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Showing 1 to 19 of 19 for “"LLC converter"”.
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Full Bridge LLC Converter Secondary Architecture Study for Photovoltaic Application
… drawing increased attention in research. Microconverter is one of the PCS that can support versatile applications in various power line architectures. This work focuses on the comparison of circuit secondary side architectures for LLC converter for microconverter application. As the research …
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Optimal Design of MHz LLC Converter for 48V Bus Converter Application
… bus architecture employing the 48V bus converter is one of the most popular power architecture. 48V to 12V bus converter has wide applications in telecommunications, networks, aerospace, and military, etc. However, today's state of the art products has low power rating or power density …
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Variable Ratio Matrix Transformer based LLC Converter for Two-Stage Low-Voltage DC-DC Converter Efficiency Improvement
The low-voltage dc-dc converter (LDC) in electrical vehicles (EVs) is to convert high dc voltage (270V~430V) from traction battery to low dc voltage (12.5V~15.5V) for the vehicle auxiliary systems. Galvanic isolation is required in the LDC due to safety considerations. Three challenges exist in the …
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TECHNOLOGIES TO IMPROVE GAN-BASED LLC RESONANT CONVERTER FOR WIDE INPUT VOLTAGE, HIGH OUTPUT CURRENT AC-DC AND DC-DC APPLICATIONS
… most popular industrial applications. Resonant converters, among a variety of mainstream power converter topologies, are receiving more and more attention owing to their features of high efficiency and high power density. This thesis discusses several challenges to apply LLC resonant converter …
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LLC Resonant Converter Based Single-stage Inverter with Multi-resonant Branches
… variable frequency modulation (VFM) based on LLC resonant converter. And LLC converter is a common topology of dc/dc conversion. LLC resonant converter can achieve high efficiency and soft-switching performance. Since the dc gain curve of the single-resonant LLC converter is flat when the …
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Microcontroller (MCU) Based Simplified Optimal Trajectory Control (SOTC) for High-Frequency LLC Resonant Converters
The LLC resonant converter has been widely used as a DC-DC converter due to its high efficiency, high power density and hold-up capability in power supplies for communication systems, computers and consumer electronics. Use of the high-frequency LLC converter has also been increasing in recent …
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Accurate Small-Signal Modeling for Resonant Converters
In comparison with PWM converters, resonant converters are gaining increasing popularity for cases in which efficiency and power density are at a premium. However, the lack of an accurate small-signal model has become an impediment to performance optimization. Many modeling attempts have been made …
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Design Optimizations of LLC Resonant Converters with Planar Matrix Transformers
LLC resonant converters have been a popular choice for DC-DC converters due to their high efficiency, high power density, and hold-up capability in power supplies for communication systems, datacenters, consumer electronics, and automobiles. With the rapid development of wide-bandgap devices and …
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High-Efficiency and High-Frequency Resonant Converter Based Single-Stage Soft-Switching Isolated Inverter Design and Optimization with Gallium-Nitride (GaN)
… is limited. People either utilize PWM based converter as dc-rectified sine stage with duty cycle adjustment or apply SRC or LLC resonant converter for better soft switching characteristics. For PWM based converter, hard switching restricts the overall inverter efficiency, while for SRC/LLC, …
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High Efficiency High Power Density Gan Based Power Supply Unit (PSU) for Data Center Application
… 3-phase supply to 380VDC. An isolated DC-DC LLC converter employing a planar integrated matrix transformer steps down the 380VDC to 48VDC for further distribution in the server rack. The rectifier switches and the primary switches in the LLC are GaN MOSFETs. The analytical loss and volume …
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Power Architectures and Design for Next Generation Microprocessors
… solutions on the architecture level, down to the converter level, is inevitable. Recently, data centers have replaced the 12V DC server rack distribution with a 48V DC distribution, producing a significant overall system efficiency improvement. However, 48V rack architecture raises significant …
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Design and Integration Techniques for High-Frequency PCB-Based Magnetics in Resonant Converters
In today's industrial power converters, converter reliability is essential, and converter topologies are well-established. Without a doubt, the power electronic industry continues to seek efficient power delivery and high power density. Resonant converters, especially LLC converters, have been …
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Optimization of LLC Resonant Converters: State-trajectory Control and PCB based Magnetics
… correction (PFC) circuit and isolated DC/DC converter. Isolated DC/DC converter occupies more than half of the volume in an off-line power supply and takes the most control responsibilities, so isolated DC/DC converter is the key aspect to improve the overall performance and reduce the total …
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High Efficiency DC-DC Converter for EV Battery Charger Using Hybrid Resonant and PWM Technique
… (PHEVs).This thesis focuses on the DC-DC converter for high voltage battery charger and is divided into four chapters. The background related to EV battery charger is introduced, and the topologies of isolated DC-DC converter possibly applied in battery charge are sketched in Chapter 1. …
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Transformer Shielding Technique for Common Mode Noise Reduction in Switch Mode Power Supplies
… severe EMI noise issue. In a typical front-end converter, the EMI filter usually occupies 1/3 to 1/4 volume of total converter. Hence, reducing the EMI noise of power converter can help reduce the volume of EMI filter and improving the total power density of the converter. For off-line switch …
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Adaptable power conversion for grid and microgrid applications
… devices and systems. Increasingly, power converters need to operate over widely varying operating conditions (voltage, current and power level), which can degrade their performance. In many applications, power converters are also being interconnected to form power systems. This is …
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PCB-Based Heterogeneous Integration of LLC Converters
… correction (PFC) circuit, and an isolated DC-DC converter. For off-line power supply, an isolated DC-DC converter offers isolation and output voltage adjustment. For an off-line power supply, it takes up significantly more room than the rest; thus, an isolated DC-DC converter is essential for …
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EMI Noise Reduction Techniques for High Frequency Power Converters
… severe EMI noise issue. In a typical front-end converter, the EMI filter usually occupies 1/3 to 1/4 volume of total converter. Hence, reducing the EMI noise of power converter can help reduce the volume of EMI filter and improving the total power density of the converter. The EMI noise can be …
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Integration Challenges In High Power Density Wide Bandgap Based Circuits for Transportation Applications
… higher efficiency, higher power density power converters are desired. The new generation of wide bandgap (WBG) power semiconductor devices pushs the switching frequency and output power of the electric system in transportation to a higher level thanks to their higher blocking voltage, higher …