A5042462968- Electric Motor Design and Analysis
- Superconducting Materials and Applications
- Magnetic Bearings and Levitation Dynamics
- Magnetic Properties of Alloys
- Advanced DC-DC Converters
- Sensorless Control of Electric Motors
- Wireless Power Transfer Systems
- Global Energy and Sustainability Research
- Tropical and Extratropical Cyclones Research
- Geomagnetism and Paleomagnetism Studies
- Diverse Musicological Studies
- Advancements in Battery Materials
- Control Systems in Engineering
- Fluid Dynamics Simulations and Interactions
- Fluid Dynamics and Vibration Analysis
- Catalysts for Methane Reforming
- Music Technology and Sound Studies
- Silicon Carbide Semiconductor Technologies
- Advanced Electrical Measurement Techniques
- Magneto-Optical Properties and Applications
- Extraction and Separation Processes
- Magnetic and Electromagnetic Effects
- Electric Power Systems and Control
- Multilevel Inverters and Converters
- Ammonia Synthesis and Nitrogen Reduction
Sintex (Czechia)
2014
DXC Technology (Denmark)
2013
Vestas (Denmark)
2005-2006
Electrification of conventionally fired chemical reactors has the potential to reduce CO2 emissions and provide flexible compact heat generation. Here, we describe a disruptive approach fundamental process by integrating an electrically heated catalytic structure directly into steam-methane-reforming (SMR) reactor for hydrogen production. Intimate contact between electric source reaction site drives close thermal equilibrium, increases catalyst utilization, limits unwanted byproduct...
Highly accurate and precise heave decay tests on a sphere with diameter of 300 mm were completed in meticulously designed test setup the wave basin Ocean Coastal Engineering Laboratory at Aalborg University, Denmark. The dedicated to providing rigorous benchmark dataset for numerical model validation. was ballasted half submergence, thereby floating waterline equator when rest calm water. Heave conducted, wherein held stationary dropped from three drop heights: small height, which can be...
Recycling rare earth permanent magnets is becoming an important alternative source of supply raw materials for neodymium-iron-boron (Nd-Fe-B) magnets. This article documents a recycling case-study in which isotropic binder-free magnet powder extracted and recycled from hermetically-sealed rotors. The extraction process detailed, the influence demagnetization-temperature on magnetic performance product studied reported on. Both intrinsic coercivities squareness factor demagnetization curves...
A novel recycling strategy, direct reuse, for rare earth permanent magnets were investigated in this article. Direct reuse uses small, unit-cell (segmented) to replace the normal solid pole configuration, which is not directly reusable due its unique shape and size. The are their standard size, effectively bypasses a number of expensive energy intensive processes recycling. Based on model 3 MW drive wind turbine generator, finite element studies concluded that values average output torque,...
Rare earth permanent magnets can be reused directly as an alternative to traditional recycling methods, in which scrapped are reprocessed into new by undergoing many of the original energy-intensive and expensive production processes. Direct reuse entails using segmented magnet assemblies built several small standard-sized that a number different applications. A central part direct strategy is separate demagnetize heating them Curie temperature. We investigated validity rare evaluating...
The design and construction of an easy-to-use test-rig for permanent magnet couplings is presented. Static torque as a function angular displacement measured through semi-automated test system. capable measuring up to 240 Nm (in increments 0.1 Nm) at step 0.0011 degrees (mechanical). Axial, radial, misalignment can be imposed on the coupling in order study abnormal faulty operating conditions. This also used assess installation tolerances. Measured data stored USB thumb-drive, no additional...
A parametric design optimization routine has been applied to a novel magnetic coupling with improved recyclability. Coupling designs are modeled in 3-D finite element environment, and evaluated by three objectives: pull-out torque, torque density magnet mass, total mass. Magnet outer core thicknesses varied discretely, whereas dimensions air-gap length kept constant. Comparative trends as function of pole number depicted. compromise exist between the objectives, which favoring one might...
Traditionally electrical motors have three phases, but multiphase shown to improve motor performance and efficiency. This paper concentrates about the control algorithm for a six-phase induction with third harmonic current injection. The problem is that typically seventh inverter branch filter inductance needed stabilizing midpoint potential of series connected DC-capacitor link. A new strategy pre-calculates allowed voltage ripple controls accordingly (using two standard phase modules)...
This paper presents the methodology and subsequent findings of a performance-improvement routine that employs automated finite element (FE) analysis to increase torque-per-kilogram-magnet (TPKM) permanent magnet coupling (PMC). The is applied commercially available cylindrical PMC with rectangular magnets (PM), new design discovered which increases TPKM by 15.6%. Furthermore, study repeated using concave/convex-shaped PMs, results in an 57.6%. FE models are validated against experimental...
This paper provides a comprehensive overview of the state art in field permanent magnet biased inductors, (PMBIs). The theoretical benefits PMBIs, operating DC applications, were identified decades ago, late 1950's. Compared with non-biased inductor, 100% linear PMBI, can achieve same inductance and saturation current, while requiring only half core's cross-sectional area or number turns. In practicality, achieving biasing without introducing additional losses, detrimental conditions for...
Permanent magnet couplings are widely used in applications requiring torque to be transmitted through an airgap. The aim of this study is observe and explain the effect radial axial misalignment a 12-pole, cylindrical permanent coupling. Pull-out was measured for two coupling pairs which showed increase 3.1% 3.8%, respectively, at maximum misalignment. When modeled finite element analysis software, produces 3.7% more static pull-out than aligned case. For different distances simulated. An...
A 30° Green Magnet based on permanent NdFeB magnets has been developed and installed in the injection line at ASTRID2 synchrotron light source. The cost efficient design is optimized for a 1 T field length of m using shaped iron poles to surpass required homogeneity. inherent temperature dependence passively compensated below 30 ppm/°C. study potential demagnetization effects performed by irradiation samples placed directly 100 MeV e-beam. high magnet work point was found result enhanced...
Characterization of five accuracy class 0.2 current transformers rated 600 A up to 2500 is done by measurement phase displacement and amplitude error as function frequency current. The test system presented the procedure described. voltage measurements addressed separate on transformer burden (load resistance) are carried using other equipment. This enables an assessment equipment ability. Finally, different with out
Abstract In 1969, the first oil capable of exploitation was discovered on Norwegian Continental Shelf. Being a developed industrialized country and now with an abundance energy, Norway found itself in unique fortunate position. While possesses one-third West European reserves gas, it decided to develop resources at moderate pace. It also became clear that extraction does not necessarily bring revenues only, but may disrupt balance national economy, pattern settlement, social structure. The...