Autor: Vasilyev, D. - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Soft starting and braking application for squirrel-cage induction motors operating in intermittent duty
Autorzy:: Firago, B.
Vasilyev, D.
Powiązania:: https://bibliotekanauki.pl/articles/1813599.pdf
Data publikacji:: 2012
Wydawca:: Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:: soft starting and braking
squirrel-cage induction motor
energy losses
stator winding temperature
frequency of starting
Opis:: This paper deals with energetic aspects of soft starting and braking application for the squirrelcage induction motors operating in intermittent duty with constant load. Energy losses in transients of an induction motor for different laws of voltage changing as well as induction motor stator winding temperature at the end of starting process are calculated and compared with the ones during fullvoltage starting and plug braking. Energy losses calculation during induction motor soft starting and braking has been performed analytically and via the Matlab simulation models of equivalent twophase induction motor in alfa to beta coordinates. The results of both calculation methods are compared and a divergence between them is determined. Also the effect of total energy losses on the induction motor stator winding temperature at the end of the motor starting process and its allowable frequency of starting is analyzed. Analytical calculation and simulation of soft starting and braking have been performed with allow for the linear and exponential laws of the first voltage harmonic magnitude changing. The results of simulation and analytical calculations are given in the tables.
Źródło:: Prace Naukowe Instytutu Maszyn, Napędów i Pomiarów Elektrycznych Politechniki Wrocławskiej. Studia i Materiały; 2012, 66, 32; 339-349
1733-0718
Pojawia się w:: Prace Naukowe Instytutu Maszyn, Napędów i Pomiarów Elektrycznych Politechniki Wrocławskiej. Studia i Materiały
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Concerning the vector control of a squirrel-cage induction motor
Autorzy:: Firago, B.
Vasilyev, D.
Powiązania:: https://bibliotekanauki.pl/articles/1814042.pdf
Data publikacji:: 2014
Wydawca:: Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:: induction motor
synchronous rotating frame
vector control
mathematical model
Opis:: A technique for investigation of electric drive dynamics when an induction motor operates at the direct vector control with alignment of the axis x of synchronous rotating frame x–y along the rotor flux linkage vector is presented here. Simulation results of the specific electric drive verify the faithfulness of recommended technique.
Źródło:: Prace Naukowe Instytutu Maszyn, Napędów i Pomiarów Elektrycznych Politechniki Wrocławskiej. Studia i Materiały; 2014, 70, 34; 271--285
1733-0718
Pojawia się w:: Prace Naukowe Instytutu Maszyn, Napędów i Pomiarów Elektrycznych Politechniki Wrocławskiej. Studia i Materiały
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Nanostructured Materials for Optoelectronic Applications
Autorzy:: Kamanina, N.
Vasilyev, P.
Serov, S.
Savinov, V.
Bogdanov, K.
Uskokovic, D.
Powiązania:: https://bibliotekanauki.pl/articles/1537908.pdf
Data publikacji:: 2010-05
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 42.70.-a
42.79.-e
78.20.-e
78.30.Na
Opis:: Study and optimization of new nanoscale materials useful for optoelectronic application have been considered. The search for the effective nanostructured materials has been revealed in two directions: to optimize the mechanical hardness of the inorganic systems and to increase the photorefractive parameters of the organics with nanoobjects. It has been testified that the surface mechanical properties of the inorganic materials via nanotubes treatment process can be drastically improved. For example, the surface mechanical hardness of the UV and IR range soft materials can be increased up to 3-10 times under the conditions of oriented nanotubes placement. It has been obtained that the nonlinear optical characteristics (nonlinear refraction $n_{2}$ and cubic nonlinearity $χ^{(3)}$) of the organics thin films sensitized with fullerenes or nanotubes can be increased up to 3-4 orders of magnitude in comparison with the same parameters for bulk materials traditionally used for nonlinear optics.
Źródło:: Acta Physica Polonica A; 2010, 117, 5; 786-790
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

Tytuł:: Influence of the Nanostructures on the Surface and Bulk Physical Properties of Materials
Autorzy:: Kamanina, N.
Shurpo, N.
Likhomanova, S.
Serov, S.
Vasilyev, P.
Pogareva, V.
Studenov, V.
Uskokovic, D.
Powiązania:: https://bibliotekanauki.pl/articles/1503338.pdf
Data publikacji:: 2011-08
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 42.70.-a
42.79.-e
78.20.-e
78.30.Na
Opis:: Fullerenes, nanotubes, quantum dots are considered as effective sensitizers to modify both the optical, nonlinear optical features, dynamic and polarization characteristics, as well as mechanical and spectral properties of the organic and inorganic materials. The correlation between photorefractivity and photoconductivity was supported and the relation between charge carrier mobility of pure conjugated structures and nanoobjects-doped ones has been revealed. An increase of transmission of nanostructured polarization films was observed. An extension of the nanocomposites applications area is considered.
Źródło:: Acta Physica Polonica A; 2011, 120, 2; 256-259
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

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