Now showing items 1-10 of 390
An Efficient Switch Model for Simulating Large Power Systems with Many Power Converters
Frequent matrix factorizations due to power electronic switch commutations are computationally expensive. This paper addresses this burden by treating power electronic switches as dependant sources instead of time-varying ...
Performance Studies for a Diakoptics-based Partitioning Approach for Power System Simulation
Performance studies of partitioned power system simulations on multicore computer are presented. A partitioning approach developed by the authors was used to speed up the simulation of a shipboard power system. The system ...
Hydrodynamic bearing applications of micro-electro-mechanical systems
Microdynamical systems have been studied for a number of years, with concentration on sensors and, more recently, actuators. Only limited work has been completed on integrating microdynamical components into systems that ...
Kinetic Energy Technology
The Strategic Defense Initiative Kinetic Energy Weapons (KEW) program incorporates two distinct technologies: missiles (near term) and electromagnetic launchers (long term). Since missiles already have an established ...
Robust compensation of actively controlled bearings for a centrifugal gas compressor
Rotordynamic analysis can be substantially affected by aerodynamic loading effects which have been historically difficult to model or predict analytically. For actively controlled magnetic bearings, such model uncertainty ...
Frequency dependence of partial discharge initiation voltages with embedded electrodes
Partial discharge initiation voltages of a dielectric insulation material exposed to ac voltages show little dependence on frequency in the power frequency range. This results after significant voltage conditioning at the ...
Testing Pulsed Current Conditioning to Benefit Vehicle Battery Performance
(Society of Automotive Engineers, Inc., 1999)
Calorimetric testing of pulsed power conditioning, as an influence on a battery's electrochemical transfer efficiency, is presented. The experiment used two 300 AH (ampere-hour) electric shuttle bus batteries; alternately ...
NIST and the CEIDP - Working Together to Advance Technology
The technology underpinning the electrification and the growth of telecommunications in the United States stimulated a long-term relationship between the Conference on Electrical Insulation and Dielectric Phenomena and the ...