Influence of Parasitic Parameters on DC–DC Converters and Their Method of Suppression in High Frequency Link 35 kV PV Systems

Li, Rui; Shi, Feng; Cai, Xu; Xu, Haibo

doi:10.3390/en12193743

Cited by 3 publications

(4 citation statements)

References 34 publications

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“…Additionally, the resonant current on primary side has to be greater than zero at the beginning of dead time to overcharge parasitic capacitances of switches and transformer. Similar analyses are completed in [10,18,19] for different resonant converters. The equivalent circuit during the period of dead time is illustrated in Figure 4.…”

Section: Principles Of Operationmentioning

confidence: 97%

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Effective Design Methodology of CLLC Resonant Converter Based on the Minimal Area Product of High-Frequency Transformer

Bartecka,

Kłos,

Paska

2023

Energies

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In DC microgrids, CLLC topology is commonly applied for battery integration. It provides galvanic separation, the ability to integrate a high-frequency transformer into the resonance circuit, and the ability to operate in a wide range of voltage. Moreover, it assures zero voltage switching conditions for all switches and zero current switching conditions for secondary side switches, which enables obtaining high efficiency. This paper presents a clear and effective approach to design a methodology for a CLLC DC/DC converter, especially a resonant tank. High-frequency transformer is fully integrated in a resonant tank. Its size is minimal and based on area product parameter Ap. An equivalent scheme for first harmonic approximation analysis is presented with inclusion of parasitic elements. Based on it, the analytical formulas are provided, which enable graphical determination of working characteristics. It was proved that the model increases the accuracy of the results. The conditions of ZVS and maximal magnetizing inductance are established, including parasitic capacitances of secondary side switches and transformer parasitic capacitances. Based on the proposed design methodology, as the proof of concept, a small-power prototype with a GaN transistor was built operating at 364 kHz. Converter losses were determined through analytical expressions and compared with the experimental and simulation results.

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Section: Principles Of Operationmentioning

confidence: 97%

“…The scheme in Figure 2 is the most commonly used. However, it is known that the influence of parasitic components can play a significant role in operation principles of the converter [18]. In Figure 3, a new modified equivalent scheme is proposed, including parasitic elements.…”

Section: Fha Circuit Scheme Equivalentmentioning

confidence: 99%

Effective Design Methodology of CLLC Resonant Converter Based on the Minimal Area Product of High-Frequency Transformer

Bartecka,

Kłos,

Paska

2023

Energies

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“…Converter modeling is most important for analyzing its performance. In the existing literatures, 22‐26 authors have analyzed the converter with state space modeling by considering different switching sequence. In Ref.…”

Section: Introductionmentioning

confidence: 99%

“…22, state space averaging technique is used to model the converter, whereas in Refs. 23‐26, parasitic model is used for the analysis of converter in which practical model of switches and passive elements are considered.…”

Section: Introductionmentioning

confidence: 99%

Design and implementation of single switch control DC ‐ DC converter with wide input variation in automotive LED lighting

Sureshkumar

Gunabalan

2021

Int Trans Electr Energ Syst

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Summary In the emerging automobile fields, head light plays a vital role in the aspect of safety. Only a fraction of total power from the battery should be utilized for its operation. In conventional lighting technologies, head light consumes high power, less efficient and also struggles for the variation of input voltage. This paper proposes a simple modified half bridge converter (MHBC) design for automotive lighting applications. The converter has two switches in which duty cycle of one switch is controlled and other one remains fixed at a particular duty cycle. This reduces the control complexity. In addition, the converter is capable of operating in buck and boost mode which is much essential for source variation. The parasitic state space model of the converter is derived using state averaging technique, which helps in obtaining the realistic operation of the converter. Stability analysis is carried out for the proposed model, which is in line with the practical model. The obtained frequency response curve helps in calculating the stable operating range of the duty cycle. The conduction and switching losses are calculated to get the efficiency of the system. The simulation of the proposed system is performed in PSIM software and a prototype model is realized with 21 W power rating. The performance of the converter is tested under wide input voltage variation (10 to 50 V) for a 30 V/0.7A light‐emitting diode string.

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A Synchronous Rectifier Control Scheme to Realize ZVS Considering the Secondary Parasitic Capacitance in LLC Resonant Converter

Zhou

Gao

et al. 2022

2022 IEEE International Power Electronics and Application Conference and Exposition (PEAC)

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Influence of Parasitic Parameters on DC–DC Converters and Their Method of Suppression in High Frequency Link 35 kV PV Systems

Cited by 3 publications

References 34 publications

Effective Design Methodology of CLLC Resonant Converter Based on the Minimal Area Product of High-Frequency Transformer

Effective Design Methodology of CLLC Resonant Converter Based on the Minimal Area Product of High-Frequency Transformer

Design and implementation of single switch control DC ‐ DC converter with wide input variation in automotive LED lighting

A Synchronous Rectifier Control Scheme to Realize ZVS Considering the Secondary Parasitic Capacitance in LLC Resonant Converter

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