Over eight decades of research into total artificial hearts (TAHs) has significantly contributed  to saving end-stage heart failure patients. However, at the current stage of development TAHs have several limitations, one of them being their bulkiness. Hence this thesis, with the goal to evaluate the right pump of the TAH developed by Scandinavian Real Heart and propose a compact right drive system without consuming significantly more power than the initial system. In order to do this, the requirements for the right drive systems are evaluated and defined. These requirements are then used to develop a methodology, including a MatLab simulation, for examining and selecting motors for the drive unit of the TAH. Subsequently, the methodology and the simulation are used to identify and assess over 200 motors, as well as select 3 motors for real-world experimental analysis. The suggested motors and the initial motor are then tested in a mock circulatory loop to investigate the performance characteristics and power consumption of the motors. This is done to select the final motor for the right drive unit, as well as verify and validate the created simulation. Based on careful analysis of the mathematical models used in the simulation and presented experimental data, the simulation was accepted to be verified. However, the support for validation of the simulation was lacking, as conflicting outcome for some cases were observed between the simulation and experimental data. Furthermore, given the empirical evidence, a brushless dc motor for the right drive unit and its implementation was proposed. The proposed motor has 11% reduction in size, 20% reduction in power consumption and 34% reduction in weight compared to the initial motor. Therefore, a drive unit with the suggested motor can have a significant impact on the right pump, and potentially even the left pump. Furthermore, the utilisation of the developed simulation can ultimately result in efficient and cost-effective motor selection and provide valuable contribution to the field of drive system development for TAHs. / Över åtta decennier av forskning om totala artificiella hjärtan (TAH) har omfattande bidragit till att rädda patienters liv med kronisk hjärtsvikt. Dessvärre har TAH flera begränsningar i det nuvarande stadiet i utveckling där storleken är ett problem. Därav denna avhandling, med målet att utvärdera den högra pumpen av en TAH utvecklad av Scandinavian Real Heart, för att föreslå ett mer kompakt höger drivsystem utan att det ska förbruka väsentlig mängd mer energi än det ursprungliga systemet. För att åstadkomma detta, har de fysiologiska krav för den högra pumpen analyserats och utifrån den utförda analysen nya krav för drivsystemet har formulerats. Dessa krav har sedan lagt grunden till utveckling av en metodik, inklusive en MatLab-simulering, för att undersöka och välja motorer för drivsystemet av en TAH. Metodiken i samband med simuleringen har använts för att identifiera och bedöma över 200 motorer. Av dessa motorer har tre motorer valts för experimentell utvärdering. I den experimentella utvärderingen, prestandaegenskaper och effektförbrukning av samtliga valda motorer och den ursprungliga motorn har utvärderats i ett konstgjort cirkulationssystem. Syftet med den experimentella utvärderingen är att komma fram till en slutmotor, samt verifiera och validera den utvecklade simuleringen. Baserad på noggrann analys av de använda matematiska modeller i simuleringen och det presenterade experimentella data, ansågs simuleringen vara verifierad. Däremot saknades stöd för validering av simuleringen, på grund av en del motsägande utfall mellan simulering och experimentell data. Därutöver, utifrån den empiriska evidensen föreslogs en borstlös likströmsmotor och dess implementering för det högra drivsystemet. Den föreslagna motorn är 11% mindre i storlek, har 20% lägre effektförbrukning och väger 34% mindre än den ursprungliga motorn. Därför kan en drivenhet med den föreslagna motorn ha en betydande inverkan på den högra pumpen, och potentiellt även den vänstra. Dessutom kan den utvecklade simuleringen användas för att göra urval av motorer för TAH på ett produktivt samt kostnadseffektivt sätt och därmed bidra till framtida utvecklingar av drivenheter för TAH.

This master´s thesis deals with synchronous motor model creation in MATLAB – Simulink program, with purpose of usage in AC Drives class. Models are created for motor with permanent magnets and for motor with wound rotor. The models are designed to enable simulation with both different longitudinal and transverse inductance, thus with salient rotor and non-salient rotor. The models can also be powered directly from three-phase sinusoidal source or a simple vector control can be used for their acceleration. All models are aligned so that their parameters can be set in only one m-file. Furthermore, automatic generation of phasor diagrams for steady-state motor, which serves as an interactive tool in class, is also created.

