This thesis work contains a litterature study about electrical motors in general and how PWM-patterns for brushless DC-motors can be made. A suitable method has been implemented as a simulation model in VHDL. A simulation model of a brushless DC-motor which describes the phasecurrents, torque and angular velocity has also been made. The motor model made simulations easier for the complete PWM-system. The design was synthesised and tested with a prototypeboard including a SPARTAN II FPGA.

AbstractMy purpose with this study is to find out if it helps children who have diffuculties with their concentration if they get to practise their motor behaviour knowledge during their day at the school to promote their learning capacity. My purpose is also to find out how schools works with motor behaviour training. To get answers to my questions have I done interviews with four educationalists and I have also used books and internet sites. Motor behaviour is of importance to how children learn things in the school, without a well working motor children gets difficulties to sit still and to concentrate. The children may put their energy at the wrong things in the classroom, when the energy instead should be need to learning things.

Gtherm is an innovation company who has an unique air heat exchanger underdevelopment. The purpose of this thesis is to provide data of suitable motors for theheat exchanger and to find suitable motor suppliers.A motor specification was designed. It is an important basis for the search of suitablemotors. A compilation was made of nine motor suppliers and the suitable motorsfrom those. The compilation can be used by GTherm in their choice of suppliers andmotors.The compilation of the demands on the motor and analysis of suppliers indicated thatthere were no standard motors available to GTherms air heat exchanger.

AimThe aim with this essay has been to investigate how preschools profiling in motor activity training, work to stimulate motor development of children. In order to study this, the main focus for the research has been on the following queries:What characterize motor activity training at the preschools studied?What is the purpose with the motor activity training of preschools which were studied?How do the preschools describe the affect that motor activity training has on children?How do the preschools look at the need for motor activity training?MethodFour in-depth interviews were conducted with representatives of the chosen preschools profiling in motor activity. My selection was based on a strategic sample and this was made by an internet mapping of preschool activities in the districts of Stockholm, and information from the service guide of the town of Stockholm. Then e-mail was sent to ten contact persons at preschool units, and ten preschools were contacted directly by phone.

AbstractThis work is about children?s motor activity. You can often hear in media about sedentary children, and that one of the factors which contributed to this is computers and things like that. The main goal with this work is to find out how preschool teachers take care of children?s joy of movement and how they work to promote children?s progress of motor activity.

This report is the result of a diploma work made at IMT at US in Linköping. The purpose of this piece of work is to investigate the possibility to design a general program for data-acquisition using LabVIEW, suiting different hardwares and connections. Great importance has been attached to communication with serialport, using bluetooth, because different wireless PPG-instruments has been developed parallel to this project. These PPG-circuits uses this type of serialcommunication. Communication with USB, GPIB and analog connection has also been examined and analog communication has been tested practically.

In everyday life we perform motor behaviours that have no apparent instrumental function. Are these correlated to sensation seeking and do they differ depending on what situations we are in? University students in Örebro (N=108), participated in the study. The participants were asked to fill out a double questionnaire containing the sensation seeking scale and another one for measuring non-productive motor behaviours. The non-productive motor behaviours were not correlated to the sensation seeking scale.

The intention of the study is to investigate pedagogues understanding of physical activities in preschool. Should special activities be planned in order to stimulate children´s progress in motor skills? I also want to find out if pedagogues found the acitivities in preschool curriculum which says that the aim is to develop children´s body perception and teaching children how to care for their own health. I have interviewed seven pedagogues and focus of the question lied within motor skills and the joy of movement among preschool children. The result shows that pedagogues regard it to be important to stimulate motor activities and to encourage joy of movement in preschool.

