Comparison of boost and LLC converter and active clamp isolated full‐bridge boost converter for photovoltaic DC system

Liu, Jiye; Zheng, Zedong; Wang, Kui; Li, Yong Dong

doi:10.1049/joe.2018.8507

Cited by 10 publications

(5 citation statements)

References 8 publications

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“…Subsequently, M 7 is turned on and the circuit assumes the same operation as in the previous half‐cycle. The voltage on the transformer reverses its polarity to exercise flux balance 6,7 …”

Section: Architecture Of the Proposed Systemmentioning

confidence: 99%

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Standalone electric vehicle charging station using an isolated bidirectional converter with snubber

2021

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The rise of green technologies in transportation requires electric vehicles (EV) as a prominent solution for reducing greenhouse gas emissions. An off‐grid EV charging station plays a significant role in remote regions leading to increased use of EVs. Solar energy promises to be the best solution due to its abundance and simple installation. As solar energy is not constant over a 24‐hour period, there is a need for an energy storage unit (ESU) along with a photovoltaic array. In this paper, we present an efficient design approach that uses a fast‐charging station with a maximum power point tracking boost converter, a bidirectional DC‐DC converter with a snubber circuit, and ESU. The power electronic converters with an active snubber and two capacitive‐diode snubbers act as the energy sources that interface with the ESU. The snubber circuits achieve near zero voltage switching and zero current switching for the converter, thus improving overall efficiency. ESU meets the energy demand for EVs when there is insufficient generated solar energy. On the other hand, during the excess generation of solar energy, ESU utilizes this energy to develop an optimal power management system. This results in a green, reliable, and efficient off‐grid EV charging station. The proposed method is validated using the MATLAB/Simulink environment to verify system performance.

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Section: Architecture Of the Proposed Systemmentioning

confidence: 99%

“…Inductors are not commercially available readymade for these power levels and they must be designed for this application. The maximum discharging current is assumed to be 2 A 7 . The allowed ripple is about 10% of the maximum discharging current.…”

Section: Architecture Of the Proposed Systemmentioning

confidence: 99%

Standalone electric vehicle charging station using an isolated bidirectional converter with snubber

2021

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“…Given the energy crisis, photovoltaic power generation has been widely used and industrialized, due to its environmental-friendliness [45] . As an essential part of the photovoltaic system, the photovoltaic grid-connected inverter is the key to improving the efficiency and reliability of the whole photovoltaic power generation system, extend its lifespan and reduce economic costs [46][47] .…”

Section: Llc Resonant Converter In Photovoltaic Systemsmentioning

confidence: 99%

LLC resonant converter topologies and industrial applications — A review

Zeng

Zhang

et al. 2020

Chin. J. Electr. Eng.

119

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Owing to the advantages of high efficiency, high energy density, electrical isolation, low electromagnetic interference (EMI) and harmonic pollution, magnetic integration, wide output ranges, low voltage stress, and high operation frequency, the LLC resonant converters are widely used in various sectors of the electronics-based industries. The history and development of the LLC resonant converters are presented, their advantages are analyzed, three of the most popular LLC resonant converter topologies with detailed assessments of their strengths and drawbacks are elaborated. Furthermore, an important piece of research on the industrial applications of the LLC resonant converters is conducted, mainly including electric vehicle (EV) charging, photovoltaic systems, and light emitting diode (LED) lighting drivers and liquid crystal display (LCD) TV power supplies. Finally, the future evolution of the LLC resonant converter technology is discussed.

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“…Another one of the most widely used converters are LLCbased resonant converters, which have received a lot of attention from researchers and industry in recent years due to their good features. These resonant converters have low electromagnetic interference (EMI), and they can provide ZVS condition for primary MOSFETs and zero current switching (ZCS) turn-off condition for output diodes when they operate between series-resonance and parallelresonance frequencies [36], [37]. Moreover, by paralleling small capacitors to drain-sources of MOSFETs, their turnoff switching losses can be reduced [38], [39].…”

Section: Introductionmentioning

confidence: 99%

A High Step-Up Interleaved Current-Fed Resonant Converter for High-Voltage Applications

et al. 2022

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A current-fed LLC resonant converter is proposed for high-voltage and high-power applications. Here, a two-phase interleaved structure is used in the input stage under the continuous conduction mode (CCM) to effectively reduce the input current and output voltage ripple values and the input filter and the output capacitors volumes. Due to the expandable structure and high voltage gain, the proposed configuration is suitable for high voltage applications since low voltage stresses are applied across its components. In fact, voltage stresses across the power semiconductors, i.e., MOSFETs and output diodes, along with the output capacitors, are almost one-third of the output voltage in the implemented three-stage configuration of the proposed converter. Here, the switching frequency is chosen close to, but less than, the converter series resonant frequency to reduce its different components' current stresses and perform softswitching operation for all power devices under wide input voltage and output power variations. Therefore, conduction and switching losses, and EMI noises are effectively reduced. Consequently, efficiency is improved and high-frequency operation is possible, which reduces the volume of passive components to achieve high-power density. The given topology is thoroughly analyzed mathematically. Also, a 1 kW prototype converter has been implemented to validate the given simulations and analyses. Here, wide input voltage (100 V-200 V) and output power (100 W-1000 W) variations are applied, and an asymmetric pulse width modulation (APWM) technique is used at 143 kHz switching frequency to regulate the output voltage at 1 kV. The obtained maximum efficiency value is 95.3%.INDEX TERMS Asymmetric pulse width modulation (APWM), current-fed converter, interleaved technique, LLC resonant converter, multi-winding transformer.

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Comparison of boost and LLC converter and active clamp isolated full‐bridge boost converter for photovoltaic DC system

Cited by 10 publications

References 8 publications

Standalone electric vehicle charging station using an isolated bidirectional converter with snubber

Standalone electric vehicle charging station using an isolated bidirectional converter with snubber

LLC resonant converter topologies and industrial applications — A review

A High Step-Up Interleaved Current-Fed Resonant Converter for High-Voltage Applications

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