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Showing 1 to 19 of 19 for “"more electric aircraft"”.
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Overcoming electro-thermal barriers to achieve extreme performance power conversion for more electric aircraft
… ventures, has demonstrated growing interest in more electric aircraft (MEA) - flight vehicles where propulsion is partially or totally supplied by electric motors. While hybrid or turbo-electric MEA concepts would still rely on a jet engine power plant to provide electrical power to these …
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A flying capacitor multilevel dual-active bridge converter for interfacing high voltage in more-electric aircraft
More-electric aircraft (MEA) replace traditional mechanical and hydraulic subsystems with electrically powered equivalents, improving system-level power density, reliability, and maintainability. As MEA architectures approach the megawatt scale, both power generation and distribution voltage levels …
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A Method for Evaluating Aircraft Electric Power System Sizing and Failure Resiliency
<p>With the More Electric Aircraft paradigm, commercial commuter aircraft are increasing the size and complexity of electrical power systems by increasing the number of electrical loads. With this increase in complexity comes a need to analyze electrical power systems using new tools. The Hybrid …
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High Power Density and High Temperature Converter Design for Transportation Applications
… by modern transportation applications like electrical vehicles and more electric aircraft where the space and carrier capability is limited. However, there are several challenges related to transportation applications such as fault tolerance for safety concern, high temperature operation in …
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Digital Generator Control Unit for Synchronous Brushless Generator
… frequency power system, a preferred candidate in More Electric Aircraft (MEA), becomes a big challenge. Compared with conventional analog GCU, digital GCU is a future trend due to the properties such as easy tuning, modification and no aging. Control approaches adopted in the new GCU design is …
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The Development and Packaging of a High-Density, Three-Phase, Silicon Carbide (SiC) Motor Drive
… to industrial applications that include hybrid, electric, and plug-in electric vehicles and more electric aircraft. To achieve the increase in energy efficiency and significant reduction in size and mass of these systems, power semiconductor device manufacturers are developing silicon carbide …
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Mission-Integrated Synthesis/Design Optimization of Aerospace Subsystems under Transient Conditions
… the thermodynamic behavior of a military aircraft have been implemented by the Air Force Research Lab (AFRL) and other Integrated Vehicle Energy Technology Demonstration (INVENT) contributors into a cohesive, adaptable, dynamic aircraft simulation program in Mathworks' Simulink®. The …
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A framework for dynamic characterization and short-term thermal capability assessment of electric machines and inverters in motor drives
The need for more powerful and compact motor drives is growing, especially in the fields of automotive traction and more-electric aircraft systems. These applications have peak-duty aspects that intermittently stress the drive. To account for this stress, conventional methods dating back to the …
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More Electric Systems Architecture Effect on Business Jet Performance
<p>A more-electric systems architecture, using current state of the art components, is proposed for the business jet Dassault Falcon 2000. A model of the existing aircraft, both of its overall flying characteristics and performance and of its detail systems layout, is created using Pacelab APDc and …
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Certification challenges for emerging technologies in aviation
… seen a shift in traditional architectures of an aircraft. The desire for aircraft to be lighter, more efficient, quieter, faster, and cheaper has driven trends across the industry. These trends look for ways to accomplish what many other industries such as automotive have done which is a complete …
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Finite Element Analysis of a Shaft-Rotor System
… Air Force is in the process of developing a more electric aircraft. The development of an aircraft Integrated Power Unit and an Internal Starter/Generator will be instrumental in producing sufficient electrical power to run all non propulsive systems. Iron-cobalt alloys, such as Hiperco …
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A hierarchical control strategy for aircraft thermal systems
Aircraft systems present an interesting control problem given the fact that there exist multiple objectives, actuators, and physical dependencies throughout the system. For decades the onboard systems of aircraft have worked in isolation seeking to achieve their goals while giving little to no …
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Comprehensive loss optimization of induction motor drives
… ranging from automotive traction to more-electric aircraft, which have widely varying speed, torque and power requirements. Advances in control technology have enabled the development of various sophisticated controllers for motor drives aimed at performance enhancement. Substantial …
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Design of Extreme Efficiency Active Rectifier for More-electric Aircrafts
The More-electric aircraft (MEA) concept has been raised since 1990s in order to increase fuel economy and reduce environmental impact of aircrafts. The fundamental of the concept is to replace pneumatic, hydraulic and mechanical systems in conventional aircrafts with its electrical equivalent that …
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Control Strategies for Minimizing the DC-Link Capacitance in Power Electronics Converters for Aircraft Electrical Power Systems
In more electric aircraft (MEA), the electrical power system (EPS) consists of AC and DC power distribution systems to deliver power to various aircraft loads. In main power generation, variable frequency generators (VFGs) generate VF AC supply (380-800Hz 115/230V) to feed frequency insensitive …
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Power electronics implementation of dynamic thermal storage as effective inertia in large energy systems
Modern large energy systems such as electricity grids and electrified transportation encounter increasing processed power in multi-physics domains, such as electrical, mechanical, thermal, and chemical. Although many systems are becoming predominantly electrical dependent, an integrated …
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Subsystem Design in Aircraft Power Distribution Systems using Optimization
… tools for the design of subsystems in a modern aircraft power distribution system. The baseline power distribution system is built around a 270V DC bus. One of the distinguishing features of this power distribution system is the presence of regenerative power from the electrically driven flight …
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PERMANENT MAGNET MULTIPHASE MACHINE MODELING AND CONTROL FOR MV WIND ENERGY APPLICATIONS
… effort has been put into the modelling of electrical machines to provide mathematical models for control purposes. As the power electronics isolate the machine from the grid, the number of phases on both sides no longer needs to be the same, thus allowing for use of multiphase machines. …
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Form-Factor-Constrained, High Power Density, Extreme Efficiency and Modular Power Converters
… enabling a fully modularized design. Furthermore, the implementation issues of modularity are discussed. Although modularizing converters under form factor constraints adds flexibility to the system, it limits the design space by forbidding oversized components. This work studies the …