Analysis and design of LCL-type series resonant converter

Bhat, A.K.S.

doi:10.1109/intlec.1990.171244

Cited by 38 publications

(27 citation statements)

References 7 publications

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“…From the previous discussions, we are left with mainly the following six soft-switching converter configurations for the electrolyzer application: 1) fixed-frequency series resonant converter (SRC) [6]; 2) fixed-frequency parallel resonant converter (PRC) [7]; 3) fixed-frequency series-parallel or LCC-type resonant converter (SPRC) [8]; 4) fixed-frequency LCL SRC with a capacitive output filter [9], [10]; 5) fixed-frequency LCL SRC with an inductive output filter [11]; 6) fixed-frequency phase-shifted ZVS PWM full-bridge converter [12]- [14]. Among the aforementioned six converter configurations, the SRC (see Fig.…”

Section: Specifications and Possible Converter Configurationsmentioning

confidence: 99%

“…6. This converter has been analyzed using the Fourier series [9] and approximate (complex ac circuit) [10] analysis approaches. It has been shown that the converter operates in lagging power factor (PF) mode for a very wide change in load and the supply voltage variations, thus ensuring ZVS for all the primary switches.…”

Section: A Fixed-frequency Lcl Src With Capacitive Output Filtermentioning

confidence: 99%

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A Comparison of Soft-Switched DC-to-DC Converters for Electrolyzer Application

Gautam

Bhat

2013

IEEE Trans. Power Electron.

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An electrolyzer is part of a renewable energy system and generates hydrogen from water electrolysis that is used in fuel cells. A dc-to-dc converter is required to couple the electrolyzer to the system dc bus. This paper presents the design of three soft-switched high-frequency transformer isolated dc-to-dc converters for this application based on the given specifications. It is shown that LCL-type series resonant converter (SRC) with capacitive output filter is suitable for this application. Detailed theoretical and simulation results are presented. Due to the wide variation in input voltage and load current, no converter can maintain zero-voltage switching (ZVS) for the complete operating range. Therefore, a two-stage converter (ZVT boost converter followed by LCL SRC with capacitive output filter) is found suitable for this application. Experimental results are presented for the two-stage approach which shows ZVS for the entire line and load range.Index Terms-DC-to-DC converters, electrolyzer, renewable energy system (RES), resonant converters.

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Section: Specifications and Possible Converter Configurationsmentioning

confidence: 99%

Section: A Fixed-frequency Lcl Src With Capacitive Output Filtermentioning

confidence: 99%

A Comparison of Soft-Switched DC-to-DC Converters for Electrolyzer Application

Gautam

Bhat

2013

IEEE Trans. Power Electron.

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“…The detailed principle of this topology can be seen in [9]- [15]. Herein L 1 , L 2 , and C 1 are resonant components, and C 2 is a dc blocking capacitor whose capacitance can be considered as infinite.…”

Section: Flexible Converter With Two Selectable Topologiesmentioning

confidence: 99%

A Flexible Converter With Two Selectable Topologies

Hang

Liu

2009

IEEE Trans. Ind. Electron.

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In order to satisfy the requirement of wide adaptability for standard power modules in the scheme of power electronics system integration, a novel conception of flexible converter is proposed. Next, a practical case of flexible converter with two selectable topologies based on LLC resonant converter with frequency modulation is also proposed. This converter can operate under two various topologies to satisfy various applications only by altering the connecting mode of the output pins. This converter is suitable for two applications of V /I output and 2V /(I/2) output and the voltage stresses and current stresses of all main components are peer to peer under these two applications. The design considerations of small-signal, electromagnetic compatibility, and layout for the flexible converter are also discussed. A prototype with selectable output of 110 V/10 A and 220 V/5 A is built to verify the aforementioned analysis and the highest efficiency is above 96%.Index Terms-Flexible converters, LLC resonant converter, power electronics system integration (PESI), standard power modules (SPMs).

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“…To improve the soft switching range of the DAB various Resonant Dual Active Bridge (RDAB) topologies have been proposed [5][6][7], however they all still had large reactive currents in the High Frequency (HF) link. In [8] an Inductor Capacitor Inductor (LCL) RDAB was proposed and has been shown to be able to regulate the output voltage with small variation to the switching frequency. Borage has shown that the LCL RDAB has in-built constant current(CC) -constant voltage (CV) characteristics when it is operated at the tuned resonant frequency of the circuit [9], [10].…”

Section: Introductionmentioning

confidence: 99%

Modeling and control of a CLC Resonant Dual Active Bridge

Malan

Vilathgamuwa

Walker

et al. 2014

2014 Australasian Universities Power Engineering Conference (AUPEC)

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This paper proposes a linear large signal state-space model for a phase controlled CLC (Capacitor Inductor Capacitor) Resonant Dual Active Bridge (RDAB). The proposed model is useful for fast simulation and for the estimation of state variables under large signal variation. The model is also useful for control design because the slow changing dynamics of the dq variables are relatively easy to control. Simulation results of the proposed model are presented and compared to the simulated circuit model to demonstrate the proposed model's accuracy. This proposed model was used for the design of a ProportionalIntegral (PI) controller and it has been implemented in the circuit simulation to show the proposed models usefulness in control design.

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Analysis and design of LCL-type series resonant converter

Cited by 38 publications

References 7 publications

A Comparison of Soft-Switched DC-to-DC Converters for Electrolyzer Application

A Comparison of Soft-Switched DC-to-DC Converters for Electrolyzer Application

A Flexible Converter With Two Selectable Topologies

Modeling and control of a CLC Resonant Dual Active Bridge

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