Results 61 to 70 of about 426,828 (198)

Comparative Study of Hybrid Electric Distributed Propulsion Aircraft Through Multiple Powertrain Component Modeling Approaches

Aerospace
Aircraft design is an ever-expanding field of research. Disruptive aircraft architectures and the long-standing need for fast design processes are the main drivers behind the domain growth.
Baptiste Legrand, Arnaud Gaillard, David Bouquain   +2 more
doaj   +1 more source

High-Power Machines and Starter-Generator Topologies for More Electric Aircraft: A Technology Outlook

IEEE Access, 2020
More electric aircraft (MEA) architectures consist of several subsystems, which must all comply with the settled safety requirements of aerospace applications.
Jonas Kristiansen Noland, Matteo Leandro, Jon Are Suul, Marta Molinas   +3 more
doaj   +1 more source

Decentralised Optimal Controller Design of Variable Frequency Three-Phase Power Electronic Networks Accounting for Sub-System Interactions

IEEE Open Journal of Industry Applications, 2020
Electrification of non-propulsive aircraft systems has resulted in the increased proliferation of power electronics embedded grids on aircraft. Typically, power converters on these networks are optimised locally without consideration to the wider grid ...
David Dewar, Jaime Rohten, Andrea Formentini, Pericle Zanchetta   +3 more
doaj   +1 more source

Time to Breakdown for Type I Motor Winding Insulation Under High‐Frequency High‐Slew‐Rate Square Wave Voltages

High Voltage, EarlyView.
ABSTRACT The emergence of (ultra)wide bandgap ((U)WBG)‐based devices has significantly enhanced performance in high‐frequency switching applications, enabling breakthroughs in electric transportation, aerospace, and renewable energy systems. However, it also presents considerable challenges to insulation systems, such as electric motor winding ...
Easir Arafat, Md Asifur Rahman, Farzana Islam, Mona Ghassemi   +3 more
wiley   +1 more source

Centrifugal Pumping Force in Oil Injection-Based TMS to Cool High-Power Aircraft Electric Motors

Energies
One of the challenges of our age is climate change and the ways in which it affects the Earth’s global ecosystem. To face the problems linked to such an issue, the international community has defined actions aimed at the reduction in greenhouse gas ...
Giuseppe Di Lorenzo, Diego Giuseppe Romano, Antonio Carozza, Antonio Pagano   +3 more
doaj   +1 more source

Chasing the perfida Albione: Anglo‐Italian productivity gap in the late 1930s

The Economic History Review, EarlyView.
Abstract This paper presents new estimates of Anglo‐Italian labour productivity levels in manufacturing in the late 1930s, derived using the standard single‐deflation approach. The findings confirm a substantial productivity gap between Italy and the United Kingdom at the aggregate level, alongside pronounced intersectoral heterogeneity.
Tancredi Salamone
wiley   +1 more source

Cooling of 1 MW Electric Motors through Submerged Oil Impinging Jets for Aeronautical Applications

Aerospace
Electrification of aircraft is a very challenging task as the demand for energy and power is high. While the storage and generation of electrical energy are widely studied due to the limited specific energy and specific power of batteries and fuel cells,
Giuseppe Di Lorenzo, Diego Giuseppe Romano, Antonio Carozza, Antonio Pagano   +3 more
doaj   +1 more source

Pollution Permits and Financing Costs

Journal of Money, Credit and Banking, EarlyView.
Abstract Effective environmental policy should consider how the financiers of polluting firms behave. We study phase III of the EU Emission Trading System. Loan spreads for cap‐and‐trade participants are a function of compliance costs, permit market features, and firms’ strategic actions.
FABIO ANTONIOU, MANTHOS D. DELIS, STEVEN ONGENA, CHRIS TSOUMAS   +3 more
wiley   +1 more source

Optimized Fabrication Process and PD Characteristics of MVDC Multilayer Insulation Cable Systems for Next Generation Wide-Body All-Electric Aircraft

Energies
For wide-body all-electric aircraft (AEA), a high-power-delivery, low-system-mass electric power system (EPS) necessitates advanced cable technologies.
Md Asifur Rahman, Anoy Saha, Mona Ghassemi   +2 more
doaj   +1 more source

Things at Work: How Things Contribute to Performing Work

Journal of Management Studies, EarlyView.
Abstract A crucial question for organizations is what constitutes work performance. While the importance of human competence and motivation to work performance has been established, less well understood is how ‘things’ – such as algorithms, tools, instruments, and raw materials – contribute to work performance.
Jörgen Sandberg, Gloria Dall'Alba, Anna Stephens   +2 more
wiley   +1 more source