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Showing 1 to 20 of 38 for “"Zero-Current Switching"”.
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Design of zero-current switching DC-DC buck converter
This project presents a zero-current switching (ZCS) DC-DC buck converter design, simulation and application. The converter control uses with ZCS technique to decrease the switching losses. Comparing to conventional buck converter, resonant buck converter includes a resonant tank equipped with …
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Digital-Based Zero-Current Switching (ZCS) Control Schemes for Three-Level Boost Power-Factor Correction (PFC) Converter
… been widely used for the purpose. In order to concurrently achieve high efficiency and low-cost system in the PFC stage, zero-current switching (ZCS) control schemes are highly employed in control principles. Representative schemes are discontinuous conduction mode (DCM) and critical conduction …
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Design and Control of a Compact 7.2 kW GaN-Based Bidirectional Isolated On-Board Charger (OBC)
… three major contributions: First, a novel Zero Crossing Voltage Control (ZCVC) strategy for Power Factor Correction (PFC) applications is developed. This approach ensures a consistent sinusoidal AC current, eliminates second harmonic distortions without notch filters, and achieves stability …
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Magamp post-regulator applied to a quasi-resonant converter and magamp operation under extreme load condition in a PWM converter
… such as shutdown of output, foldback of output current and very light load (discontinuous operation). The other issue considered concerns with magamp post regulation for a quasi-resonant converter. A magamp circuit is proposed, designed and tested for a zero current switching quasi-resonant …
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Controlling the Vienna rectifier using a simplified space vector pulse width modulation technique
… to reduce the computational burden, the switching losses and the Total-Harmonic-Distortion (THD). Furthermore, the robustness of this modulation technique is tested under various faults through a 70 kW MATLAB/Simulink model and the results are validated through 1.2 kW prototype. The …
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Analysis and design of high power density resonant switched-capacitor converters
… A single inductor is utilized to achieve zero current switching of all transistors, which allows for high switching frequency and high conversion efficiency. A split-phase control scheme is used in order to eliminate the current transients associated with the Dickson SC converter and the …
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LLC Resonant Converter Based Single-stage Inverter with Multi-resonant Branches
… converter can achieve high efficiency and soft-switching performance. Since the dc gain curve of the single-resonant LLC converter is flat when the switching frequency is larger than the resonant frequency, namely fs>fr, an additional L-C series resonant branch is paralleled to the original …
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Topology and analysis in power conversion and inversion
… dc-to-ac inverters are discussed. A number of zero-current switching quasi-resonant inverter topologies are derived. Schemes that permit these topologies to handle reactive loads are identified.
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High-frequency quasi-resonant converter techniques
… techniques to reduce or eliminate the switching stresses and switching losses in switching-mode power conversion circuits are developed: the zero-current switching technique and the zero-voltage switching technique. Based on these two techniques two new families of quasi-resonant …
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A Novel Auxiliary Resonant Snubber Inverter Using Wide Bandgap Devices
… wide bandgap (WBG) device technology and high switching frequency to reduce passive filter size thus further shrink overall space. While still maintaining decent power conversion efficiency and low electromagnetic interference (EMI) with higher switching frequency, soft-switching needs to be …
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Low-Frequency Series Loaded Resonant Inverter Characterization
… systems. Resonant inverter topologies exhibit zero current switching (ZCS); hence, eliminate switching losses leading to higher efficiencies in comparison to hard switched topologies.</p> <p>Resonant inverters suffer severe limitations mainly attributed to a load dependent resonant frequency. …
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Design of a 405/430 kHz, 100 kW Transformer with Medium Voltage Insulation Sheets
… must be able to handle higher voltage and current ratings at higher percentages of efficiency while also maintaining low cost and a compact footprint. To meet such demands, medium-voltage resonant converters have been favored by researchers for their ability to operate at higher switching …
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High-frequency off-line power conversion using quasi-resonant and multi-resonant techniques
… power conversion technologies, the zero-current-switching (ZCS) and zero-voltage-switching (ZVS) quasi-resonant techniques, and the zero-voltage-switching multi-resonant technique, are evaluated for high-frequency, off-line applications. The study is performed with emphasis on the …
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Energy Harvesting from Elliptical Machines: DC-DC Converter Design Using SEPIC Topology
… converter design is based on a non-isolated, PWM-switching single-ended primary inductor converter (SEPIC) topology, as opposed to the resonant zero-current switching/zero-voltage switching (ZCS/ZVS) topology-based off-the-shelf DC-DC converter that the previous project utilized, which had poor …
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High efficiency resonant dc/dc converter for solar power applications
… compression network to provide simultaneous zero voltage switching and near zero current switching across a wide range of input voltage, output voltage and power level. The resistance compression network maintains desired current waveforms over a wide range of voltage operating conditions. …
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Soft-Switching, Interleaved Inverter for High Density Applications
… the latest transistor technology to push switching frequency to shrink passive filter size. Furthermore, while high efficiency is an important thermal handling strategy, it must be weighed against increases in component size. Google's Little Box Challenge shone light on these challenges in …
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A High-efficiency Isolated Hybrid Series Resonant Microconverter for Photovoltaic Applications
… With this topology, the converter can achieve zero-voltage switching (ZVS) and/or zero-current switching (ZCS) of the primary side MOSFETs, ZCS and/or ZVS of the secondary side MOSFETs and ZCS of output diodes under all operational conditions. The experimental results based on a 300 W prototype …
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Unified Steady-state Computer Aided Model For Soft-switching DC-DC Converters
… The majority of these circuits, such as soft switching cells, contain complicated modes of operations that require the Pspice simulation to run for a long time and, finally, it may not reach a convergent solution for these kinds of circuits. Also, there is a need for an educational tool that …
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Power electronic transformers for AC-AC and AC-DC conversion with reduced number of switches
… strategies proposed in this work achieve nearly Zero Current Switching (ZCS) for these two primary switches. In the proposed three-phase AC to AC Power Electronic Transformer, a Matrix Converter (MC) is employed on the secondary side of the transformer. Matrix converter with nine four-quadrant …
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Topology Investigation and System Optimization of Resonant Converters
… power density, low EMI, easy startup and over current protection. LLC resonant converters can achieve zero-voltage-switching (ZVS) for primary side devices and zero-current-switching (ZCS) for the secondary side rectifiers. The switching loss is minimized. LLC is very attractive to overcome the …
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