AC–AC Hybrid Boost Switched-Capacitor Converter

Dall’Asta, Matheus Schramm; Barbi, I.; Lazzarin, Telles Brunelli

doi:10.1109/tpel.2020.2992490

Cited by 18 publications

(5 citation statements)

References 24 publications

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“…An interesting choice consists on employing the PC mode, operating with a higher switching frequency. This way, both capacitance value and series resistance can be attenuated without the incident of high current peaks at the switches, consisting in a good cost/benefit relationship [13]. However, the switching losses that arise from the rise of f s cannot be neglected, making it mandatory to search for an equilibrium point between those two factors.…”

Section: Pc Ncmentioning

confidence: 99%

Analysis and Design of an Interleaved Switched-Capacitor Multilevel ANPC Converter

Bach¹,

Castiblanco²,

Rech³

2021

Proceedings of the 13th Seminar on Power Electronics and Control (SEPOC 2021)

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This paper presents an interleaved switchedcapacitor multilevel ANPC converter (SCANPC) for high power density applications. To demonstrate the feasibility of the idea, the analysis and design of the converter are made initially for one cell and after for the two cells interleaved configuration. In addition, it is used a power loss estimation methodology for the Gallium Nitride switches. Simulations and power loss estimations are shown for a 4kW power prototype.

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Section: Pc Ncmentioning

confidence: 99%

Analysis and Design of an Interleaved Switched-Capacitor Multilevel ANPC Converter

Bach¹,

Castiblanco²,

Rech³

2021

Proceedings of the 13th Seminar on Power Electronics and Control (SEPOC 2021)

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“…Inspection of the curves shown in Figure 6, reveals that the currents become independent of the frequency when f S τ ≥ 0.2. Adopting f S τ = 0.4, C s is defined as presented in (17).…”

Section: Theoretical Analysis Of the Proposed Convertermentioning

confidence: 99%

“…Isolated dc-dc converters combining switched capacitor circuits and conventional isolated dc-dc topologies were proposed, aiming to reduce power switches voltage ratings and allow operation with wide voltage conversion range. The integration of the switched capacitor ladder cell with LLC resonant converters has been proposed in recent papers [17], [18], with the purpose of reducing the voltage stress of the the power semiconductors preserving the other desirable characteristics of the LLC converter, which includes low switching losses and operation with high switching frequencies without sacrificing efficiency. The converter presented in [18] features ZVS on the input switches, zero current switching (ZCS) on the output diodes, a small variation in the static gain with load variation, and all the advantages of the ladder cell.…”

Section: Introductionmentioning

confidence: 99%

Asymmetrical ZVS-PWM Half-Bridge-Type Switched-Capacitor DC-DC Converter Isolated with Peak Voltage Equal to Vin/2 Switch

Caús¹,

Barbi²

2021

Eletrônica de Potência

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This paper presents a new power converter topology generated by the integration of the asymmetrical ZVS-PWM dc-dc converter with a switched-capacitor ladder-type commutation cell. Circuit operation and theoretical analysis with emphasis on the soft-commutation process are included in the paper. The main advantage of the proposed converter with respect to the conventional asymmetrical half-bridge dc-dc converter is the reduction of the voltage stress across the power switches to the half of the input dc bus voltage, enabling the utilization of lower voltage rating components. Experiments conducted on a laboratory prototype with 1.4 kW power-rating, 800 V input voltage, 48 V output voltage and 100 kHz switching frequency are included to verify the theoretical analysis and the design methodology. The maximum efficiency of the experimental non-optimized prototype was 93.6%.

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“…In this case, the output power quality is a target, not the buck-boost operation. The family of single-mode PWM ac-ac converters consists of P-type [29], dual-buck converter [30], switched-boost converter [31,32], Cockcroft-Walton [33], and switched-capacitor boost structure [34]. By reviewing previous literature, the following problems are surveyed: I.…”

Section: Introductionmentioning

confidence: 99%

“…In this case, the output power quality is a target, not the buck‐boost operation. The family of single‐mode PWM ac‐ac converters consists of P‐type [29], dual‐buck converter [30], switched‐boost converter [31, 32], Cockcroft‐Walton [33], and switched‐capacitor boost structure [34]. By reviewing previous literature, the following problems are surveyed: When employing a coupled inductor in the converter architecture, it is expected to reach a high boost factor because the winding ratio of the coupled inductor helps increase the gain.…”

Section: Introductionmentioning

confidence: 99%

High step‐up direct ac‐ac boost converter with optimal component counts based on SEPIC

Lahooti Eshkevari,

Abdoli,

Karimi Hajiabadi

et al. 2024

IET Power Electronics

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This paper introduces a new direct step‐up ac‐ac converter designed based on the SEPIC. It provides a higher step‐up conversion ratio than other counterparts with valuable features like high efficiency, reasonable input and output total harmonic distortions (THD), continuous input current waveform, common ground, few components, and single‐stage conversion without snubber and LC filters. Unlike most counterparts, the duty cycle can be varied between zero and one in boost operation and is not limited to any value below one. The voltage stress on one switch is reduced by increasing the winding coefficient of the utilized coupled inductor, and current stress on another is independent of this coefficient. It reduces the switches' losses and improves the converter efficiency. Thanks to the above attributes, the proposed converter is suitable for inductive power transfer from low‐voltage ac sources, operating as an ac voltage regulator for sensitive ac loads, and any applications that require a boost converter with few components. This article shows the converter's operation principle and evaluates its performance through experiments on a 225 W prototype. Accordingly, the maximum obtained efficiency is 95.4%. The input and output current THDs for the nominal inductive load equal 4.5 and 2.8%, respectively. Results confirm the claims.

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AC–AC Hybrid Boost Switched-Capacitor Converter

Cited by 18 publications

References 24 publications

Analysis and Design of an Interleaved Switched-Capacitor Multilevel ANPC Converter

Analysis and Design of an Interleaved Switched-Capacitor Multilevel ANPC Converter

Asymmetrical ZVS-PWM Half-Bridge-Type Switched-Capacitor DC-DC Converter Isolated with Peak Voltage Equal to Vin/2 Switch

High step‐up direct ac‐ac boost converter with optimal component counts based on SEPIC

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