Electric machines are being deployed in industrial applications where previously only mechanical systems were considered, as environmental concerns from burning fossil fuels and energy costs are becoming a more dominant factor in system design considerations. Electric machines offer greater operational flexibility and typically higher efficiencies. There has therefore been a growing demand to develop electric machines to replace traditional mechanical systems in a number of industrial applications. One such suitable electric machine topology is the 'direct-drive' machine. These machines can be used where implementation does not require a high operating speed, therefore eliminating the necessity of a gearbox. Furthermore, direct-drive machines offer a number of advantages including reductions in through-life costs, noise and vibration, and overall system volume. This thesis explores the development of direct-drive rim-driven machines, constructed by integrating a propeller with the electric machine that is driving it, by mounting the machine directly around the outside of the propeller. A novel machine topology was developed by integrating a conducting-can onto the rotor structure capable of producing induction torque, to create a motor that can start directly from the main electric supply. This eliminated the need for a power electronic converter, gearbox and complicated drive shafts arrangement, for use in applications where only a low duty cycle of operation was required such as secondary propulsion systems for marine applications or where safety and reliability is of significant importance. A number of other industrial applications that may benefit from this canned rim-driven topology were also identified including seal-less pumps and 'run-of-the-river' generators. Permanent-magnet and induction motor topologies operating in fluid environments were investigated, using finite element analysis and thermal analysis techniques, to examine and optimise the design of the rim-driven topology for a specific operational requirement, in each industrial application area identified. A 30 kW canned line-start rim-drive induction motor was designed and developed for use as a bi-directional thruster on-board a tidal stream turbine. A novel induction motor topology was developed utilising only a conducting-can on the rotor, which eliminated the need for a traditional squirrel-cage, due to the ratio of the relatively large mean air-gap diameter to the small output power requirement; creating a simple yet reliable direct-drive canned induction motor. The design of this motor was manufactured and successfully tested to validate the design process.

How would an AV allow kids to commute to school and extra activties by themselves in 2040? Mate is a vision of an interior inviting kids to commute by themselves, questioning how an autonomous vehicle could be designed. It is inspired by interior designs for kids intended for creativity and fun. Mate is intended for future child friendly cities and how they could incorporate fully autonomous zones which would allow for less safety requirements and lead to more freedom in the design of the vehicle. Looking at how companies today have services for commuting kids and what is needed for parents and childs to feel safe using these was also a vital aspect. After understanding the future context of the vehicle, the design process started with exploring different concepts for the interior. This led to a chosen concept which then were checked in a package. A revision of this package led to new design restraints which enabled new ideas to spur. It became apparant childrens different heights were a major factor for the interior seats. A mock up was made both in real life and in 3D. Therefore the design was changed to accomodate different heights leading to the idea of the final idea which was visualised in vision renderings leading up to the final 3D development. The Mate is a small autonomous shared vehicle for 2040 which fits 4 kids in the age range of 8 to 13. It´s interior is in colors which reflect a younger audience. It´s shapes are soft and help reflect safety and fun. The seating is in the window areas which allows for new ways of enjoying the outside view but also talking with the other occupants. The seats are able to fit the kids different heights and allows for two different seating positions. Lights show the kids where to be seated while also having sound to accomodate the kids getting off and on at the right place. Mate also communicates with the parents and allows for the kids to be autonomous.

La clinique auprès d’adolescents amène le psychologue à s’interroger sur la place qu’occupent le regard et la voix au cours de cette traversée. Si ces deux objets sont au cœur de la naissance du sujet, leur nouage devient incertain au temps de l’adolescence. Les fugues ado- lescentes, que nous désignons par le terme « disparition » adviennent comme le témoignage d’un dénouage : celui du regard et de la voix. Ainsi, disparaître, c’est s’arracher au silence de l’Autre, un silence vociférant, structuré comme comme un mauvais œil. Il s’agit, alors, de créer un lieu, un espace — celui de la disparition — à partir duquel pourra se penser le retour. / The adolescent’s clinic brings the psychologist to question the place of the look and the voice during this passing through time. Even if these two items are central in the subject’s birth, their knotting becomes uncertain at the time of adolescence. Teenage runaways, in what we could refer as « disappearance » happens as the testimony the unknotting : that one of the look and the voice. Thus, to disappear, is to draw off the silence of Other one, a vociferous silence, structured like a jaundiced eye. It is a question, then, to create a place, a space — the one of disappearence — from where the return can be thought.

