Temat: changing - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Induction machine with pole-changing winding for turbomechanisms
Autorzy:: Bobojanov, Makhsud
Powiązania:: https://bibliotekanauki.pl/articles/24202741.pdf
Data publikacji:: 2023
Wydawca:: Polska Akademia Nauk. Czasopisma i Monografie PAN
Tematy:: basic scheme of winding
differential leakage factor
Görges polygone
magnetizing forces
pole-changing winding
pole amplitude modulation
winding factor
Opis:: This paper investigates the possibilities for developing a pole-changing winding with a pole ratio of 3:4 with improved electromagnetic properties. Such a winding can be used in two-speed induction motors for turbo mechanisms. The scheme of the new winding was obtained by using a discretely-specified spatial function method developed at the Tashkent State Technical University. A comparison of the parameters obtained for a similar winding received by the pole amplitude modulation method has been presented. Design of a new motor with a new winding is developed based on the standard induction motor. The paper presents results of laboratory tests, too.
Źródło:: Archives of Electrical Engineering; 2023, 72, 2; 415--426
1427-4221
2300-2506
Pojawia się w:: Archives of Electrical Engineering
Dostawca treści:: Biblioteka Nauki

Artykuł

Zmień widok

na półce

Skocz do pozycji: 2.

Tytuł:: Impact of increased temperature of lower end-fitting of a composite long rod insulator on its mechanical strength under variable loads
Autorzy:: Bielecki, Jerzy
Kotowski, Piotr
Wańkowicz, Jacek
Powiązania:: https://bibliotekanauki.pl/articles/24202743.pdf
Data publikacji:: 2023
Wydawca:: Polska Akademia Nauk. Czasopisma i Monografie PAN
Tematy:: composite suspension line insulators
high temperature low sag
HTLS
conductor
mechanical insulator strength
material fatigue
insulator tests
cyclic load
changing load
Opis:: This paper describes results of tensile mechanical strength testing of two types of composite suspension line insulators from two manufacturers. In order to take into account the operation of composite insulators in overhead transmission lines with high-temperature low-sag (HTLS) conductors, the testing of their static and fatigue strength was performed at both ambient and elevated temperatures. The results showed that the static mechanical strength of composite insulators decreased with an increase in the temperature of the lower end fitting of the insulator, and proved that it followed a third-degree polynomial function. Calculations performed demonstrated that a significant cause of reduction in strength was the increase in the radial stress following the temperature increase in the crimped glassepoxy resin core of the insulator. The results of the fatigue strength testing demonstrated that the increase in the temperature of the lower end fitting of the insulator up to 85°C degree had a little effect on the fatigue strength of the tested composite insulators.
Źródło:: Archives of Electrical Engineering; 2023, 72, 2; 392--405
1427-4221
2300-2506
Pojawia się w:: Archives of Electrical Engineering
Dostawca treści:: Biblioteka Nauki

Artykuł

Zmień widok

na półce

Informacja

Wyszukujesz frazę "changing" wg kryterium: Temat

Źródło danych

Dostawca treści

Kolekcja

Rok wydania

Wydawca

Temat

Autor

Typ dokumentu

Język