National Repository of Grey Literature 78 records found  1 - 10nextend  jump to record: Search took 0.00 seconds. 
Thermal properties of automotive light sources - LED
Bárta, Jiří ; Mach, Martin (referee) ; Janda, Marcel (advisor)
The aim of this theses is to summarize the basic information about thermal properties of automobile lighting sources. The main topic is a LED diode. A model of a LED diode is going to be created in Inventor. A simulation of Joule's losses will be performed in Ansys Workbench Transient.
Equipment for position adjustment of brushes holder
Škoda, Josef ; Hájek, Vítězslav (referee) ; Mach, Martin (advisor)
My bachelor’s thesis is aimed at problematics of lifetime of DC motor. After a theoretical analysis the improvements were designed which can adjust the right position of the brushes and this will also improve commutation and the general properties of the DC motor.
Design of Interior Permanent Magnet Machine
Kuna, Kristián ; Mach, Martin (referee) ; Bárta, Jan (advisor)
For the development of synchronous machines with permanent magnets were essential the development of power electronics, improvement of the parameters, as well as the increase of the availability of permanent magnets. The purpose of this thesis is to compare the different rotor topologies in synchronous machines with inside permanent magnets and to develop the basic electromagnetic design of synchronous machine with inside permanent magnets.
Process a review of the specified electrical equipment
Lanc, Rudolf ; Mach, Martin (referee) ; Veselka, František (advisor)
The revision of the electrical equipment means verifying the state of the equipment concerning its safety. The aim of the Bachelor Thesis is the revision of the selected electrical equipment. The particular equipment will undergo a revision, measurements, supervisions, and tests, which are subject of the norms. A revision report will be issued as a result of the established facts, in which possible failures will be described. Further on eventual risks will be explained and techniques how to eliminate them proposed.
Thermal analysis of a small induction machine
Holcman, Marek ; Toman, Marek (referee) ; Mach, Martin (advisor)
This thesis deals with the thermal analysis of a small asynchronous motor with a power of 600 W. The motor losses were determined first by the program RMxprt, and then by laboratory measurement. Temperatures in engine are calculated using the thermal resistance method. For analytical calculation of motor temperatures, a simple program was created using the Matlab computation program. Using the created program and determined losses, engine temperatures were calculated, which were then verified by measurement.
Efficiency improvement of single-phase induction motor
Bořil, Michal ; Mach, Martin (referee) ; Vítek, Ondřej (advisor)
The subject-matter of the Bachelor Thesis is increasing efficiency of a single-phase asynchronous motor. The thesis is divided into several parts and comprises information concerning the subject-matter. The first part deals with the theoretical principle of all rotary machines from three-phase motors to single-phase motors, describing the principle, design and functionality of these devices in detail. In the second part, a new motor model is designed on the basis of the label values of a specified asynchronous motor and adapted to have the highest possible efficiency. The model of the motor is created in the ANSYS RMxprt program and compared to a model of the specified motor, which is also created on the basis of parameters of the technical documentation in the same program. In the last but one part of the Bachelor Theses, several models are created with proposed modifications of the motor to increase efficiency and compared to the specified motor. This part focuses on an analysis of individual types of losses that influence the efficiency and power of the motor. In the last part of the Bachelor Thesis, in the ANSYS Maxwell program, a model of the specified motor and a model of the motor with the highest efficiency is simulated with the use of FEMM. The obtained information of the models from the Maxwell program is compared to information obtained from the RMxprt program and evaluated.
Increase of efficiency of a single phase induction machine
Muczka, Vojtěch ; Klíma, Jiří (referee) ; Mach, Martin (advisor)
This thesis is dedicated to efficiency increase of one phase induction machine through material change of induction cage and rotor slot shape optimization under the condition of maintaining the same locked-rotor torque. In the first part of this thesis is the explanation of induction machine principles. Next is the comparison of measured and simulated parameters of small one phase machine from ATAS company. The following part is dedicated to the analysis of rotor slot shape and ring size influence on machine parameters when using pure aluminum instead of resistive alloy. The next chapter deals with slot shape optimization in the program RMxprt, controlled by genetic algorithm written in MATLAB interface. In the final part are the resultant slot shapes simulated in Ansys Maxwell using finite element method and then the measured, simulated and expected parameters are compared.
Diagnostics of rotating electric machines
Soukup, Patrik ; Mach, Martin (referee) ; Janda, Marcel (advisor)
The thesis Diagnostics of rotating electric machines deals with the theory of diagnostics of rotating machines, focusing especially on the diagnosis of asynchronous motors of high power. Due to the importance of maintaining the trouble-free condition of these machines with regard to serviceability, the importance of their diagnosis is growing. Due to inappropriate working conditions or for many other reasons, different types of malfunctions may occur in the machine. The list and the way of occurrence of possible failures are included and explained in this thesis. With the growing age of the machine, it is important to check the insulation status through insulation testing. These tests are performed in the practical part of the thesis and the results are presented. In the case of asynchronous machines, each anomaly leaves a signature in the form of an electrical, magnetic or vibrational signal. These signals are analyzed and evaluated using a specific measuring equipment with the intention of deciding on the current state of the machine. Motor current signature analysis (MCSA) is considered to be the main diagnostic method of asynchronous machines in this thesis. This method is described in detail in this paper and is being applied in electrical engineering.
Impact of rotor on a small induction machine efficiency
Stuchlý, Karel ; Janda, Marcel (referee) ; Mach, Martin (advisor)
The aim of this master thesis is optimization of the rotor in the terms of efficiency. An analysis of the effects of rotor parameters is performed by RMXPRT. A genetic algorithm is created to find the optimal solution. Solutions are evaluated and adjusted according to the results. Measurements on the actual machine are performed and evaluated to verify the functionality of the simulation models.
Induction machine with outer rotor
Chvatík, Štěpán ; Bárta, Jan (referee) ; Mach, Martin (advisor)
Induction machine; outer rotor; water pump; thermal network; thermal analysis; optimization; electromagnetic model; finite element method; thermal insulation class

National Repository of Grey Literature : 78 records found   1 - 10nextend  jump to record:
See also: similar author names
1 MACH, Marek
4 MACH, Michal
4 MACH, Milan
2 Mach, M.
4 Mach, Michal
4 Mach, Milan
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