Class E low dv/dt and low di/dt rectifiers: energy transfer, comparison, compact relationships

Birca-Galateanu, Ş.; Ivaşcu, A.

doi:10.1109/81.948434

Cited by 13 publications

(7 citation statements)

References 30 publications

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“…where M I is the ratio of output current to the peak of the ac input current (ac to dc current gain). In order to directly relate the input ac resistance to the required X value, (5) and (6) are substituted into (4) and the variables are rearranged such that an expression is formed relating the ratio of the ac resistance to the required X value. This ratio will be called input loaded quality factor, Q in , and is given by the following expressions:…”

Section: Design For Integration In Ipt Systemsmentioning

confidence: 99%

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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: Design For Integration In Ipt Systemsmentioning

confidence: 99%

“…Class-E rectifiers, [4], [5], are very popular in multi-MHz resonant converters [6]- [13] due to their efficient soft switching capability and low electromagnetic footprint. Due to their success in resonant converters, the utilisation of Class-E rectifiers is gaining popularity in weakly coupled multi-MHz IPT systems [14]- [16].…”

Section: Introductionmentioning

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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“…R ESONANT rectifier is advisable for the high-efficiency and high-frequency operations owing to its softswitching. The class E rectifier is a typical resonant rectifier, which achieves high efficiency at high frequencies because of the class-E zero-voltage switching and zero-derivative switching (ZVS/ZDS) [1]- [11]. The class-E rectifier is, however, suffered from high rectifying-diode voltage stress [1].…”

Section: Introductionmentioning

confidence: 99%

“…The class E rectifier is a typical resonant rectifier, which achieves high efficiency at high frequencies because of the class-E zero-voltage switching and zero-derivative switching (ZVS/ZDS) [1]- [11]. The class-E rectifier is, however, suffered from high rectifying-diode voltage stress [1]. To insert n-th harmonic resonant network into the class-E topology is one of the solutions to the diode-voltage stress problem.…”

Section: Introductionmentioning

confidence: 99%

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Generalized Analysis and Performance Investigation of the Class-E/F_n Rectifiers

Asiya

Wei

et al. 2020

IEEE Access

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This paper gives analytical waveform equations of the class-E/F n rectifier. By using the analytical waveforms, we investigate performances of the class-E/F 2 and E/F 3 rectifiers at any quality factor of the harmonic-resonant and output filters. From the investigations, the rectifier performances, such as the power output capability and the AC-DC current transfer function, are clarified. Besides, the design parameters of the class-E/F n rectifier with no input reactance, which is called the class-Φ n rectifier, are obtained. Four types of rectifiers, namely, class-E/F 2 , E/F 3 , Φ 2 , and Φ 3 rectifiers, were designed and implemented as a part of the resonant DC-DC converters. The experimental and PSpice-simulation results verified the analytical waveform equations and the performance investigation.

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