In the electronic industrials, power control of AC motors is commonly used. For example power control of a washing machine motor, a vacuum cleaner motor or a coffee machine motor. The company Rejlers Ingenjörer AB has many projects where power control of AC motors is included. A prototype card for this task can save time and money for the company in the future and this is the reason for this thesis.The motors are power controlled by a TRIAC and control of the trigging pulses to the TRIAC. This card is modularly built and can easily be adapted for future projects where the power control of AC motors are included.The prototype card can be used as a subsystem in a larger electronics projects or as it is in lab environment for testing and evaluating new motors..

Humans and dogs are both mammals. One of the differences between the two species is that man walk on two legs and dogs on four legs. There are also differences in the nerve system between the two species. The human nerve system is supposed to provide opportunity for fine motor tasks- while the nerve system of the dog is more focused on the ability to perform locomotor tasks. Humans need to increase their motor control and postural control when affected by various conditions and diseases.

This case study examines how a group of upper secondary school students in a multiethnical suburb of Stockholm reason about the theory of evolution. The theoretical background of the thesis is postcolonial and the questions raised were how spread the creationist thoughts are in the group; in what way the backgrounds of the students are relevant to their thoughts; how the students construct the notion of the theory of evolution; how they position themselves and others in relation to the discourse of the theory of evolution; if there are any differences between students at the collage program of natural science and the collage program of social science, and in that case, what differences; and who or what inspires the young in their thoughts about the theory of evolution. To answer these questions both a survey poll and interviews were used. The result of the case study showed that a majority of the students at the investigated school has creationist ideas and that the students profiled on social science have creationist ideas in a wider extent. Another result is that the religious background seems to be relevant to develop creationist thoughts, while the variables gender, home district and educational level did not differ the creationist group from the whole group.

It has been shown in various research contexts that action programs do not always work as they should, even though there are clear guidelines on how the action programs should be designed and used. The aim of this study is to illustrate which processes that occur before an action program as well as how these processes lead to action that will give the student the support he or she needs. Through qualitative interviews with eight teachers, I have tried to answer the questions that I created. I have tried to answer my research questions that I have made based on the purpose. The questions are; What type of inquiry will be done if a student risk to not reach the knowledge goals? How will the inquiry support the action program? In what way does the action program support pupils in special needs? The result of my survey show that the survey being done for an action program is very individual-focused and that the mapping rarely shows on the teachers role or school environment to students who fall into special needs.

This master thesis covers the development of an automatic tuning process for the existing speed controller for drive systems. The drive systems are resonant two-mass systems where a motor is used to drive a load connected by a shaft. The developed method relies heavily on system identification and the construction of a complete mechanical model of the process. With this approach, the common problem with poor load speed control that derives from measuring only the motor speed can be addressed and solved for a majority of such processes.The automatic tuning method has along with general test functions been implemented in a complete tool for automatic tuning, testing and performance evaluation and reporting for drive systems..

The study aims to demonstrate the significance of educators lived experiences of stimulating children's physical development. It has been noted that children are occupying themselves with more and more sedentary activities, which may lead to that they do not develop motor skills at the pace expected. To understand educators lived experiences from a phenomenological hermeneutic perspective empirical relevance has been collected through narrative interviews. The results shows that educators find it difficult to understand the Curriculum goals for motor activity and that the desire to stimulate motor development is great, but the realization is conspicuous by its absence. The discussion highlights educator?s commitment and motivation and the importance of being a reflecting practitioner..

AimThe aim of this essay is by using a motor skill track to see if there exists any remarkable difference in the motor skill profiles between pupils from our montessori school and the mean score in the "Nytidstest". The questions at issue we had were: How is the motor skill profile on pupils in year 2 and 3 practicing montessori pedagogy? Is the motor skill profile superior or inferior to the mean score in the "Nytidstest"? What factors, if any, concerning the montessori pedagogy affects the results of the test?MethodWe used a motor skill track consisting of 8 stations sellected from the "Nytidstest" adapted for year 3 (the original test consists of 16 stations). Pupils from year 2 and 3 in our chosen montessori school were tested in groups of 4-5 persons each. We made the tests on two occasions each lasting for 100 minutes at the time.