This project explores the rapidly expanding area of AC direct drive for LED lighting. AC LED driving does not use typical DC-DC converter-based driving but uses semiconductor switches and a linear regulator to activate a number of LEDs proportional to the input voltage at any given time. This allows bulky, expensive magnetics to be eliminated from the system. The goal of this project was to design a scaled-down physical AC LED direct drive system to validate the conclusions of methods for improving efficiency from a previous investigation that found minimizing voltage across the linear regulating MOSFET led to higher efficiency at the cost of increased input current THD. This project found that this conclusion is physically realizable, with a final efficiency of 94.46% and an input current THD of 58.9%. This result was achieved by taking the previous investigation’s final design as a starting point and replacing ideal switches and control signals with discrete components. The final version uses a set of comparators and sense resistors to determine when a given LED stack should be on for a simple, analog control solution. Once the system was simulated this way, the assembled version was used to measure efficiency, power factor, current THD, flicker index, and DC supply power. Additional plots of the stack voltages and control signals were collected to verify proper operation and compare to simulation. The final measurements aligned with trends from simulation and result in a simple AC direct drive solution that requires no specialty ICs.

The diploma thesis is focused on the design of a sport electric motorcycle, designed for road traffic for one-man crew. The aim of the concept is to distinguish it from the design of the current production, which is typically based on conventional motorcycles.

Einleitung: Die sog. Direct-Drive-Simulation (DDS) bietet Patienten präoperativ eine Klangsimulation des "Vibrant Soundbridge®-Hörens". Ein Floating-Mass-Transducer (FMT) wird auf das Trommelfell oder die rekonstruierte Paukenabdeckung aufgesetzt, worüber den Patienten Testsignale dargeboten werden. Ziel der Arbeit war die Evaluation einer Weiterentwicklung des Tests hin zur DDS-Tonaudiometrie und DDS-Sprachaudiometrie. Bei Bestätigung der ersten Hypothese, soll darüber hinaus geprüft werden, ob eine Hirnstammaudiometrie (BERA) über den DDS durchgeführt werden kann. Ziel der vorliegenden Arbeit ist es Referenzdaten an einer Population Normalhörender zu generieren. Zusammenfassung: Sowohl die DDS-Ton- und Sprachaudiometrie als auch die Ableitung einer BERA über den DDS-FMT sind möglich. Mit der DDS-BERA besteht nun erstmals die Möglichkeit eines objektiven DDS-Tests präoperativ. Die notwendige Einschätzung der Ankopplungsqualität zur korrekten Interpretation der DDS-BERA lässt sich elegant mit Hilfe der DDS-Tonaudiometrie ermitteln. / Background: The direct drive simulation (DDS) offers patients a preoperative sound simulation of the active middle ear implant "Vibrant Soundbridge®". The floating mass transducer (FMT) is placed on the eardrum or on the tympanic membrane graft, where the signals are applied. The aim of this study was first to evaluate and develop a specific Direct Drive-Pure-Tone-Audiometry (DD-PTA) as well as a Direct-Drive-Speech-Audiometry (DD-SA) and if feasible, expand the test to an objective audiometric test, the Direct-Drive-Auditory Brainstem Response (DD-ABR). 20 normal hearing subjects were tested. Summary: DD-PTA, DD-SA and DD-ABR are possible examinations that could be used in the daily hospital routine. The DD-ABR threshold correlates well with the DD-PTA. For the first time DD-ABR offers the possibility of an objective DDS-test. DD-PTA is the key tool to evaluate the coupling quality which is a precondition for correct interpretation of the DD-ABR.

This master thesis is deals with phenomenon of bifurcation in DC drive. It contains theoretical part, results of simulations and measurements of real DC drive in laboratory. The simulations was made in MATLAB, their results are bifurcation diagrams for different value of parameters. Target of measurement in laboratory was observed bifurcation on the real DC drive. Results of measurement are too transformed to bifurcation diagrams.

The master´s thesis discuss characteristics of hybrid electric vehicles and lead-acid accumulators applied in car industry. It compares classic and alternative drive in cars, descibes classification of hybrid drives and its characteristics. Further work disscus lead-acid accumulators which focuses on VRLA accumulators applied in hybrid electric cars. Practical part contains a construction description of negative electrode and experiment, which studied influence of various amount addition of carbon on attributes of these electrodes.

This Master’s thesis is focused on capatilibities of software SinuTrain. In the first part there is a summary of drive systems and a research of their share in the marketplace. In the next part debates abilities and some methods of programming. The last part devotes to practical demonstrations of production of some parts of mine draft and simulation of their production.

The object of this master’s thesis is design of a suitable hydrostatic travel drive for harvester. The first part dedicates of constructions of harvesters and actual different conceptions of travel drive. Next, there are design of hydrostatic circuit, calculation of general hydraulic parameters and design of hydraulic components in the second part. The last part deals with issue of combustion engine and cooler.