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Design and measurement of a small induction motor
Fišer, Jan ; Klíma, Jiří (referee) ; Mach, Martin (advisor)
This bachelor thesis deals with design and measurement of a small induction motor. The introduction describes a structure and an operating principle of the induction motor. The following part deals with analytical calculation of three-phase induction motor‘s properties. Next are executed an analytical calculations and a finite element method calculations by the Maxwell software. In the end are these calculations compared with results from measurement.
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Losses analysis of small induction motors
Šišák, David ; Cipín, Radoslav (referee) ; Mach, Martin (advisor)
This bachelor thesis deals with analysis of losses of small induction motors. The first part of the project introduces the principle of operation and construction of induction motors. Furthermore, there is dealt with issuing each losses, their origin and disposition in induction motor. The project continues performing the analytical computation of the losses of induction motor with an output of 600 W. The losses of the motor are also calculated in the program Maxvell RMxprt. In the practical part, there are the results of the laboratory measurement on that motor and measurements concerning two another small induction motors different in nominal power. In the last part, there are compared the results of individual motor losses, obtained by computations and measuring. There are also compared the measuring results of losses of chosen motors depending on the nominal output.
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Design and modernization of automotive starter
Bednář, Vojtěch ; Mach, Martin (referee) ; Hájek, Vítězslav (advisor)
The work deals with modernization of an automobile starter. In first and second part, we can find the analysis of types of starters according to construction and the analysis of gear of a starter. In third part, there is the analysis of electromagnetic layout of direct current motor with permanent magnets according to given parameters which is the gear of given starter.
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Reluctance machine with permanent magnet on rotor
Kubín, Tomáš ; Mach, Martin (referee) ; Ondrůšek, Čestmír (advisor)
This master’s thesis is focuses on the reluctance motor, especially on the design of the rotor. It shows the development of the construction of rotors of reluctance motors. Furthermore, it shows the principle of reluctance machine and its basic mathematical description and the principle of improving the machine parameters by inserting permanent magnets into the rotor. It offers an overview of patents available from 2000 to present. Also it deals with the design of the rotor with permanent magnets for stator of induction motor.
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Impact of core length on efficiency of a small induction machine
Žalkovský, Antonín ; Toman, Marek (referee) ; Mach, Martin (advisor)
The bachelor’s thesis deals with design issues of small induction machine, analyze the effects of changing length of the magnetic circuit on its efficiency. The theoretical part describes structural components of induction motor and working principle. The practical part focus on calculation of equivalent model of assigned induction machine for determined range of magnetic circuit lengths and the number of conductors in the stator groove. Follows calculations of torque characteristic and current characteristic, calculation of losses in all parts of induction machine and determine the efficiency. Another part of thesis is aim at measurement of original induction motor and motor with lengthened magnetic circuit. The last part is focused on analysis and comparing the calculated values.
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Possibilities of elimination of electrostatic charge generation in the belt conveyor drive
Pavluš, Ondřej ; Mach, Martin (referee) ; Veselka, František (advisor)
The purpose of revision of electrical devices is to assess the device in regard to its safety. The main goal of this bachelor thesis is a revision of an electrical conveyor belt engine. We focus on safety from injury caused by electric current due to malfunction and methods for detection and prevention of electrostatic charge buildup. We conducted an inspection and prepared the required norms and measurements. After a careful analysis of results we determined, whether or not the device meets the safety requirements specified by the relevant industry norms. Based on the insights from the inspection, we took necessary precautions with regard to static electricity buildup.
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Investigation on operating characteristics of multi-phase machine
Kuna, Kristián ; Mach, Martin (referee) ; Bárta, Jan (advisor)
S postupom času sa elektrotechnicky průmysl posouval dopředu. Přišel rozvoj v automobilovém průmyslu, leteckém průmyslu, navigácí a dalších odvětvích. S rozvojem automobilového a leteckého průmyslu se zvětšila potřeba pro motory s vyskou spolehlivostí. Tenhle fakt zapříčinil rozvoj motorů s vćero fázami. Tyto stroje mají za úkol zvýšiť spolehlivost ale zároveň zachovat/zvýšit výkon stroje.
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Analysis of operating characteristics of electrical machines with variable number of poles
Rosendorf, Jakub ; Mach, Martin (referee) ; Bárta, Jan (advisor)
This work describes the current state of knowledge of electrical machines with pole changing capabilities, their advantages and potential disadvantages. It also focuses on design and construction aspects of these machines, including ways of controlling them. Finally, this work deals with the emergence of new transient phenomena related to changing of poles and under what conditions they occur. This work also shows the analysis of the operational properties of the electromagnetic model and the subsequent phenomena associated with the switching of pole configurations from two-pole to four-pole.
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