Este trabalho trata de um estudo teórico sobre o MMPI. Inicialmente, apre-sentamos um levantamento bibliográfico sobre o MMPI evidenciando os seus aspectos construtivos, seu funcionamento, suas características operacionais e suas possíveis aplicações. Em seguida, elaboramos um modelo físico fundamentado nas teorias do Motor de Indução Duplamente Alimentado (MIDA) e do Motor de Histerese (MH), o qual agrega as principais características operacionais do MMPI e reproduz o processo dinâmico de inscrição de pólos na periferia do rotor. A partir deste modelo físico propomos um modelo matemático, baseado na teoria dos circuitos magneticamente acoplados, constituído pelo equacionamento do MIDA, do MH e das fontes de alimentação do estator e do rotor. Deduzimos teoricamente todos os parâmetros necessários para a simulação computacional. Executamos a sua simulação computacional no software Matlab/SimulinkTM, cujos resultados ilustram o comportamento dinâmico das suas tensões, correntes, fluxos e mecânica. Comparando-se os resultados obtidos na simulação computacional com testes laboratoriais executados pelo CE-PEL, concluímos que o modelo matemático proposto e os parâmetros deduzidos podem ser considerados validados. Finalizando, sugerimos um motor monofásico de pólos lisos a imãs permanentes como uma alternativa mais simples do ponto de vista construtivo, porém com características operacionais semelhantes às do MMPI. / This work deals with a theoretical study on Written-PoleTM single-phase motor. Initially, we present the results from the bibliographical research on the Written-PoleTM motor, evidencing its constructional features, operation process, operational characteristics and some possible applications. Afterwards, we elaborate a physical model based in the theories of the doubly fed induction motor and the hysteresis motor, which incorporates the operational characteristic of Written-PoleTM motor and reproduces the written-pole dynamic process. Starting from this physical model we propose a mathematical model, based on the theory of the magnetically coupled circuits, constituted by the set of differential equations deduced from the doubly fed induction motor, the hysteresis motor and the stator and rotor voltage sources. We deduced theoretically all the computational simulation necessary parameters. We perform its computational simulation in the software Matlab/SimulinkTM, whose results illustrate the dynamic behavior of its voltages, currents, fluxes, torques and speed. Comparing the results obtained from the computational simulation with the CEPEL\'s test results, we concluded that the proposed mathematical model and the deduced parameters can be considered validated. Finally, we suggest a permanent-magnet smooth-pole single-phase motor as an alternative to Written-PoleTM motor. This alternative, even being simpler from the constructional point-of-view, presents operational characteristics similar to the Written-PoleTM single-phase motor.

Este trabalho trata de um estudo teórico sobre o MMPI. Inicialmente, apre-sentamos um levantamento bibliográfico sobre o MMPI evidenciando os seus aspectos construtivos, seu funcionamento, suas características operacionais e suas possíveis aplicações. Em seguida, elaboramos um modelo físico fundamentado nas teorias do Motor de Indução Duplamente Alimentado (MIDA) e do Motor de Histerese (MH), o qual agrega as principais características operacionais do MMPI e reproduz o processo dinâmico de inscrição de pólos na periferia do rotor. A partir deste modelo físico propomos um modelo matemático, baseado na teoria dos circuitos magneticamente acoplados, constituído pelo equacionamento do MIDA, do MH e das fontes de alimentação do estator e do rotor. Deduzimos teoricamente todos os parâmetros necessários para a simulação computacional. Executamos a sua simulação computacional no software Matlab/SimulinkTM, cujos resultados ilustram o comportamento dinâmico das suas tensões, correntes, fluxos e mecânica. Comparando-se os resultados obtidos na simulação computacional com testes laboratoriais executados pelo CE-PEL, concluímos que o modelo matemático proposto e os parâmetros deduzidos podem ser considerados validados. Finalizando, sugerimos um motor monofásico de pólos lisos a imãs permanentes como uma alternativa mais simples do ponto de vista construtivo, porém com características operacionais semelhantes às do MMPI. / This work deals with a theoretical study on Written-PoleTM single-phase motor. Initially, we present the results from the bibliographical research on the Written-PoleTM motor, evidencing its constructional features, operation process, operational characteristics and some possible applications. Afterwards, we elaborate a physical model based in the theories of the doubly fed induction motor and the hysteresis motor, which incorporates the operational characteristic of Written-PoleTM motor and reproduces the written-pole dynamic process. Starting from this physical model we propose a mathematical model, based on the theory of the magnetically coupled circuits, constituted by the set of differential equations deduced from the doubly fed induction motor, the hysteresis motor and the stator and rotor voltage sources. We deduced theoretically all the computational simulation necessary parameters. We perform its computational simulation in the software Matlab/SimulinkTM, whose results illustrate the dynamic behavior of its voltages, currents, fluxes, torques and speed. Comparing the results obtained from the computational simulation with the CEPEL\'s test results, we concluded that the proposed mathematical model and the deduced parameters can be considered validated. Finally, we suggest a permanent-magnet smooth-pole single-phase motor as an alternative to Written-PoleTM motor. This alternative, even being simpler from the constructional point-of-view, presents operational characteristics similar to the Written-PoleTM single-phase motor.

