE inverter as a transmitter and the class-E rectifier as a receiver, the designed WPT system can achieve a high power-conversion efficiency because of the class-E ZVS/ZDS conditions satisfied in both the inverter and the rectifier. In the simulation results, the system achieved 79.0 % overall efficiency at 5 W (50 Ω) output power, coupling coefficient 0.072, and 1 MHz operating frequency. Additionally, the simulation results showed good agreement with the design specifications, which indicates the validity of the design procedure.

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“…An interesting feature of the Class DE topology is their ability to achieve both zero-voltage switching (ZV S) and zero-derivative switching (ZDS) con ditions, thereby yielding high power-conversion efficiency, especially at high switching frequencies. This makes them suitable for applications such as RF power supplies and RF power amplifiers [3], induction heating [4], on-chip converters [5], [6], wireless-power transfer systems [7], [8], [20], etc. The Class-DE inverter shares a few features of Class-E as well as Class-D inverters making them an ideal choice for high-power applications [8], [12]- [ 19].…”

Section: Introductionmentioning

confidence: 99%

Analysis and design of full-bridge Class-DE inverter at fixed duty cycle

Luca

Grasso

Jacopo

et al. 2016

IECON 2016 - 42nd Annual Conference of the IEEE Industrial Electronics Society

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Abstract-This paper presents the following for a full-bridge Class-DE resonant inverter operating at a fixed duty ratio: (a) steady-state analysis using first-harmonic approximation and (b) derivation of closed-form expressions for the currents, voltages, and powers. The conversion from a series-parallel resonant network to a series resonant network is presented. Imposing the zero-voltage and zero-derivative switching conditions, the expression for a shunt capacitance across the MOSFETs in the inverter bridge is derived. The closed-form expressions to calculate the values of the resonant components are presented.A practical design of a Class-DE resonant inverter supplied by a dc input voltage of 230 V, delivering an output power of 920 W, and operating at a switching frequency of 100 kHz is considered and its design methodology is included. Theoretical results are validated by Saber simulations.

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Design of high-efficiency inductive-coupled wireless power transfer system with class-DE transmitter and class-E rectifier

Cited by 14 publications

References 11 publications

Analysis of impedance matched circuit for wireless power transfer

Analysis of impedance matched circuit for wireless power transfer

Analytical design procedure for resonant inductively coupled wireless power transfer system with class-DE inverter and class-E rectifier

Analysis and design of full-bridge Class-DE inverter at fixed duty cycle

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