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Single phase induction motor start optimization
Glogar, Jaroslav ; Hájek, Vítězslav (referee) ; Mach, Martin (advisor)
This bachelor thesis deals with the influence of capacitors on a start of a single phase induction machine and start optimization. The first two chapters refer to a theoretical part of the issue, describing construction, the function principle, the torque characteristic. Also used types are named there, a special emphasis is given to a split phase induction motor with the capacitor and auxiliary winding. It also describes the influence of the capacitor to a breakaway torque. The next part studies the analysis of the concrete machine by the laboratory measuring. Results of measured windings resistance, rated operation, load characteristic, mechanical losses and locked-rotor test are stated here. The main part of the thesis is dedicated to an optimization of wiring auxiliary winding, especially for breakaway torque. It is based on creating models in program ANSYS Maxwell, where an analytical calculation in module RMxprt and a calculation per finite element method (FEM) is realised. Three models are demonstrated here. The first one is identical with the measured machine, so with the permanent split capacitor. That model is created to be compared with the measuring. Another model has a capacitor start, and the last one has two capacitors – for start and run. For the last model the rotor cage with a reduced resistance of winding is used.
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Noise sources of single phase induction motor
Knap, Zdeněk ; Janda, Marcel (referee) ; Ondrůšek, Čestmír (advisor)
This bachelor’s thesis is aimed to find sources of acoustic noise on a single-phase induction motors. Main focus is noise of electromagnetic origin and its actual connection to motor parameters. Noise frequencies are the key subjects of this work. Based on this literature research, it includes analysis of real single-phase induction motor in mathematical software MATLAB. In the end, there is a summary of rules for reduction of the noise caused by electromagnetic fields and list of dangerous frequencies for analyzed motor.
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Design and analysis of single-phase induction machine
Souček, Jiří ; Mach, Martin (referee) ; Vítek, Ondřej (advisor)
This thesis deals with the design issues of single-phase induction motors. The content is divided into several basic parts. The first chapter deals with the principle function of single-phase induction motors. In particular, the asymmetry of these machines discussed with regard to the importance of connecting the auxiliary stage and its character. The following part is devoted to the analytical calculation of specific single-phase two-pole motor. I analyzed two-pole motor because at that time there were not available data for six-pole motor from Siemens. The calculation is performed according to the literature, and the resulting parameters are then compared with the model of this motor created by RMxprt. There is model of six-pole induction motor created by Ansoft/Maxwell in third part. This model shows the influence of skew of the rotor slots on the torque of machine. Then I performed measurement of this motor and analyzed of results in the last part.
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Small Induction Motors
Chvatík, Štěpán ; Mach, Martin (referee) ; Hájek, Vítězslav (advisor)
This bachelor‘s thesis deals with a single-phase induction motor and is organized in five sections. In the introduction is briefly described its construction and compared with three-phase induction motor. The first chapter describes the emergence of a rotating magnetic field of motor, methods of obtaining the starting torque, the influence on properties of different types of motors, comparing the torque characteristics of the different types of motors. In the second chapter is discussed permanent-split capacitor induction motor, its calculation and operational optimization. The third chapter deals with the determination of general principles of calculation and calculation method of single-phase induction motor with auxiliary winding. The fourth part verified the accuracy of these procedures on the selected motor when we performed calculations based on the input parameters of the motor, and after that these calculations are compared with the output parameters which are prescribed by the manufacturer. Verification of the relevance of declared parameters is supported by measurements on the mentioned device and their evaluation.
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Energy parameters of single-phase induction machines
Janáček, Martin ; Mach, Martin (referee) ; Hájek, Vítězslav (advisor)
The master's thesis deals and introduces a single-phase inductions machines, the principle of operation, types of design and operating conditions. This thesis includes analysis of individual losses in the machine and reduce the possibility of different ways. After a theoretical proposal for reducing losses are measured by mass-produced single-phase induction machine. Further machine modifications proposed for reducing losses in the stator windings and designed a prototype machine with the adjustment of the magnetic circuit to reduce iron losses made by ATAS elektromotory Nachod a.s. The results are supplemented by a simulation using software Maxwell RMxprt and finite element method (FEM). Finally, they are compared to each machines modifications mainly in terms of energy consumption.
