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Modelowanie i badanie erozji styków

Autorzy
Borkowski P.
Identyfikatory
Warianty tytułu
Języki publikacji
PL
Abstrakty
PL
W pracy przedstawiono analizę i syntezę dotychczasowej wiedzy dotyczącej erozji styków współczesnych łączników energoelektrycznych niskiego napięcia w szerokim zakresie prądów, szczególnie silnoprądowym od l do 10 kA. Zostały opisane zjawiska determinujące erozję styków, opracowane na podstawie literatury światowej i krajowej, jak i własnych rozważań teoretycznych oraz licznych badań w zakresie prądów: małych do 100 A, średnich do l kA i dużych do 10 kA. Przedstawione zostały własne analizy struktury powierzchnii degradacji warstwy wierzchniej styków wskutek działania łuku elektrycznego oraz oryginalne badania migracji materiału styków. Autor monografii przedstawił modelowe ujęcie erozji styków za pomocą komputerowej symulacji i analizy procesu nagrzewania, topienia i parowania materiału styków pod działaniem łuku elektrycznego, przy czym główny nacisk położył na zagadnienia istotne w praktyce, mianowicie: określił minimalną i maksymalną erozyjność styku dla pojedynczego wyłączenia prądu, dla różnych materiałów, przy różnych rozkładach gęstości mocy łuku na powierzchni. Przeprowadził także analizę wpływu zależności temperaturowej współczynników fizycznych metalu na proces nagrzewania styku. Autor opracował także program do obliczania erozji elektrod UMS oraz zaproponował nową metodę wyznaczania dyfuzyjności cieplnej materiałów stykowych, potrzebnej do modelowania procesów cieplnych w stykach Uzyskane wyniki badań i obliczeń mają duże znaczenie praktyczne zarówno dla konstruktorów łączników elektrycznych, jak i specjalistów z inżynierii materiałowej w zakresie kompozytowych materiałów stykowych. Pozwolą one na udoskonalenie technologii wykonania kompozytowych materiałów stykowych, poprawę ich właściwości użytkowych i zwiększenie niezawodności eksploatacyjnej łączników elektroenergetycznych.
EN
The thesis contains the analysis and synthesis of existing knowledge about the erosion of contact materials, in the low voltage contemporary switchgears for wide range of currents especially from 1 kA to 10 kA. Basing on the, worldwide literature as well as on the author's theoretical and laboratory research and numerous results for low (up to 100 A), medium (up to 1 kA) and high current (to 10 kA) the effects determining contact erosion has been described. The work presents an analysis of the surface structure and degradation of the surface layer of contacts due to electric arc. The original tests of contact material migration is here presented. The author of the monography showed the model concept of erosion with the use of computer simulation and analysis of the process of heating, melting and vaporizing of contact materials which cause contact erosion influenced by electric arc. The main stress was laid on fundamental practical issues eg. determination of minimal and maximal contact erosion for a one cycle electric disconnection for various materials and different distribution of power arc density on the surface. The researcher studied the dependence of thermal properties of metal upon the process of contact heating. The author also worked out his own program for calculating UMS electrode erosion and offered a new method of marking contact thermal diffusion, essential to the modeling of thermal processes in contacts. The research results have a vital practical meaning both for switchgear constructors and for scientists specializing in material engineering for composite contact materials. The results should improve the technology of composite contact materials productions. It will help to improve their practical properties and increase the exploitation reliability of switchgear that is so important for the economy.
Słowa kluczowe
PL
EN
Wydawca
Wydawnictwo Politechniki Łódzkiej
Czasopismo
Zeszyty Naukowe. Rozprawy Naukowe / Politechnika Łódzka
Rocznik
2008
Tom
Z. 365
Strony
3--210
Opis fizyczny
Bibliogr. 184 poz., tab., wykr.
Twórcy
autor
Borkowski P.
  • Politechnika Łódzka
Bibliografia
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