Search results for "Ampere"
showing 10 items of 34 documents
Maximum Torque Per Ampere control algorithm for low saliency ratio interior permanent magnet synchronous motors
2017
This paper presents an investigation on the comparison between the Maximum Torque Per Ampere (MTPA) and the Field Orientation Control (FOC) algorithms for interior permanent magnet synchronous machines (IPMSMs). In particular, this study was carried out on a small-power IPMSM with low salience ratio. Both control algorithms have been implemented in the Matlab/Simulink environment, obtaining promising results.
Experimental comparison of two control algorithms for low-saliency ratio interior permanent magnet synchronous motors
2018
In this paper, an experimental investigation on the comparison between the Maximum Torque Per Ampere (MTPA) and the Field Orientation Control (FOC) algorithms for interior permanent magnet synchronous machines (IPMSMs) is described, analyzed and discussed. This investigation was carried out on a small-power IPMSM with low saliency ratio. More in detail, after a previous simulation study, the control techniques have been experimentally implemented and validated through means of a dSPACE® rapid prototyping system. The performances of the two algorithms have been evaluated and compared, obtaining interesting results.
"Se mikä kelpaa porvarille, saa kelvata tämän maan työmiehellekin!"
2001
Innovations and ecosystems : a characterization of Smart Tampere innovation ecosystem
2019
Master's thesis Innovative governance and public management ME523 - University of Agder 2019 The following thesis focuses on innovation ecosystem. As described in thefirst section, innovations are of great importance for tackling global challenges such as climate change andthus,of relevancy for the regional economic development. The growing importance of innovationshas motivated numerous new approaches to innovation management, especiallyin the last years the approach ofinnovation ecosystem.In the secondsection, the concept of innovation ecosystem is introduced and the most relevantconcepts from the literature are discussed. It thereby compares innovation ecosystem to other concepts such as…
La enseñanza basada en preguntas : La ley de Ampère y el término de Maxwell
2020
Frecuentemente a los maestros de Física y de Matemáticas se les recomienda una enseñanza activa de estas áreas del conocimiento, que consiste en una interacción continua entre el maestro y el estudiante. Con una metáfora de un interrogatorio adecuado, se pretende mostrar al docente una manera de orientar al estudiante en su aprendizaje, motivándolo a recuperar conocimientos previos o causándole un conflicto cognitivo que lo lleve a reformular su aprendizaje. Esta manera de proceder didácticamente se ha llamado enseñanza basada en preguntas, cuya primera referencia histórica nos remite a la Grecia antigua. En este trabajo se presenta la enseñanza de la ley de Ampère con la generalización de …
Perimeter symmetrization of some dynamic and stationary equations involving the Monge-Ampère operator
2017
We apply the perimeter symmetrization to a two-dimensional pseudo-parabolic dynamic problem associated to the Monge-Ampere operator as well as to the second order elliptic problem which arises after an implicit time discretization of the dynamical equation. Curiously, the dynamical problem corresponds to a third order operator but becomes a singular second order parabolic equation (involving the 3-Laplacian operator) in the class of radially symmetric convex functions. Using symmetrization techniques some quantitative comparison estimates and several qualitative properties of solutions are given.
Power quality effects on the measurement of reactive power in three-phase power systems in the light of the IEEE Standard 1459–2000.
2007
Reactive power is a very important quantity in electric power systems since it affects the efficiency of these systems. Also, capacitive loads can produce over-voltages in electric transformers by Ferranti effect, which produces bad power quality, so it is necessary to measure the reactive power correctly. In this paper reactive phenomena in three-phase power systems with unbalanced voltages are expressed and measured in the light of the IEEE Std 1459-2000. For analyzing the reactive phenomena the positive-sequence fundamental frequency instantaneous reactive power is used. By comparing the expressions of this instantaneous power in three-phase systems with unbalanced voltages with those co…
Eino Heikkinen 1939-2022
2023
Gerontologian professori emeritus Eino Heikkinen kuoli kotonaan Helsingissä jouluaaton aattona 2022. Hän oli suomalaisen nykygerontologian tienraivaaja, jonka näkemyksellisyys ja rohkeat avaukset vaikuttivat suuresti ikääntymistutkimuksen kehitykseen ja instituutioihin. nonPeerReviewed