Search results for " roller"
showing 7 items of 7 documents
Simple Lossless Inductive Snubbers-Assisted Series Load Resonant Inverter Operating under ZCS-PDM Scheme for High-Frequency Induction Heating Fixed R…
2022
This paper presents a high-frequency pulse-density-modulated (PDM) soft-switching series load resonant inverter for use in induction heating (IH) fixed roller applications, which is used in copy and printing machines. The proposed simple high-frequency resonant inverter uses an asymmetrical pulse pattern PDM control scheme to achieve complete zero-current soft-switching commutations over a wide output range of input power regulation. Additionally, when the printer toner requires operation in very light load conditions, this causes difficulty in achieving zero-voltage or zero-current soft-switching operations in the IH high-frequency resonant inverters with pulse frequency modulation or puls…
Improving surface integrity of additively manufactured GP1 stainless steel by roller burnishing
2020
Abstract Additive manufacturing can rapidly fabricate the desired components by selectively melting and solidifying feedstock, rather than conventional subtractive machining. However, the difference between the two routes in terms of surface integrity of the final component is relevant. This paper presents a strategy to control the surface characteristics of additively manufactured stainless steel by roller burnishing. In particular, process parameters have been carefully selected to improve the surface integrity of the worked material. The quality of the surface has been analyzed in terms of roughness, hardness, microstructure and residual stresses. The overall product endurance under high…
A new quasi-static multi-degree of freedom tapered roller bearing model to accurately consider non-Hertzian contact pressures in time-domain simulati…
2014
The accuracy of the fatigue life calculations in rolling bearing simulations is highly dependent on the precision of the roller-raceway contact simulations and the ability to accurately include structural deflections of the supporting structure. Several different methods exist to simulate the pressure distributions, and in time-domain bearing simulations, where many contacts need evaluation, the simple and time efficient methods are more popular. These methods underestimate the fatigue life reduction due to roller end effects, overload and misalignments. Furthermore, existing time-domain rolling bearing models assume that the bearing rings remain circular, which can be a poor approximation…
Vienridu skrituļslidošanas apguves iespējas vispārizglītojošo skolu 6.klasēs
2021
Diplomdarbs “Vienrindu skrituļslidošanas apguves iespējas vispārizglītojošo skolu 6. klasēs”. Darba autore Sandra Jureviča, darba vadītājs lektore, Mg. sc. edu. Agita Klempere – Sipjagina. Darbs sastāv no ievada, teorētiskās daļas un empīriskā pētījuma, secinājumiem, literatūras saraksta un pielikumiem. Darba teorētiskajā daļā analizēta literatūra par vienrindu skrituļsldiošanas, kā pārvietošanās ar braucamlīdzekļiem, sporta veidu. Tā daudzveidību, pamattehnikas, pozitīvo ietekmi uz cilvēka ķermeni un mentālo veselību. Empīriskajā pētījumā, izmantojot kvantitatīvās un kvalitatīvās pētīšanas metodes, intervēti 6.klašu skolēni, izstrādāts 6 mācību stundu tematiskais plāns vienrindu skrituļsli…
Repertoar på tvers av naturlig stemmetype
2006
Masteroppgave i utøvende musikk 2006 - Høgskolen i Agder, Kristiansand Repertoar på tvers av stemmetype, er en undersøkelse om hvordan man kan gjøre repertoar på tvers av stemmetype av lyrisk og dramatisk karakter, og hva slags ødeleggelser som kan ramme stemmeinstrumentet hvis sangeren ikke er teknisk klar. Dette er en masteroppgave i mastergradsstudiet i utøvende musikk ved høgskolen i Agder. Oppgavens omfang er på 55 sider, samt abstract/utdrag, forord, innholdsfortegnelse og litteraturliste. Med oppgaven følger en cd med innspilt musikk der jeg synger tre arier av Guiseppe Verdi. Repertoar på tvers av stemmetype er delt inn i åtte kapitler. (1) Første kapittel handler om klassifisering …
Modeling and simulation of a High Pressure Roller Crusher for silicon carbide production
2011
Author's version of a chapter published in the book: 11th International Conference on Electrical Power Quality and Utilisation. Also available from the publisher at: http://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=6128963&tag=1 This paper describes the modeling and simulation of High Pressure Roller Crusher (HPRC) for the production of silicon cabide grains. The study is to make a model for simulation of a High Pressure Roller Crusher. A High Pressure Roller Crusher (HPRC) is an important part in the production of silicon carbide, where the grains are crushed into powder form and then sieved into specified sizes based on its usage. This paper will present a model based on Johanson's…