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Design of permanent magnet synchronous motors
Bureš, Petr ; Cipín, Radoslav (referee) ; Vítek, Ondřej (advisor)
Given today’s trend with environment being very important, there has been an ongoing attempt in the rotating machine industry to create machines with highest efficiency possible. And so, permanent magnet synchronous machines represent types of machine with very high efficiency and are gradually replacing other machines in many applications. This work deals with familiarization of the properties of permanent magnet synchronous motor as well as typical design choices. The main focus of this work is the design of permanent magnet EC motor and following comparison of results obtained from analytical design and analysis in the RMxprt program. Finally, the results of design methods are compared.
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Efficiency Improvement of Three Phase Induction Motor
Žák, Ondřej ; Mach, Martin (referee) ; Vítek, Ondřej (advisor)
This bacelor thesis looks into problematics of efficiency of induction elektromotors. Due to present tendence of permanently encreasing efficiency, this topic is very actual. How to encrease efficiency but not to encrease material and production cost too much? This is the daily question of every producer of induction elektromotors. This thesis has a target to bring closer understanding of this problematics and describe alternatives, which is possible to follow. On choosen elektromotor produced by ATAS elektromotory Náchod a.s. is made an comparison of analytic calculate, calculate of software RMxprt and Maxwell 2D and real measuring, which refes about limits of individual calculatin methods. Then the design of changes with new calculate is provided and comparison of all results.
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Minimizing induction motor losses
Trn, Ondřej ; Cipín, Radoslav (referee) ; Vítek, Ondřej (advisor)
This bachelor thesis is aimed at reducing losses of three-phase induction motor. The first part deals with the construction and principle of engine operation. Another part of the thesis is focused on the calculation of asynchronous motor parameters according to technical documentation. Subsequently, the calculated parameters are verified using the Ansys RMxprt program. The third part of the thesis is focused on the detection of losses from the motor measurement. The last part focuses on engine adjustments to reduce losses.
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Proposal of a Business the Foundation of a Restaurant
Boček, Petr ; Vítek, Ondřej (referee) ; Bayerová, Vladimíra (advisor)
The bachelor thesis is a proposal of the entrepreneurial intention to establish a restaurant. Our restaurant with a focus on tourists and cyclists will be in Vilémovice. The branch of business belongs to the hospitality industry. The work consists of three parts. The theoretical part will be based on literary research and serve to define basic concepts. The analytical part will deal with the market analysis and other factors that could improve our business. The final part will deal with the proposal of the business plan itself and its economic success.
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Modeling of torque-speed characteristics of induction motor
Michalík, Marek ; Chrobák, Petr (referee) ; Vítek, Ondřej (advisor)
This master thesis deals in first part with basic theory of an induction motor and principle of function. It also includes theory about higher harmonics of magnetic field and how asynchronous and synchronous torques are created. Various ways how to decrease effect of these torques are suggested. These findings are later applied in practical analytical calculation in second part, in which all parameters of motor are calculated from given dimensions of motor from technical documentation. This is done for basic and higher harmonics. After that a model of this motor was created in RMxprt program, which also calculated all parameters of this motor and created torque characteristic. This motor was also modelled in ANSYS Maxwell 2D. Additional simulations for finding out influence of harmonics on torque characteristic were also done in this software. Torque characteristic of motor was also practically measured in laboratory. All results were compared and evaluated.
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Calculation of parameters of small induction motor
Vojče, Zbyněk ; Cipín, Radoslav (referee) ; Vítek, Ondřej (advisor)
This bachelor thesis deals in the first part with a construction and a principle of function of an induction motor. In the second part deals with an actual analytical calculation of three-phase low power induction motor. Is performed a simulation in a program Ansoft RMxprt, which calculated the characreristics of the motor analytically and simulation in program Maxwell 2D by finite element method. The aim of the work is to compare results of simulations with results of analytical calculation.
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Business Plan
Vítek, Ondřej ; Konečný, Marek (referee) ; Koudelková, Petra (advisor)
This thesis has been elaborated as a proposal of a business plan for establishment of a small-scale production company in the area of sitting furniture without any inner reinforcement. The business activity is supposed to be run as only licenced at the start with a perspective to subsequently change into a limited liability company as a legal entity. The thesis has been subdivided into: theoretical part, which clarifies fundamental notions and limits the issue of the practical part, which contains the business plan itself, marketing strategy and the prospects of realisation of this business intention.
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Analysis of concentrated windings of PMSM
Menoušek, Lukáš ; Cipín, Radoslav (referee) ; Vítek, Ondřej (advisor)
This thesis deals with the design, principles of permanent magnet synchronous machines and an analysis of their properties. As part of the work is done familiarization with the materials of permanent magnets and their arrangement, as well as construction of the engine where they are discussed types of winding machine configuration, types of motors with permanent magnets and the list of implemented solutions. In the next part of this work is performed analytical calculation of the two types of engines, with concentrated winding, created models based on calculations in FEMM focusing on the creation of spatial harmonics. Further the model in RMxprt and data from the simulations were compared with analytical computation. Finally the model was created in Maxwell and compared with the analytical results of calculation and simulation in RMxprt program. For this model was created analysis of losses in permanent magnets.
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Eccentricity and broken rotor bars of induction motor
Magic, Matej ; Janda, Marcel (referee) ; Vítek, Ondřej (advisor)
Thesis presents the possibilities of diagnostics of induction motor using vibration measurements. Basis of the work is monitoring of vibration changes in case of eccentricity and interruption of rotor bars in induction motor. One part of the thesis is the measurement and processing of measured data from damaged motors. The result should be comparison between processed data, reference induction machine and computer simulation of motor.
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