FRINK Linked Data Fragments server

Matches in SemOpenAlex for { <https://semopenalex.org/work/W2243992016> ?p ?o ?g. }

• W2243992016 abstract "Pulse width modulation (PWM) voltage source converters (VSC) are one type of motor drives that have become popular because they enable precise control of speed and torque in medium voltage motors. However, these drives are known to have adverse effects on the insulation system particularly on conductive armour tape (CAT) and semi-conductive stress grading tape (SGT). These tapes, which are crucial components of the insulation system, control the surface electrical stresses in the stator slot and in the end portion of the form-wound coils outside the grounded stator. The material properties of CAT and SGT and the methods by which they are applied on form-wound motor coils are traditionally designed for power frequency, or a 60 Hz sinusoidal voltage. However, because of the high frequencies associated with the repetition rate and the fast rise time of the PWM pulses, elevated electrical and thermal stresses develop in these tapes, which can lead to premature insulation failure. Little research has been conducted with respect to understanding the mechanism of dielectric heating as a function of frequency and repetitive pulse characteristics. The material characterization of CAT and SGT is a vital part of an investigation of the performance of the stress relief system at high frequencies. In this study, the anisotropic dielectric properties of CAT and SGT have been measured in dc and ac and in low and high electric fields. The laboratory experiments for determining the material characteristics are discussed and the results analyzed. According to the ac space charge limited field (SCLF) theory, the maximum ac tangential component of the electric field in a nonlinear resistive SGT on medium voltage form-wound motor coils can be predicted from the field dependent electrical conductivity and the frequency. However, the SCLF theory cannot predict the total electric field (vector sum of the tangential and normal components) in the air adjacent to the surface of the tapes. Simulations of the electric field using a finite element method (FEM), is one of the best ways of finding the resultant electric field distribution in the air space adjacent to the SGT. However, prior to this study, researchers simplified the modelling of the stress relief system to avoid the convergence problems that develop due to the nonlinearity of the SGT conductivity as a function of the electric field, and also because of the geometry and dimensions of the tapes when their depths are orders of magnitude smaller than the other dimensions associated with form-wound coils. For modelling the stress grading (SG) system at power frequency and at the rated voltage, the dc isotropic conductivity of the SGT and CAT has also been extensively investigated. However, relatively little work has been done with respect to the ac electrical behaviour of these materials and dc modelling cannot reflect the effects of high-frequency stresses on the machine insulation. In this study, comprehensive transient FEM modelling has been developed in order to simulate the…" @default.
• W2243992016 created "2016-06-24" @default.
• W2243992016 creator A5073926289 @default.
• W2243992016 date "2011-01-24" @default.
• W2243992016 modified "2023-09-24" @default.
• W2243992016 title "Analysis of Electrical and Thermal Stresses in the Stress Relief System of Inverter Fed Medium Voltage Induction Motors" @default.
• W2243992016 cites W1482732863 @default.
• W2243992016 cites W1501164274 @default.
• W2243992016 cites W1511950867 @default.
• W2243992016 cites W1521549962 @default.
• W2243992016 cites W1524808778 @default.
• W2243992016 cites W1543488310 @default.
• W2243992016 cites W1573847156 @default.
• W2243992016 cites W1574513653 @default.
• W2243992016 cites W1574567355 @default.
• W2243992016 cites W1864734188 @default.
• W2243992016 cites W1903844995 @default.
• W2243992016 cites W1918331091 @default.
• W2243992016 cites W1963681959 @default.
• W2243992016 cites W1974139420 @default.
• W2243992016 cites W1983779395 @default.
• W2243992016 cites W2007301380 @default.
• W2243992016 cites W2009198213 @default.
• W2243992016 cites W2009682845 @default.
• W2243992016 cites W2010798029 @default.
• W2243992016 cites W2016538457 @default.
• W2243992016 cites W2020098601 @default.
• W2243992016 cites W2020109296 @default.
• W2243992016 cites W2032127101 @default.
• W2243992016 cites W2056957944 @default.
• W2243992016 cites W2062582870 @default.
• W2243992016 cites W2074427573 @default.
• W2243992016 cites W2078682533 @default.
• W2243992016 cites W2079505289 @default.
• W2243992016 cites W2080986744 @default.
• W2243992016 cites W2096185397 @default.
• W2243992016 cites W2098648314 @default.
• W2243992016 cites W2100537475 @default.
• W2243992016 cites W2104958711 @default.
• W2243992016 cites W2105076764 @default.
• W2243992016 cites W2105946606 @default.
• W2243992016 cites W2108055963 @default.
• W2243992016 cites W2108078782 @default.
• W2243992016 cites W2110113823 @default.
• W2243992016 cites W2110190151 @default.
• W2243992016 cites W2112960005 @default.
• W2243992016 cites W2113034752 @default.
• W2243992016 cites W2115112346 @default.
• W2243992016 cites W2115669920 @default.
• W2243992016 cites W2117455475 @default.
• W2243992016 cites W2117878267 @default.
• W2243992016 cites W2119947234 @default.
• W2243992016 cites W2120134628 @default.
• W2243992016 cites W2124602583 @default.
• W2243992016 cites W2124981727 @default.
• W2243992016 cites W2126485067 @default.
• W2243992016 cites W2126940918 @default.
• W2243992016 cites W2128371092 @default.
• W2243992016 cites W2129655275 @default.
• W2243992016 cites W2129839122 @default.
• W2243992016 cites W2133809068 @default.
• W2243992016 cites W2133949823 @default.
• W2243992016 cites W2134597531 @default.
• W2243992016 cites W2135414714 @default.
• W2243992016 cites W2136303516 @default.
• W2243992016 cites W2137677827 @default.
• W2243992016 cites W2137699135 @default.
• W2243992016 cites W2137986920 @default.
• W2243992016 cites W2138874524 @default.
• W2243992016 cites W2139352833 @default.
• W2243992016 cites W2142066382 @default.
• W2243992016 cites W2143104918 @default.
• W2243992016 cites W2143303553 @default.
• W2243992016 cites W2145049752 @default.
• W2243992016 cites W2145887127 @default.
• W2243992016 cites W2146191896 @default.
• W2243992016 cites W2148520612 @default.
• W2243992016 cites W2148939098 @default.
• W2243992016 cites W2149046807 @default.
• W2243992016 cites W2152156267 @default.
• W2243992016 cites W2153541798 @default.
• W2243992016 cites W2156593311 @default.
• W2243992016 cites W2157409309 @default.
• W2243992016 cites W2164016436 @default.
• W2243992016 cites W2165119660 @default.
• W2243992016 cites W2166073185 @default.
• W2243992016 cites W2166850301 @default.
• W2243992016 cites W2167823580 @default.
• W2243992016 cites W2168646325 @default.
• W2243992016 cites W2169876656 @default.
• W2243992016 cites W2171244583 @default.
• W2243992016 cites W2172196458 @default.
• W2243992016 cites W2189570860 @default.
• W2243992016 cites W225505944 @default.
• W2243992016 cites W2506580684 @default.
• W2243992016 cites W2528783690 @default.
• W2243992016 cites W2540463917 @default.
• W2243992016 cites W2545497130 @default.
• W2243992016 cites W3149754046 @default.
• W2243992016 cites W598313993 @default.

• next