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Analysis of Trench Insulated Gate Bipolar Transistors
Karlovský, Juraj ; Polčák, Josef (referee) ; Bábor, Petr (advisor)
This thesis is focused on the selection and optimalization of suitable analytical methods for study of TIGBT (Trench Insulated Gate Bipolar Transistor) structures with a use of methods, that depict material composition of the studied sample. The theoretical part contain explana-tions of the analytical methods used for measurements and basic principle of operation of an TIGBT transistor. The practical part contain the methodic of measurements and the evaluation of the obtained data and design of optimal procedures in done experiments.
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Transient Thermal Response Measurements
Stejskal, Martin ; Čala, Martin (referee) ; Beneš, Petr (advisor)
This Bachelor thesis is interested in measurement of thermal parameters of three-phase power switching module. The module contains IGBT power transistors and power diodes, whose dynamic parameters are measured. Based on these measurements, substitute thermal models are constructed, necessary for heat loss simulations and calculations.
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Coilgun
Kovařík, Martin ; Pavlík, Michal (referee) ; Šteffan, Pavel (advisor)
This bachelor’s thesis describes the design and construction of electromagnetic gun for testing projectiles from different ferromagnetic materials with maximal power 19 J. Conventional projectile propulsion mechanisms include the use of compressed air or explosion which places theoretical limits on the maximum muzzle velocity limited by laws of thermodynamics. The electromagnetic coil gun, explores the use of electromagnetism in accelerating projectiles which offers a much higher theoretical limit on muzzle velocity. In addition of an electromagnetic acceleration is possible to regulate output velocity/energy of projectile, and acceleration applied on projectile.
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Converters for HVDC Energy Transmission
Martinec, Roman ; Klíma, Bohumil (referee) ; Červinka, Dalibor (advisor)
The aim of this thesis is to introduce the high-voltage direct current (HVDC) systems used in the world today. The work lists the basic principles of connection between individual HVDC stations, as well as the configuration of the HVDC transmission link. In addition, the work describes the topologies of converters currently in use and also their principal semi-conductor components. In the conclusion of the thesis, the HVDC technology is assessed, including its advantages and drawbacks.
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Microprocessor controlled BLDC motor inverter realization
Mikuška, Martin ; Cipín, Radoslav (referee) ; Knobloch, Jan (advisor)
This bachelor’s thesis goes into electronic commutated motors, their inverters and specific parts of the general pulse converter. Next it is described step-down converters, push-pull converters and the principles that are supported by practical exercises. The next part describes the design of the power transistors driver and problems of galvanic separation by optocouplers.
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Market survey of high power semiconductor devices
Jankovský, Martin ; Rujbrová, Šárka (referee) ; Zmrzlá, Petra (advisor)
Hlavním tématem práce jsou moderní výkonové polovodičové součástky. Jsou diskutovány i rozvíjející se materiály s velkou šířkou zakázaného pasu a jejich elektrické vlastnosti. Práce je pak zaměřena na tyto moderní součástky, včetně jejich teorie, aplikace a dostupnosti na trhu. Dále práce předkládá tabulky jednotlivých zařízení, které jsou nabízeny evropskými předními výrobci polovodičů.
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Iverter for three-phase motor
Mikuška, Martin ; Červinka, Dalibor (referee) ; Knobloch, Jan (advisor)
This master’s thesis goes into design of particular circuits for three phase inverter. Inverter’s control is ensured by digital signal controller MC56F8013 with his program. Principle of control is suggested for individual motors. Inverter design considerate universal use and capability for any three phase motor. Particular blocks are compatible each other.
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IGBT triggered coilgun
Kovařík, M.
The coilgun is a device which ejects small projectiles at great speed only by using electromagnetism with maximal power 1,1kJ. This principle offers a much higher theoretical limit on muzzle velocity against conventional projectile propulsion mechanisms. In addition of an electromagnetic acceleration is possible to regulate output velocity/energy and acceleration applied on projectile. Precise regulation could be achieved with power IGBT transistors used in this project.
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Desing of supplementary coding switching unit
Štefl, Martin ; Štohl, Radek (referee) ; Fiedler, Petr (advisor)
The diploma thesis is dealing with the area of controlling and safety technology for the railway transportation. The problems of the design and practical realization of an functional sample of switching unit supplying the ends of a track circuit are solved here. The switching unit enables the operation of the train control system. The outline of the design is formed by a power switch operated with a microprocessor. In addition, for the increase in safety the switching unit contains a control processor, which is controlling the right function of a work microprocessor and the failure-free state of a power switch.
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