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2174 Uppsatser om Current conveyor - Sida 4 av 145
Värmestyrning I Handske
This rapport is result of a project. The purpose of which was to design a circuit that is used in a heat glove. The heat glove is the technical aid which provides heat inside a glove.It is specially suited for old people who have problems with cold hands because of decreased blood circulation.There already was an old circuit in the glove that gives a constant current which develops heat from battery to glove through a circuit. The temperature is between 32 and 34 degrees.The problem with the existing circuit was to regulate the temperature. There is only on/off switch and there is no way to adjust desirable value of the temperature.In order to solve the problem the old circuit was investigated.
Val av överlastskydd för elektriska ventilmanöverdon på kärnkraftverket i Forsmark
At nuclear power plants, electrical valve actuators are important for ensuring that the reactor core is water covered and the pressure in the reactor tank and containment is limited. The electrical actuators are provided with overload protection in case of drawing higher current then the motors are rated for. When safety manoeuvres are needed, the overload protection must not trig and cause the valve to stop before completing the manoeuvre. Analyses have showed that the current settings of the overload protection may cause an illegitimate trig at the worst theoretically possible accident. A new method has been developed with conservative assumptions and applies overload protections for all electrical valve actuators at the three reactors in Forsmark..
Sveriges bostadsmarknad - Befinner vi oss i en prisbubbla?
This bachelor thesis aims to analyse the Swedish mortgage market and investigate whether it is in a current price bubble or not. Comparisons have been made with Denmark, a country with a market similar to Sweden?s, and where the mortgage market faced a price bubble that crashed in 2008. The housing market in Stockholm has been analysed as a separate market, as it differs from Sweden as a whole in prices and underlying factors to increased prices. The conclusion of this thesis is that not Sweden, nor Stockholm, is currently in a price bubble at the mortgage market.
Beskattning av skalbolagstransaktioner : Analys av skalbolagsreglerna ur ett tillämpnings- och rättssäkerhetsperspektiv
Shell companies are characterized by containing liquid assets such as cash, securities or other similar assets. Transactions of shell companies constitutes a severe problem since the purchaser often has the aim of obtaining undue tax advantages by not paying the tax debt of the company.Historically it has been complicated for the legislator to stop the set-up in an efficient way since the transactions as such are not illegal, instead rather commonly used for example to restructure companies or for the transfer of companies to the younger generation. The purpose of the current legislation is to prevent individuals and corporations to involve in shell company trade. Aiming for an efficient legislation, the tax rate is at a very high level.The issue with the rules is that also honest buyers are at risk of being covered. This calls for high demands in complying with the principle of legal certainty and the possibility to forecast the tax consequences.The purpose of the thesis is to identify and analyze eventual problems when applying the legislation.
Strömkontroll till aktiva magnetlager med noggrann och störningsreducerad strömmätning
There is always a need for more effective ways to store energy in order to reduce the human impact on the environment. One step on the way can be the use of flywheels as kinetic energy storage devices. Low frictional losses are essential for a flywheel to be effective. To minimize these losses active magnetic bearings (AMB) can be used to keep the shaft centered instead of the more conventional ball-bearings. AMBs use actuators and a fast control system that needs correct and noise-free measurement data of the shaft position and the current in the actuators to work properly.This thesis explains the process of constructing power electronics and a current measurement system for active magnetic bearings (AMB).
Klassiska konflikter i en ny debatt - Analys av idéerna i debatten kring bildandet av ett feministiskt parti i form av Feministiskt initiativ
Every now and then new political ideas appear which creates debate. A current example of political debate is the one which concerns the creation of a feminist political party in Sweden -Feministiskt initiativ. Apparent in the current debate is that there are two existing conflicts of ideas present. The liberal thought of politics of ideas stands against feminism's demand for presence in the political life. And the other, the conflict which concerns the question of where a line between the public and the private spheres should be drawn.
Analytiker och riktkurser: - Varför bry sig?
The purpose of this master thesis is to evaluate how the current share price and market consensus affect security analysts target price and if an investor should pay any attention to it. Empirical data is primarily collected from qualitative interviews with ten security analysts but also from a quantitative e-mail survey. Our main finding is that security analysts are indeed affected by each others earnings forecasts as well as the current share price. This is not strange, it is in several aspects rational. Security analysts has often nothing to gain by standing out too much and not either by spending too much time trying to create their own opinions due to lack of time or the complexity of what is analyzed.
