Temat: electrical efficiency - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Selected elements of a new method of induction motor efficiency determination
Autorzy:: Dabala, K.
Powiązania:: https://bibliotekanauki.pl/articles/199896.pdf
Data publikacji:: 2016
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: maszyny elektryczne
silniki indukcyjne
określanie efektywności
electrical machines
induction motors
efficiency under voltage distortions
intervals in efficiency determination methods
Opis:: This paper presents the results of estimating method of the energy consumed by induction motors and the legal situation concerning the efficiency of electrical motors in the European Union. Three elements of a new method of induction motor efficiency determination are described: methodology of taking into account the influence of non-sinusoidal voltage and the voltage unbalance on the motor efficiency and the application of the interval arithmetic in order to determine the border error of the induction motor efficiency. It is proved that the middle of efficiency interval for the direct method of efficiency determination is always equal to or higher than the measurement result and the radius of interval is longer than the border error.
Źródło:: Bulletin of the Polish Academy of Sciences. Technical Sciences; 2016, 64, 2; 307-313
0239-7528
Pojawia się w:: Bulletin of the Polish Academy of Sciences. Technical Sciences
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Operating point resolved loss computation in electrical machines
Autorzy:: von Pfingsten, G.
Ruf, A.
Steentjes, S.
Hombitzer, M.
Franck, D.
Hameyer, K.
Powiązania:: https://bibliotekanauki.pl/articles/141566.pdf
Data publikacji:: 2016
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: efficiency maps
material degradation
magnetic losses
magnetic material
behaviour
soft magnetic materials
electrical machines
Opis:: Magnetic circuits of electromagnetic energy converters, such as electrical machines, are nowadays highly utilized. This proposition is intrinsic for the magnetic as well as the electric circuit and depicts that significant enhancements of electrical machines are difficult to achieve in the absence of a detailed understanding of underlying effects. In order to improve the properties of electrical machines the accurate determination of the locally distributed iron losses based on idealized model assumptions solely is not sufficient. Other loss generating effects have to be considered and the possibility being able to distinguish between the causes of particular loss components is indispensable. Parasitic loss mechanisms additionally contributing to the total losses originating from field harmonics, non-linear material behaviour, rotational magnetizations, and detrimental effects caused by the manufacturing process or temperature, are not explicitly considered in the common iron-loss models, probably even not specifically contained in commonly used calibration factors. This paper presents a methodology being able to distinguish between different loss mechanisms and enables to individually consider particular loss mechanisms in the model of the electric machine. A sensitivity analysis of the model parameters can be performed to obtain information about which decisive loss origin for which working point has to be manipulated by the electromagnetic design or the control of the machine.
Źródło:: Archives of Electrical Engineering; 2016, 65, 1; 73-86
1427-4221
2300-2506
Pojawia się w:: Archives of Electrical Engineering
Dostawca treści:: Biblioteka Nauki

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