Design of generalized class E<sup>2</sup> dc/dc converter

Sekiya, Hiroo; Lü, Jianming; Yahagi, Takashi

doi:10.1002/cta.229

Cited by 21 publications

(5 citation statements)

References 17 publications

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“…One of the major research topics of the class-E switching circuits has been to establish the design methods since the class-E switching circuit was invented about 40 years ago. Generally, the design methods of the class-E switching circuit can be divided into two kinds, namely analytical designs [1]- [3], [16], [17], [23], [29], [32] and numerical ones [5], [7]- [9], [18], [20], [21].…”

Section: Design Methods Of the Class-e Switching Circuitsmentioning

confidence: 99%

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Comprehensive and Simplified Numerical Design Procedure for Class-E Switching Circuits

Zhu¹,

Komiyama

Nguyen

et al. 2021

IEEE Access

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This paper proposes comprehensive and simplified numerical design procedures for the class-E switching circuits with the Particle Swarm Optimization (PSO) algorithm. The PSO algorithm does not require approximate solutions and partial differentiation derivations. Therefore, the proposed design method has higher convergence stability than Newton's method-based design. It is also a feature that the PSO algorithm allows the mismatch between the design condition and the design parameter numbers. As a design example, we successfully draw the multiple design curves of the class-E amplifier and frequency multipliers by one-time optimization execution with the modified PSO algorithm. Besides, we show a pretty simple design procedure of the class-E amplifier, which uses only one evaluation function for determining three design parameters. The design accuracy of the proposed design method does not deteriorate compared with the previous design method. We carried out circuit experiments, which achieved power-conversion efficiency of 94.0%. The circuit experiment showed agreement with numerical predictions, which confirmed the validity and usefulness of the proposed design method.

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Section: Design Methods Of the Class-e Switching Circuitsmentioning

confidence: 99%

“…Numerical design methods can provide the design parameters even if the design circuit is complicated to analyze. Therefore, designs of many types of the class-E switching circuits, which had been considered impossible to design due to complexity, were succeeded [5], [7]- [9], [18]- [20], [22].…”

Section: B Numerical Design Approachesmentioning

confidence: 99%

Comprehensive and Simplified Numerical Design Procedure for Class-E Switching Circuits

Zhu¹,

Komiyama

Nguyen

et al. 2021

IEEE Access

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“…The three conditions in Equation () mean ZVS condition, ZDS condition, and rated output‐voltage satisfaction, respectively. The converter parameters

λ

can be obtained by solving the algebraic equations in Equation () numerically with the computation techniques presented in [37, 39]. Figure 8 shows the flowchart of the derivation of

λ

.…”

Section: Design Strategymentioning

confidence: 99%

“…This is because most of them are hardswitching converters [9][10][11][12][13][14], which generate large switching losses. For power-conversion efficiency improvements, the resonant topologies, such as the LLC converters [4,5,15,30,31] and class-E converters [7,8,16,21,[32][33][34][35][36][37][38][39], have also been applied to the AC-DC converters [4-8, 15, 16, 20-23, 30-32]. The resonant converters have more circuit components than the traditional converters because of the resonant circuit.…”

mentioning

confidence: 99%

“…A high-frequency operation is required for the resonant single-stage AC-DC converter for reducing the circuit volume as much as possible. The class-E 2 converter [32][33][34][35][36][37], one of the typical resonant converters, is a leading candidate for highfrequency resonant AC-DC converters. Compared with the LLC converter, the class-E 2 converter has no high-side switch, FIGURE 1 System topology of the proposed converter which can avoid the driver-design difficulty at high frequencies.…”

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High‐frequency single‐switch PFC with frequency‐modulation controlled class‐E2 converter

Zhu

Ikari

Lovison

et al. 2021

IET Power Electronics

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This paper presents a single-switch zero-voltage switching (ZVS) power-factor correction converter based on the class-E 2 converter at 1 MHz switching frequency. A design method for ensuring the ZVS for the entire line-voltage period is proposed. By visualising the ZVS region in the parameter space, circuit parameters can be easily obtained to achieve the ZVS for the entire line-voltage period. Additionally, a closed-loop controller is applied for achieving a high power factor, low total harmonic distortion of the input current and output voltage regulation. The experimental circuit achieved the ZVS in the entire line-voltage period against load variations. As a result, the implemented converter achieved the same level of power-conversion efficiency as the 100-kHz power-factor correction converters and a high power factor with low total harmonic distortion, which denoted the effectiveness of the proposed design method. INTRODUCTIONAC-DC power supplies with power factor correction (PFC) are used in a wide range of applications. The applications of AC-DC converters include battery charger [1-6], light-emitting diode (LED) lighting [7-16], electric vehicle (EV) [17, 18] and laptop computer [19, 20]. A two-stage PFC power converter [1, 2, 21-24] is a series connection of an AC-DC converter for correcting PF and a DC-DC one for regulating the output voltage. The two-stage AC-DC converter requires at least two power switches and two individual controllers, which leads to a high cost and a large volume. On the other hand, a single-stage AC-DC converter combines the PFC stage and the voltageregulating one into a single converter [3-16, 20, 24-31]. Therefore, single-stage converters have a small component number and achieve low costs compared with two-stage converters, and are often applied for space-constrained applications such as battery chargers [3-6]. Traditional converter topologies, such as boost [11, 12], buck [13], buck-boost [13, 14], and Flyback converters [9, 10],This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.

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RF power amplifier design using microstrip ring resonator based on image parameter method

Golestanifar

Karimi

2021

Circuit Theory & Apps

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SummaryIn this paper, an RF power amplifier (PA) using a microstrip ring resonator (MRR) structure based on the image parameter method is proposed. The MRR structures are utilized as decoupling circuits at the DC supply of the active device. The design process is quite easy and applicable for microwave and RF PA design. To reach exact data for matching network design, load‐pull technique is applied. The proposed PA is designed and optimized at the frequency range of 2.3 to 2.6 GHz, proper for Wi‐Fi applications. For a source power of 10 dBm, the obtained power gain, efficiency, and dissipated power (Pdiss) are 12.3 dB, 63.6%, and 266 mW, respectively. Also, power added efficiency (PAE) for an input power of 10 dBm is 57%. The proposed PA is fabricated and measured, showing good conformity between the simulation and experimental results.

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Design of generalized class E² dc/dc converter

Cited by 21 publications

References 17 publications

Comprehensive and Simplified Numerical Design Procedure for Class-E Switching Circuits

Comprehensive and Simplified Numerical Design Procedure for Class-E Switching Circuits

High‐frequency single‐switch PFC with frequency‐modulation controlled class‐E2 converter

RF power amplifier design using microstrip ring resonator based on image parameter method

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Design of generalized class E2 dc/dc converter

Cited by 21 publications

References 17 publications

Comprehensive and Simplified Numerical Design Procedure for Class-E Switching Circuits

Comprehensive and Simplified Numerical Design Procedure for Class-E Switching Circuits

High‐frequency single‐switch PFC with frequency‐modulation controlled class‐E2 converter

RF power amplifier design using microstrip ring resonator based on image parameter method

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Design of generalized class E² dc/dc converter