Dokumenthantering i företag och organisationer: En fallstudie på Volvo Cars i Uddevalla
The aim of this thesis is to map the current internal information flow at Volvo Uddevalla, to detect obstacles in the flow and to find out how these obstacles can be avoided. The aim is also to describe how a corporation, in this particular case Volvo Uddevalla, creates knowledge and use information. The study is performed in order to create a base for the coming implementation of a new information standard. The method used is conducting an information audit investigating the current management of documentation according to the changes that have to be made to carry out the claims from the standard. The investigation is made by way of interviews with 16 of the employees at Volvo Uddevalla.
Solenergisystem i Hammarby Sjöstad
Problems with the current energy system, which partially relies on non-renewable fuels, are increasingly recognized. Emissions of greenhouse gases from fossil fuels may speed up global warming, which in turn leads to a number of negative consequences. Nuclear energy is risky and relies on consumption of a scarce resource. This leads to a demand of renewable energy that is also economically feasible. One possible renewable source of energy is solar energy.
Modellering och simulering av det evaporativa bränslesystemet i en personbil
This thesis work has been performed at the department of diagnosis and dependability at Volvo Car Company, Torslanda. The background of this project is based on interest in ascertaining how different factors possibly can affect a diagnosis method, which has been developed to find leaks in the fuel tank and evaporation system. According to the OBD II requirements leaks with an orifice diameter larger or equal to 0,5 mm, must be detected. The idea of the diagnosis method is to create an over pressure in the system with an air-pump. The current through the pump is measured and correlates to the power consumed by the pump.
Konstruktion av conveyorbana till fönstermåleri
Detta examensarbete utfördes våren 2006 på teknikkonsultföretaget Cidema Skellefteå AB. Målet med examensarbetet är att skapa ett offertunderlag i form av en konstruktion av en transportbana till måleriet på ett snickeri. Banans huvudsakliga uppgift är förvaring av nymålade fönsterbågar under torkningen av färgen. Banan ska vara placerad högt under taket för att inte påverka övrigt arbete i lokalen Längs banan ska det finnas två stationer, en för spackling och en för målning. Mellan stationerna ska det finnas buffertar för att fönsterbågarna ska lagras mellan de olika momenten i ytbehandlingen.
Vägledningsmetoder? Ja, tack! Nej, tack! : Om användninga av vägledningsmetoder av yrkesverksamma studie- och yrkesvägledare
The overall aim of this study is to achieve the increased knowledge of the use of the counselling methods in the student counsellors' work and to find the possibilities for development. Two questions are used as guidelines:Which counselling methods do student counsellors use in their work in schools?How can the current education for the student counsellors be supplemented?The analysis of the interviews with six counsellors in Stockholm's administrative province showed that even uneducated counsellors use the same counselling methods as the educated ones. All these methods which are used remind of the known counselling methods that are the part of the current education for the student counsellors.In general counsellors experienced that the education for the counsellors should be supplemented within the field children with special needs and that conversation's methodology is the essence of the counselling work..
Utveckling av högspänningskontakt
This report describes the development of a high-voltage connector at the request of Scandinova Systems AB in Uppsala. The development process is described from the making of a customer demand specification, to the making of drawings for the manufacturing of prototypes. Scandinova develops high-voltage modulators, hence the need for connectors that can handle very large power pulses. Their current connector has several weaknesses that may cause the connector to melt or catch fire. The development began with a number of studies that included the modulator structure and the current connector structure and functions.
Återkallning av Meningsbärande Enheter med Hjälp av Stödord och Internet : Ett kvasiexperiment för att undersöka återkallning av semantiskt meningsbärande enheter med externa hjälpmedel
The current study sought to examine if post-produced semantic memory cues are a good aid for memory recall. It also focused on remembering units with a meaning, instead of just remembering lists of words. In the current study a factual text was used where the participants were tasked with recalling as much information as possible either with the aid of cues (keywords written by the participants themselfs), computer with Internet or no aids at all. The results showed that keywords are significantly better for memory recall. The results were discussed in regards to modern models describing semantic memory.
Conqueror för Indigo
Conqueror for Indigo is production treated with an active chemical to maximize the ink adhesion.ArjoWiggins has found that another chemical, the candidate compound, would improve the propertiesof the paper. ArjoWiggins therefore wish to replace the current compound. To strengthenthe patent requirements for ink adhesion needs to be determined. A theory is developed to whychemicals with certain properties maximize the ink adhesion. Experiments are performed but theresults are inaccurate.