Switched-Capacitor LLC Resonant DC-DC Converter With Switch Peak Voltage of Vin/2

Leandro, Guilherme Martins; Barbi, I.

doi:10.1109/access.2020.3001834

Cited by 14 publications

(13 citation statements)

References 23 publications

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“…The present design is to add a small capacitor in parallel with the switching devices S 1 and S 2 to create a zero-voltage switching for reduction of switching loss. This is also known as soft-switching because the voltage is during the switching transition is zero and it is preferred switching method [26]. C 1 and C 2 are designed specifically so that it can activate the zero switching in a resonant manner and does not affect the current conversion characteristics of switched-inductor converter.…”

Section: Switched-inductor Converter Generationmentioning

confidence: 99%

Topology and Formation of Current Source Step Down Resonant Switched Inductor Converters

Cheng

2022

Energies

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This paper presents a current converter that uses an inductor based approach for interim energy storage. A family of the circuits for step down conversion is examined for both non-inverting and inverting operations. The paper has disclosed the method of the generation, so that any order of 1/n conversion ratio can be made. One of the features is to use two transistors only in the common half-bridge style. The main contribution is its special current conversion capability and soft-switching, because it eliminates switching loss and the spike in the devices using a resonant capacitor with the switched-inductor. The performance has been proved to work well for current bucking. This is a new concept for the power converter and is an advanced development of the conventional switched-inductor converter, switched-capacitor, and resonant converter; it is a duality of the switched-capacitor converter. The paper provides a theoretical approach for the current source topology and its formation. It prepares for vast applications in the current source photovoltaic system and current mode system. Experiment verification and loss analysis have proven the preferable characteristics. Benchmarking comparison with similar converters has been made and advanced features have been described. The proposed converter presents current mode research for increasing application in the coming decade.

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Section: Switched-inductor Converter Generationmentioning

confidence: 99%

Topology and Formation of Current Source Step Down Resonant Switched Inductor Converters

Cheng

2022

Energies

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“…The grid current i g equals the input inductor current i L (i g = i L ), where i L = Σi Ln n ∈ {1, 2, 3, 4}, and the output voltage V o is determined by expression V o = Σv C j,k , j ∈ {1, 2} and k ∈ {A, B}. Therefore, the output variables matrix y results in expression (8).…”

Section: B State-space Analysismentioning

confidence: 99%

“…The SCs allow increased voltage gain by means of diodecapacitor cells, that guarantees the voltage division on the semiconductors. It has been developed for numerous applications, such as LED systems [4], pulse generation [5], and high static gain systems [6], [7], among others [8]- [19].…”

Section: Introductionmentioning

confidence: 99%

Single-Phase Hybrid Switched-Capacitor Interleaved AC-DC Boost Converter

2021

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In this paper a single-phase boost PFC multilevel interleaved high-voltage gain based on the hybrid switched-capacitor concept is presented. The proposed converter merges interphase transformers and switched-capacitor cells to obtain current sharing and high voltage gain. These features allow for both the reduction of voltage and current stresses on the semiconductors. Furthermore, the interleaving method allows for obtaining multilevel voltages at AC terminals, thereby reducing the weight and bulk of the input inductor. PFC operation is guaranteed through both input current control and output voltage control. Both steady-state and dynamic analyses were conducted. Experimental results for a 1.25 kW, 127 V to 800 V laboratory prototype are presented and discussed.INDEX TERMS High voltage gain, interleaving, interphase transformer cells, power factor correction, PWM rectifier, switched-capacitor.

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“…The ladder cell [10] is an SC topology that is easy to integrate with other converters. It allows the creation of hybrid topologies with lower voltage stress on the components and spontaneous equalization of the voltage division and is used in non-isolated DC-DC converters [11]- [14] and in isolated DC-DC converters [15], [16].…”

Section: Introductionmentioning

confidence: 99%

Full-Bridge ZVS-PWM Hybrid Switched-Capacitor Isolated DC-DC Converter

Alves¹,

Barbi²

2022

Eletrônica de Potência

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This paper presents a new hybrid switchedcapacitor (HSC) isolated DC-DC converter topology generated from the integration of the ladder switching cell with the full-bridge ZVS-PWM converter. This new topology reduces the voltage stress on the switches and other components on the primary side of the transformer to half of the bus voltage, spontaneously equalizes the voltage in the divider capacitors and presents zerovoltage-switching (ZVS) in all switches for a wide load range. The principle of operation, static gain, current stress in the power semiconductors, and commutation analysis are presented in this paper. A theoretical and experimental comparative analysis of the new topology with the TL-NPC converter is also performed. Experimental results with a laboratory prototype with 2 kW rated power, 800 V input voltage, 60 V output voltage and 100 kHz switching frequency show a maximum efficiency of 97.12% for the HSC converter against 96.49% for the TL-NPC converter.

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Switched-Capacitor LLC Resonant DC-DC Converter With Switch Peak Voltage of Vin/2

Cited by 14 publications

References 23 publications

Topology and Formation of Current Source Step Down Resonant Switched Inductor Converters

Topology and Formation of Current Source Step Down Resonant Switched Inductor Converters

Single-Phase Hybrid Switched-Capacitor Interleaved AC-DC Boost Converter

Full-Bridge ZVS-PWM Hybrid Switched-Capacitor Isolated DC-DC Converter

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