Orientador: Milton Dias Junior / Dissertação (mestrado) - Universidade Estadual de Campinas, Faculdade de Engenharia Mecânica / Made available in DSpace on 2018-08-17T18:54:27Z (GMT). No. of bitstreams: 1 Miyasato_HugoHeidy_M.pdf: 3357683 bytes, checksum: 9fcd8bd237500580084498c606879165 (MD5) Previous issue date: 2011 / Resumo: Fenômenos de ruído, vibração e sua severidade (NVH) são uma grande preocupação da indústria automotiva desde o século 20. A fim de atingir uma vantagem competitiva, as montadoras têm se focado na melhora do desempenho de NVH dos seus produtos para lidar com um cenário de mercado global competitivo. No intuito de verificar o comportamento do sistema durante o processo de desenvolvimento, métodos computacionais são aplicados para encontrar melhores abordagens e na previsão de problemas, economizando tempo e orçamento da empresa gastos na construção de protótipos e testes. Nesse trabalho, gear rattle, um ruído induzido por impacto cuja causa são as engrenagens sem carga da transmissão, será modelado e simulado. É diagnosticado com maior intensidade em veículos com motores diesel em marcha lenta e excitado especificamente quando uma faixa de frequências que causa grande amplitude de vibração nos elementos internos da caixa de câmbio é alcançada. Modelos lineares do trem de potência em ponto morto ou em tração serão estudados, compreendendo as suas características básicas, tais como frequências naturais e modos associados que podem ser representativos do fenômeno. Esse sistema possui elementos com fortes não-linearidades, tais como a rigidez estratificada com histerese da embreagem e a folga entre os dentes dos engrenamentos. Uma caracterização mais realista será incluída no modelo com uma rigidez variante no tempo para o engrenamento helicoidal, utilizado em todas transmissões manuais, com uma componente dissipativa adequada aos impactos. Para verificar condições de operação que podem somente ser avaliadas segundo formulação não-linear, simulações serão realizadas para verificar a eficácia de orientações de solução e propostas de modificação encontradas na literatura / Abstract: Noise, Vibration and Harshness (NVH) phenomena are a great concern of the automotive industry since the twentieth century. In order to achieve a commercial advantage, manufacturers have focused on improving the NVH performance of their products to cope with a competitive global market scenario. To verify the behavior of the system during the design process, computational methods are applied to find a better approach and foresee problems, saving company budget and time spent in prototypes and tests. In this work, gear rattle, a impact-induced noise caused by the unloaded gear teeth inside the gearbox, will be modeled and simulated. It is diagnosed with a higher intensity in diesel vehicle engines at idle speed and in a more specific way excited when a range of frequency that causes large amplitude of vibration in the internal elements of the gearbox is reached. Linear models of the powertrain operating in idle and traction will be studied, in order to understand its basic characteristics, such as natural frequencies and associated vibration modes that could be representative to this phenomena. This system has elements with strong nonlinearities such as the stratified stiffness with hysteresis of the clutch and the backlash between the gear teeth. A more realistic feature will be included in the model with a time variable stiffness for the helical gear mesh, used in all manual transmissions, with a suitable dissipative component for the impacts. To verify operational conditions which can only be evaluated with nonlinear formulation, simulations will be made to verify the effectiveness of solution guidelines and modification procedures found in literature / Mestrado / Mecanica dos Sólidos e Projeto Mecanico / Mestre em Engenharia Mecânica

Orientador: Milton Dias Junior / Dissertação (mestrado) - Universidade Estadual de Campinas, Faculdade de Engenharia Mecânica / Made available in DSpace on 2018-08-22T19:22:01Z (GMT). No. of bitstreams: 1 RoldaoPerestrelo_LeandroTadeu_M.pdf: 15158370 bytes, checksum: 84a10bb14b3381b619db8ff9bb97be9c (MD5) Previous issue date: 2013 / Resumo: O resumo poderá ser visualizado no texto completo da tese digital / Abstract: The abstract is available with the full electronic document / Mestrado / Mecanica dos Sólidos e Projeto Mecanico / Mestre em Engenharia Mecânica

This diploma thesis deals with the possibility of using a concentrated winding in an induction motor and the use of copper bars in a rotor cage. The first part of the thesis explains the basic theoretical knowledge of the operation and principle of the induction machine. In this theoretical part we will learn what is actually a concentrated winding and how it is placed on the stator. The second part is focused on the analytical design of the machine with classical distributed winding and with concentrated winding. The third theoretical part is an introduction to the issue of influencing the motor harmonics. The last final part of the thesis shows differences in operational properties of designed machines.

This work discusses about nowadays problematic of the electronic comutation motors.This work also describes the opportunity of electronic control of these motors. The result of this work is realization of electronic control circuit from discreet components. There also are mentioned is proposal of electronic control board from SMD components. This control board include temperature control with ventilator switching , commutation logic, PWM speed control. In the last part of this paper are results of evaluation measurements of EC motor.

The work deals with creating a DC electric motor drive. The model is composed of electrical power from the engine model and transistor pulse converter load, which are joined together and completed the anchor and regulate the flow control engine speed. Great attention was paid to the determination of losses in the load drive electric vehicles and create a model of electric power load. The real work was verified by an experimental model of an electric vehicle Car4 the available parameters.

Electric drives used in automotive industry are often based on standard DC motor as it is widely recognised as mature and reliable technology. The most common applications of DC motors in automotive industry are starters and wind screen wiper motors. Aim of this thesis is to provide design overview of typical automotive DC motor therefore main parts and features of the machine will be described in detail. Main disadvantage of DC motor is „sliding contact“ between commutator and carbon brushes which introduces source of electromagnetic disturbance and requires regular maintenance. Within this project different aspects of DC motor design and innovation are expected to be tackled including examples of loss calculation.