Choose an application

• Reference Manager
• EndNote
• RefWorks (Direct export to RefWorks)

This book provides a comprehensive review and classification for dual active bridge DC-DC converters. Based on the unified topology architecture of the dual active bridge DC-DC converters, the topologies derivation law is studied and new converter topologies are deducted correspondingly. Several novel converters are provided to illustrate different topology modification methods, including modified IO types, modified active bridges, modified transformers, adding auxiliary high-frequency networks, and modular topology structure. Meanwhile, the control optimization and the parameter design of the novel converters are also investigated.

Electric current converters. --- Power electronics. --- Power Electronics.

Choose an application

• Reference Manager
• EndNote
• RefWorks (Direct export to RefWorks)

This work aims to reconstruct the current emitted by an electrospray thruster using com-
puted tomography, a technique that enables detailed, cross-sectional imaging of the emission
pattern. Electrospray thrusters, known for their efficiency in space propulsion, require precise
characterization of their emission profiles to optimize performance.
An experimental setup was developed featuring ATHENA, an electrospray thruster de-
signed at ienai SPACE, along with a tomography assembly that includes a wire collector and
two motion stages: linear and rotary. This configuration allows for precise scanning of the
thruster’s emission profile.
To facilitate the reconstruction process, MATLAB codes were developed to simulate
the emission patterns under various conditions. These simulations played a crucial role in
visualizing expected outcomes and optimizing experimental parameters, such as the distance
between the wire and the thruster, as well as the number of steps required for accurate data
collection. Data was generated across voltage levels ranging from 700 V to 1300 V, which
was used to create graphical representations of current intensity as a function of the stages’
positions, known as sinograms. These sinograms were then processed using the inverse Radon
transform to reconstruct the emission pattern as an image.
The resulting images aligned with the simulation predictions, and revealed non-uniform
emission across the thruster. This non-uniformity, although expected due to manufacturing
tolerances, provides valuable insights into the thruster’s performance characteristics. The
detailed analysis of these images suggests that certain regions of the thruster may require
design modifications to improve emission uniformity.

Propulsion --- Electrospray --- Satellites --- Computed Tomography --- Current Emission --- Radon Transform --- Ingénierie, informatique & technologie > Ingénierie aérospatiale

Choose an application

• Reference Manager
• EndNote
• RefWorks (Direct export to RefWorks)

This book provides the potential advantages of adaptive impedance converters in different applications, such as power quality compensations, AC/DC microgrids, co-phase railway traction supply systems, and underwater electroacoustic transduction systems. In these applications, the adaptive impedance converter models, topologies, and control methods are introduced in this book. Adaptive impedance converters are designed to transform the impedance of an electronic system to optimize its performance. The adaptive impedance converter is typically implemented using passive and active electronic components to achieve impedance transformation. The main advantage of adaptive impedance converters is their ability to dynamically adjust the impedance to optimize system performance, which can help improve signal quality, reduce interference, and minimize power losses. Whether it is passive based adaptive impedance converters and active adaptive impedance, they both can applied into different applications including distribution system, renewable energy integration, AC/DC microgrids, traction supply system, and power amplifiers to achieve good performances and ensure efficient power transfer. The passive-based adaptive impedance converters can effectively reduce the converter rating and power loss, maintaining a large operational range. The active adaptive impedance can change its impedance varying with frequency, load conditions, or other factors to match the impedance of the source or load, providing efficient power transfer and minimizing signal reflections. The target audience of this book is the research scholars (including master’s and Ph.D. students) in power electronics and electrical engineer.

Power electronics. --- Renewable energy sources. --- Electronics. --- Power Electronics. --- Renewable Energy. --- Electronics and Microelectronics, Instrumentation. --- Electric current converters. --- Impedance (Electricity)

Choose an application

• Reference Manager
• EndNote
• RefWorks (Direct export to RefWorks)

Ressource génétique --- genetic resources --- Conservation des ressources --- Resource conservation --- Plante --- plants --- duplicates available --- France --- book reviews --- current periodical --- ethnobotany --- general botany --- history of botany --- Human-plant relationships

Choose an application

• Reference Manager
• EndNote
• RefWorks (Direct export to RefWorks)

This thesis focuses on a specific wind-energy-powered fast-chargers supported by a battery energy storage system project in Luxembourg. The main objective is to address the technical, economic and legal feasibility of the project. Furthermore, the battery is studied for overcoming negative monthly spot market price periods with the aim of temporarily storing the wind farm production to generate revenue at a later date.

wind turbines --- direct current fast-chargers --- battery energy storage system --- optimisation problem --- Technical feasibility --- Economic feasibility --- Legal feasibility --- Luxembourg --- Ingénierie, informatique & technologie > Energie