Steady-State Analysis of Isolated Class-E$^2$ Converter Outside Nominal Operation

Nagashima, Tadamichi; Wei, Xiuqin; Bou, Elisenda; Alarcón, Eduard; Kazimierczuk, Marian K.; Sekiya, Hiroo

doi:10.1109/tie.2016.2631439

Cited by 41 publications

(34 citation statements)

References 34 publications

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“…One converter has the class-E rectifier with the largest power output capability and another with no input reactance. Figure 14 shows a circuit topology of the class-E 2 DC-DC converter [9,21]. For the design the converter, operating frequency is f = 6.78 MHz, input voltage V I = 20 V, the duty ratio of the inverter switch D S = 0.5, loaded quality factor of the inverter Q = 10, and load resistance R = 20 Ω were specified.…”

Section: Experimental Verificationsmentioning

confidence: 99%

“…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%

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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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Section: Experimental Verificationsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Analysis and design of generalized class-E rectifier

Asiya

Osato

Wei

et al. 2020

NOLTA

Self Cite

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“…It is assumed in the power loss analysis that ESRs, forward diode voltage, and rectifying diode ON-resistance do not affect the rectifier waveforms [5], [8], [9]. The resulting equations of P D /P o , P Ln /P o , P L f /P o are given in Appendix B.…”

Section: Power Conversion Efficiencymentioning

confidence: 99%

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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“…Some resonant AC/DC rectifier applications can be founded for low power energy harvesting and lighting systems [13], [14]. In all instances, the motivation behind is to perform the soft-switching conditions: zero-voltage (ZVS), zero-current (ZCS) and zero-derivative (ZDS) switching, which make possible to reduce switching losses and increase the operating frequency [15]- [19].…”

Section: Introductionmentioning

confidence: 99%

“…However, in order to achieve such optimal steadystate operation, it is necessary to obtain analytical waveforms, which have high mathematical complexity. Most of previous researches of the Class-E 2 resonant converter analyze the topology by separating the inverter and the rectifier stages [12], [15], [21]- [23]. This simplification can be used to design the converter, however, it is necessary to ensure the both stages are compatible with each other.…”

Section: Introductionmentioning

confidence: 99%

Steady-State Analysis and Design Methodology for Class-E2 Resonant DC/DC Converters Based on a Normalized State-Space Model

Mendonca¹,

Cipriani²,

Naidon³

et al. 2020

Eletrônica de Potência

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This paper presents a steady-state analysis and design methodology for the Class-E 2 resonant DC/DC converter. The converter is represented in a normalized state-space model that is independent of specifications and real system components, like as inductors, capacitors and resistors. Analytical waveforms are obtained and can be used to design the converter. The main contribution of the paper is the development of an analysis methodology that does not separate the inverter and rectifier stages and ensures the soft-switching on both switch and diode. A step-by-step design procedure is presented, in which the real system components can be obtained based on design abacus. A comparison among theoretical, simulation and experimental results are performed based on a design example.

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Steady-State Analysis of Isolated Class-E$^2$ Converter Outside Nominal Operation

Cited by 41 publications

References 34 publications

Analysis and design of generalized class-E rectifier

Analysis and design of generalized class-E rectifier

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

Steady-State Analysis and Design Methodology for Class-E2 Resonant DC/DC Converters Based on a Normalized State-Space Model

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Steady-State Analysis of Isolated Class-E$^2$ Converter Outside Nominal Operation

Cited by 41 publications

References 34 publications

Analysis and design of generalized class-E rectifier

Analysis and design of generalized class-E rectifier

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

Steady-State Analysis and Design Methodology for Class-E2 Resonant DC/DC Converters Based on a Normalized State-Space Model

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