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Influence of rotor slots number on a small induction motor losses
Palsovics, Norbert ; Hájek, Vítězslav (referee) ; Mach, Martin (advisor)
The aim of this semester work is to analyze the losses of induction motor, according to their measure, use programs using the finite element method for the detection of the motor and the subsequent evaluation and comparison of the results obtained. The first part deals with the general AM, losses and measure their losses. The next section is very Lossmeasurement submitted asynchronous motors. The measured two machines have different characteristics in the sheet. The following section is calculating the losses using the finite element method using ANSYS Maxwell and RMXprt.The next part is the analysis of motor losses with a different number of rotor bars. This section is addressed to the models developed and validated by measuring the actual machine.
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Increase the Rated Voltage of the Vehicle's Circuit - Study
Horák, Richard ; Vítek, Ondřej (referee) ; Hájek, Vítězslav (advisor)
The point of this work is evaluate the parameters of automotive electric system and according to these properties choose suitable norm of higher voltage, propose conception of system and with analyst calculation suggest basic granary parameters of higher voltage. This calculation is enclosed. In the work is mentioned a historical development of required escalation in system and therewith connected changes of specified levels of system tension. As an exemplification of escalation calculus hereof electrical equipment, installed onto motor powered vehicle, are mentioned in attachment schema's of four vehicles Škoda Auto a.s.
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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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Engine Motormanagement Software
Huška, Lukáš ; Kuchyňková, Hana (referee) ; Hájek, Vítězslav (advisor)
This master thesis deals with ignition systems which are used in cars vehicles with gas engines and also with setting of the best moment of ignition of gasoline-air mixture in cylinders of engine. Ways of gas injection at diesel engines and their control systems are also described in this thesis. Next chapter deals with control unit and describes main actions which are necessary for today’s motor vehicles. As illustration is used example of succession of actions which are necessary for calculation and setting regular value of pre-ignition. At the end is shown animation, which can be used for practice lessons in a subject Automobile Electric and Electronic Systems as a example. It will simplify understanding of described activities which are all accomplished by central control unit. For purposes of laboratory lessons is in this thesis also discussed measuring of engine performance with changes of parameter of central control unit.
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Improvement Power Parameter of Small Induction Motors
Kuda, Roman ; Vítek, Ondřej (referee) ; Hájek, Vítězslav (advisor)
This master´s thesis treats of all asynchronous motor. The project is about type and distribution motors, about differences between three-phase and single-phase machines and efficiency. In one of the chapters describes a particular type of engine with all the parametersfrom the manufacturer. This engine is completely analyzed and it is measured in detail. Then the project deals with the division, the calculation of losses and subsequent possibilities to increase the efficiency of induction motor. In the last chapter is calculation of single-phase motors, based on the engine produced.
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Revision of belt conveyor drive
Kledus, Erik ; Hájek, Vítězslav (referee) ; Veselka, František (advisor)
The theme of the bachelor work is the revision of the conveyor belt drive. It contains a description of the belt drive, its distribution and possible malfunctions. It also contains the results of the revision. It deals with the formation of static charge and its elimination. Bachelor work also includes measurements and tests performed on conveyor drive.
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Consequences of increasing the efficiency of small motors.
Buchta, Martin ; Mach, Martin (referee) ; Hájek, Vítězslav (advisor)
This bachelor thesis deals with the consequences of increasing the efficiency of small asynchronous motors up to 1kW. This work is written in response to ever-increasing demands on minimal efficiency for asynchronous engines, whether through European Union legislation or just competition between manufacturers. The aim of the thesis is therefore to evaluate measures to increase efficiency. The evaluation refers to the consumption of the active material and the weight of the individual treatments. For the evaluation itself, it was necessary to first study the final papers written at this faculty concerning the efficiency of small asynchronous motors. After studying these works, it was necessary to select those measures which, with their minor costs, are least demanding, lead to an increase in efficiency of at least 1% and also to compare these measures with each other. The asynchronous engine of ATAS a.s. with a power of 600W. Three measures to improve efficiency were selected for this engine, mainly related to the diameters of the winding conductor used, the change in the number of threads, and, possibly, the extension of the length of the circuit. These three measures made a rough financial analysis of the price for active material. The prices of active material were found from manufacturers or suppliers.
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Options for increasing the efficiency of small motors.
Kusý, Karel ; Janda, Marcel (referee) ; Hájek, Vítězslav (advisor)
This bachelor thesis concerns itself with the possibilities of achieving higher efficiency of small asynchronous motors and their manufacturing costs. The following chapters describe the design, function and principles of speed regulation of the asynchronous motor. Next, losses that occur during motor operation and ways of reducing them, are described. The last chapter of the thesis addreses factors that influence the manufacturing costs of the asynchornous motor and evaluates the material costs of one modified motor.
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