A Constant-Frequency High-Voltage Gain Resonant Converter Module With Semiactive Phase-Shifted Voltage Multiplier for MVdc Distribution

Abbasi, Mehdi; Emamalipour, Reza; Cheema, Muhammad Ali Masood; Lam, John

doi:10.1109/jestpe.2021.3088120

Cited by 13 publications

(6 citation statements)

References 29 publications

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“…Other approaches, such as multiplexer rectifier networks, have been used in [82,83], to multiply the output voltage by factors of 2, 3, and 5. Additional voltage multiplier cells can be found in [64,65,67,[84][85][86], all are suffering from the similar issues as the given one in [ 81 ] . Despite their advantages, these converters exhibit low efficiency under light-load conditions, high voltage stress, and require numerous switches.…”

Section: ) Voltage Step-up Llc Resonant Converter Configurationmentioning

confidence: 99%

“…Despite their advantages, these converters exhibit low efficiency under light-load conditions, high voltage stress, and require numerous switches. Furthermore, the topologies presented in [64,65,67,[82][83][84][85][86]. Furthermore [64,65,67,82,83,85,86] feature complex structures, leading to increased costs in practical implementation.…”

Section: ) Voltage Step-up Llc Resonant Converter Configurationmentioning

confidence: 99%

“…Furthermore, the topologies presented in [64,65,67,[82][83][84][85][86]. Furthermore [64,65,67,82,83,85,86] feature complex structures, leading to increased costs in practical implementation. Fig.…”

Section: ) Voltage Step-up Llc Resonant Converter Configurationmentioning

confidence: 99%

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Application-Oriented Review of the LLC-Based Resonant Converters

Shahsevani,

Beiranvand

2024

IEEE Access

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The LLC resonant converter is a widely utilized power electronics converter, due to its numerous industrial and domestic applications. This converter offers some advantages such as soft-switching operation of all switches, high efficiency, high power density, low voltage stress, minimal electromagnetic interference (EMI) noise, input/output isolation, wide input/output voltage range, and reliable and good performance under the wide load variation ranges, as well as good light-load operation. However, this converter has certain limitations, which can be addressed to enhance its operation and efficiency. This paper provides an in-depth review and comparison of various LLC-based resonant converter configurations, focusing on their operational principles, mathematical analysis, control methods, and some practical applications including electric vehicle chargers, TV power supplies, LED drivers, photovoltaic cells, HVDC production, fuel cells, and wireless power transfer applications. By examining the strengths and weaknesses of the different LLC resonant converter designs, this study aims to contribute to the ongoing research efforts in improving the performance and efficiency of this important power electronics converter. INDEX TERMS DC-DC power conversion, LLC resonant converter, resonant power conversion.

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Section: ) Voltage Step-up Llc Resonant Converter Configurationmentioning

confidence: 99%

Section: ) Voltage Step-up Llc Resonant Converter Configurationmentioning

confidence: 99%

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Application-Oriented Review of the LLC-Based Resonant Converters

Shahsevani,

Beiranvand

2024

IEEE Access

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“…Moreover, system stability can be improved with higher control frequency and minor digital control delay with Silicon Carbide (SiC) MOSFET-based high-frequency converters. 10kV SiC MOSFET-based converters have become attractive for the asynchronous PCS with the advancements in Wide Bandgap Device (WBD) technology [6]- [10].…”

Section: Introductionmentioning

confidence: 99%

Fault-Tolerant Control and Isolation Method for NPC-Based AFEC Using Series-Connected 10kV SiC MOSFETs

2022

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Power Conditioning Systems (PCS) based on three-level converters with series-connected 10kV SiC MOSFETs have gained popularity for medium voltage applications with the increase in distributed energy sources. With the use of Silicon Carbide (SiC), a wide bandgap semiconductor composed of Silicon (Si) and Carbon (C), MOSFET increases in power electronics application due to higher switching frequency operations. A high switching frequency such as 10 kHz or more leads to a reduction in magnetic components' size and the PCS structure's size. Therefore, the smaller, modular, and lightweight PCS can be attained for micro-grid integration, EV charging, or high inertia-dominated power grid applications. The three-level NPC (3L-NPC) inverter using series-connected 10kV SiC MOSFET is a suitable topology for coupling the PCS with the medium-voltage utility grid. The converter's pole sustainability increases with the two series-connected switches, yet the switches are still sensitive and prone to malfunction under various environmental and mechanical causes. Therefore, a meticulous fault isolation and coordination design may be necessary for the front-end converter for possible switch faults in the converter poles. A well-designed fault-tolerant controller may sustain the converter operation under fault conditions while protecting the healthy parts of the converter. Besides, it minimizes the harmful effects of fault on the grid side and increases the system availability. This paper analyzes short and open circuit switch faults that might occur in the PCS. Accordingly, a fault-tolerant method and a fault isolation method are proposed. The proposed methods are verified with Saber™ and the Real-Time Digital Simulator simulation platforms.

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“…Also, the achievable output voltages by [5], [11], [14]- [17], [24], [50]- [52], which are roughly twice the abovementioned LLC based resonant converters due to their half or full bridge output rectifiers, are still low for lots of applications. On the other hand, although using voltage quadrupler rectifier configuration [2], [6], [20], [53], [54] increases the converter voltage gain and output voltage values, but these values are still low for some applications and we need more improvements.…”

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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A Constant-Frequency High-Voltage Gain Resonant Converter Module With Semiactive Phase-Shifted Voltage Multiplier for MVdc Distribution

Cited by 13 publications

References 29 publications

Application-Oriented Review of the LLC-Based Resonant Converters

Application-Oriented Review of the LLC-Based Resonant Converters

Fault-Tolerant Control and Isolation Method for NPC-Based AFEC Using Series-Connected 10kV SiC MOSFETs

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

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