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Single-Phase Induction Motor
Vácha, Pavel ; Lapčík, Josef (referee) ; Hájek, Vítězslav (advisor)
The bachelor work is concerned the thesis of a single-phase induction motor that´s perpetually more used in all over the world. Its aim is assembling the information about this type of motor and its calculation. The content of the first part is the theoretical analysis of a single-phase induction motor and acquirement ways of the stroke moment. The practical part contains a basic schema calculation of the single-phase induction motor with an auxiliary phase and a processing demonstrate example of calculation of the single-phase induction motor with concrete parameters along suggested process. In the conclusion there is the evaluation of the whole process.
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Losses of capacitor run induction motor
Štaffa, Jiří ; Hájek, Vítězslav (referee) ; Mach, Martin (advisor)
This project deals with increasing efficiency of one phase induction motor with permanent split capacitor. We can whole thesis divide into two parts, the first one is basic and the second is interested in analysis and measurement. First part handles with construction of single phase induction motor, explanation of function principle, start and run of motor. Calculating of efficiency including type of losses, which reduce efficiency. Second part concerns analysis losses including moment load characteristic, motor measurement while rotor is locked, with no load operation, measuring mechanical and additional losses. Further there will be measured useful values for creation model for simulation (reactance of windings etc.). Than will be the model created in ANSYS Maxwell with module RMxprt. After analytic calculation in RMxprt and using Finite Element Method (FEM) load characteristics will be compared together. This comparison gives us information about accuracy of model for simulation. Simulation and measurement will be carried out on another engine with high quality ferromagnetic material used for magnetic circuit of motor. Further will be done simulation of motor with modifications shown in previous chapter for high efficiency.
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Single-Phase Induction Motor Calculation
Volf, Lukáš ; Ondrůšek, Čestmír (referee) ; Hájek, Vítězslav (advisor)
This work is in the first chapter deals with the basic properties of single phase and three-phase induction motors. The following describes the procedure for obtaining a starting torque of single-phase asynchronous motor. In the second part of the calculation is carried out single-phase induction motor with a permanently connected capacitor and its control, calculation of output values, the program proposed solution to this calculation in Microsoft Excel 2007 and calculated parameters of the development of methods of calculation were compared with measured, the values supplied by ATAS Náchod.
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Single-Phase Induction Motor Calculation
Vácha, Pavel ; Vítek, Ondřej (referee) ; Hájek, Vítězslav (advisor)
The master´s thesis deal with the thesis of a single-phase induction motor that is more and more used all over the world. Its aim is assembling the information about this type of motor and its calculation. The content of the first part is the theoretical analysis of a single-phase induction motor and acquirement ways of the stroke moment. Than the work contains a project of basic schema of the single-phase induction motor with an auxiliary phase. The practical part is devoted to an elaboration of demonstration example of the single-phase induction motor with concrete parameters calculation, its method was projected before. Than there is practising successived measuring on the motor of the same parameters made firm EMP s.r.o. Slavkov by Brno in this part. In the conclusion there is the evaluation of the whole process with reached results.
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Utilization of infrared camera for temperature measurement of electrical machines
Líbal, Jan ; Aubrecht, Vladimír (referee) ; Kuchyňková, Hana (advisor)
The master‘s thesis deals with utilization of infrared camera for temperature measurement of electrical machines. The first part describes non-contact temperature measuring, the second part describes principle of sensors that evaluate quantity of incident infrared radiation. In the next part there is termovision camera SAT-HY 6800 presented and the instructional manual for SAT Report computer programme created. This computer programme is used for analyzing of termovision pictures from the SAT-HY 6800 termovison camera. The chapter 7 describes temperature measuring of one-phase asynchronous motor type J22TO484. The chapter 8 describes temperature measuring of semiconductor components of EC motor G6 series. Both of these motors are produced by ATAS elektromotory Náchod a.s. The last part of the thesis describes creation of animation of one-phase asynchronous motor type J22TO455. The animation was created in 3ds Max computer programme.
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