A 1MHz Class-E2 Single-Stage PFC Converter with Frequency Control

Zhu, Wenqi; Sekiya, Hiroo

doi:10.1109/apec39645.2020.9124248

Cited by 7 publications

(15 citation statements)

References 28 publications

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“…Therefore, the class-E amplifier works with high power-conversion efficiency at high frequencies. Because of this characteristic, the class-E amplifier is suitable for applications such as WPT systems [1], [2], [4], [5], [25], resonant power converters [7]- [12], and induction heating systems [14].…”

Section: B Class-e Amplifiermentioning

confidence: 99%

“…For reducing the switching loss, the soft-switching technique is mandatory. The class-E switching circuit families, such as class-E [1], [3]- [5], [7]- [10], [14], [16]- [28], class-DE [13], [29], and class-EF [1], [30] ampifiers, have gained researcher's interest in recent years. This is because they can achieve the class-E zero-voltage switching (ZVS) and zero-derivative switching (ZDS) conditions, which reduces the switching loss significantly.…”

Section: Introductionmentioning

confidence: 99%

“…Generally, the design methods of the class-E switching circuits can be divided into two approaches: the analytical design [1]- [3], [16], [17], [23], [29] and the numerical one [7], [18]- [20], [31]. By adopting analytical design procedures, we can explicitly comprehend the relationship between circuit component values and parameters, which helps to intuitively and comprehensively understand the circuit characteristics.…”

Section: Introductionmentioning

confidence: 99%

“…The numerical design procedures [7], [18]- [20], [31] can consider complicated circuit characteristics. Therefore, the accuracies of the numerical design results are improved compared with the analytical designs.…”

Section: Introductionmentioning

confidence: 99%

“…Therefore, the accuracies of the numerical design results are improved compared with the analytical designs. In the designs of the class-E inverter, the algebraic equation solver, such as Newton's method, is widely used for obtaining the nominal design values [7], [18]- [20]. However, there are several limitations and issues in Newton's method-based designs.…”

Section: Introductionmentioning

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: B Class-e Amplifiermentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

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

Zhu¹,

Komiyama

Nguyen

et al. 2021

IEEE Access

Self Cite

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DFO and PI Based Dual Control for Single Stage SEPIC and LLC Based PFC Converter

Desline¹,

Vijayarajan²

2022

J. Electr. Eng. Technol.

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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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A 1MHz Class-E2 Single-Stage PFC Converter with Frequency Control

Cited by 7 publications

References 28 publications

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

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

DFO and PI Based Dual Control for Single Stage SEPIC and LLC Based PFC Converter

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

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