Analysis and Decoupling Design of a 30 MHz Resonant SEPIC Converter

Zhang, Zhiliang; Lin, Jingya; Yuan, Zhijun; Ren, Xiaoyong

doi:10.1109/tpel.2015.2472479

Cited by 54 publications

(28 citation statements)

References 19 publications

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“…2c). Furthermore, the HVDR was empirically designed for operation at resonance and implemented in a SEPIC converter in [12]. Although not discussed in the aforementioned references, the HVDR is an improved design of the series-C VDR.…”

Section: Fig 2bmentioning

confidence: 99%

Class-E Half-Wave Zero dv/dt Rectifiers for Inductive Power Transfer

Kkelis

Yates

Mitcheson

2017

IEEE Trans. Power Electron.

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This paper analyses and compares candidate zero dv/dt half-wave Class-E rectifier topologies for integration into multi-MHz inductive power transfer (IPT) systems. Furthermore, a hybrid Class-E topology comprising advantageous properties from all existing Class-E half-wave zero dv/dt rectifiers is analysed for the first time. From the analysis, it is shown that the hybrid Class-E rectifier provides an extra degree of design freedom which enables optimal IPT operation over a wider range of operating conditions. Furthermore, it is shown that by designing both the hybrid and the current driven rectifiers to operate below resonance provides a low deviation input reactance and inherent output voltage regulation with duty cycle allowing efficient IPT operation over wider dc load range than would otherwise be achieved. A set of case studies demonstrated the following performances: 1) For a constant dc load resistance, a receiving end efficiency of 95 % was achieved when utilising the hybrid rectifier, with a tolerance in required input resistance of 2.4 % over the tested output power range (50 to 200 W). 2) For a variable dc load in the range of 100 % to 10 %, the hybrid and current driven rectifiers presented an input reactance deviation less than 2 % of the impedance of the magnetising inductance of the inductive link respectively and receiving end efficiencies greater than 90 %. 3) For a constant current in the receiving coil, both the hybrid and the current driven rectifier achieve inherent output voltage regulation in the order of 3 % and 8 % of the nominal value respectively, for a variable dc load range from 100 % to 10 %.

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Section: Fig 2bmentioning

confidence: 99%

Class-E Half-Wave Zero dv/dt Rectifiers for Inductive Power Transfer

Kkelis

Yates

Mitcheson

2017

IEEE Trans. Power Electron.

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“…Resonant rectifiers have important roles in many applications such as wireless power transfer (WPT) systems [1][2][3][4][5][6][7], rectifier part of the resonant DC-DC converters [8][9][10][11][12][13][14][15][16], and energy harvesting circuits [17]. The resonant rectifiers are suitable for high-frequency and high-efficiency operations due to the soft switching [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15]17]. For designs of the resonant rectifier, it is important and helpful to comprehend typical characteristics, for example, AC-to-DC transfer function, peak voltage across the rectifier diode, and power output capability.…”

Section: Introductionmentioning

confidence: 99%

Analysis and design of generalized class-E rectifier

Asiya

Osato

Wei

et al. 2020

NOLTA

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This paper presents a semi-analytical expression of the generalized class-E rectifier. Effect of low output-filter inductance is included in the theoretical formula presented in this paper. The harmonic components are considered in the current flowing through the outputfilter inductance. For obtaining the theoretical waveforms, the coefficients of each frequency component are obtained by numerical calculations. By using the semi-analytical expression, characteristics of the class-E rectifier can be comprehended in a theoretical manner. By varying the output-filter inductance, it is possible to improve the rectifier characteristics, such as larger power output capability and zero input reactance, compared with the traditional class-E rectifiers. This paper also presents two examples of designs and implementations of resonant converters with the class-E rectifier. The validity of the semi-analytical expression and design strategies were confirmed from the quantitative agreements with experimental and PSpice simulation results.

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“…Gate drive losses at a gate voltage of 6 V were measured to be 0.54 W. The Class E dc/dc converter was not implemented with a feedback control loop. Improved output regulation can be achieved using ON-OFF control, which has been the common control method applied in recent MHz converters [7], [17]- [19], however at the expense of increased circuit complexity. Table III compares the results of the developed converter with recent work in MHz dc/dc conversion.…”

Section: B 150-w 10-mhz Class E Dc/dc Boost Converter With Inherent mentioning

confidence: 99%

Load-Independent Class E/EF Inverters and Rectifiers for MHz-Switching Applications

Aldhaher

Yates

Mitcheson

2018

IEEE Trans. Power Electron.

192

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This paper presents a unified framework for the modeling, analysis, and design of load-independent Class E and Class EF inverters and rectifiers. These circuits are able to maintain zero-voltage switching and, hence, high efficiency for a wide load range without requiring tuning or use of a feedback loop, and to simultaneously achieve a constant amplitude ac voltage or current in inversion and a constant dc output voltage or current in rectification. As switching frequencies are gradually stepping into the megahertz (MHz) region with the use of wide-bandgap (WBG) devices such as GaN and SiC, switching loss, implementing fast control loops, and current sensing become a challenge, which loadindependent operation is able to address, thus allowing exploitation of the high-frequency capability of WBG devices. The traditional Class E and EF topologies are first presented, and the conditions for load-independent operation are derived mathematically; then, a thorough analytical characterization of the circuit performance is carried out in terms of voltage and current stresses and the power-output capability. From this, design contours and tables are presented to enable the rapid implementation of these converters given particular power and load requirements. Three different design examples are used to showcase the capability of these converters in typical MHz power conversion applications using the design equations and methods presented in this paper. The design examples are chosen toward enabling efficient and high-power-density MHz converters for wireless power transfer (WPT) applications and dc/dc conversion. Specifically, a 150-W 13.56-MHz Class EF inverter for WPT, a 150-W 10-MHz miniature Class E boost converter, and a lightweight wirelessly powered drone using a 20-W 13.56-MHz Class E synchronous rectifier have been designed and are presented here. Index Terms-DC-AC power converters, resonant inverters, wireless power transmission, zero voltage switching. I. INTRODUCTION T HE full exploitation of wide-bandgap (WBG) devices is driving the design of ever higher frequency converters

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Analysis and Decoupling Design of a 30 MHz Resonant SEPIC Converter

Cited by 54 publications

References 19 publications

Class-E Half-Wave Zero dv/dt Rectifiers for Inductive Power Transfer

Class-E Half-Wave Zero dv/dt Rectifiers for Inductive Power Transfer

Analysis and design of generalized class-E rectifier

Load-Independent Class E/EF Inverters and Rectifiers for MHz-Switching Applications

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