National Repository of Grey Literature 81 records found  1 - 10nextend  jump to record: Search took 0.01 seconds. 
BLDC motor control under load
Macháček, Jan ; Otava, Lukáš (referee) ; Pohl, Lukáš (advisor)
The bachelor thesis is focused on sensor control of BLDC motors by FOC (Field Oriented Control) method. In the first part of the thesis is the BLDC motor powered by ESC (electronic speed controller) by ST Microelectronics. In the second part is used own maked ESC. Both ESCs encompasses STM32F303 microcontroller specially fitted for BLDC motor control. In this thesis is used BLDC motor with twenty-two poles with inbuild magnetic rotary encoder. In the next part is described testbed for motor reaction torque testing during breaking in realation to connected load and load charakteristice is measured and listed. Reaction torque of motor is measured by sensor of mechanical stress. Furthermore is described function of active supply bus limiter.
Renewable Energy Auction Schemes
Jörka, Lukáš ; Macháček, Jan (referee) ; Radil, Lukáš (advisor)
The bachelor thesis deals with the current trend in the field of support for renewable energy sources – the transition from fixed payments to auction mechanisms. Firstly, the thesis describes principles of auctions in the field of RES support and capacity mechanisms. Subsequently, there are described advantages and disadvantages of auctions for RES support and defined their basic elements. This thesis deals with the current state of the global RES market and the description of the current state of the auctions implementation in Europe with focus on the auctions held in Germany and the United Kingdom. Furthermore, the thesis deals with the current state of the RES market in the Czech Republic describing the development of RES support in the past, the current situation and expected future development. The last chapter is devoted to the fictional economic model of wind park, for which the economic evaluation by the NPV method is performed for different values of the input parameters.
Power system model with the hydrogen storage
Vávra, Robert ; Macháček, Jan (referee) ; Radil, Lukáš (advisor)
The objective of this thesis is creation of power system model with hydrogen storage in open source program Open Modelica. Thesis contain’s whole design of each part of the system, power source, electrolyser, tank, block of methanation and theoretical basis for they creation.
The use of advanced composite materials for the design of concrete structures
Macháček, Jan ; Matušíková, Anna (referee) ; Girgle, František (advisor)
The diploma thesis deals with the design of concrete structures reinforced by FRP according to ACI, fib, CSA and EC2 regulations, which are stressed by a shear force. The diferences between steel rebar and FRP reinforcement were described, in particular its mechanical degradation over time and a different stress-strain diagram. Furthermore, shear capacity calculations were performed according to the regulations and compared with the real tests. Then the parametric analysis of shear strength was performed. In the practical part, the design of concrete floor slab structure supported by the pillars and walls was performed. The upper reinforcement of this slab was designed with FRP and the lower with steel rebar. Double-headed studs were used as a punching shear reinforcement.
Aspects of speed development of youth rugby players
Macháček, Jan ; Kaplan, Aleš (advisor) ; Feher, Jan (referee)
Thema works: Speed development of youth rugby players Student: Jan Macháček Supervisor: odb. as. Aleš Kaplan Aims: To define, based on the literature search, the issue of speed development of young rugby players in rugby sevens. By using a literature research, to find and define concepts of speed in sports, in athletics training, and in rugby in youth categories. Methodology: A literary search method of many different sources together with own knowledge and experience from athletics and youth sports training helped to describe the outline of the main topic. This thesis briefly analyzed and subsequently described the possible training process of speed development of young rugby players, in a typical Czech sports club, taking into account the typical sporting regime. It subsequently designed possible training programs for U6 - U20 categories, with added speed development exercises as well as modified current exercises to develop speed efficiently. Results: Based on the literary research, the basic description of the issue was delivered, using the knowledge and experience in youth sports and athletics training. This work briefly analyzed and subsequently described the possible training process of speed development of various age groups of rugby players, in a typical Czech sports club, taking into...
Design and construction laboratory exercise with fuel cell
Mátl, Michal ; Radil, Lukáš (referee) ; Macháček, Jan (advisor)
The aim of my work is to study a fuel cell and to map out the situation it the contemporary world and Czech market and it also includes a laboratory exercice. Basic problems of the fuel cell and its contemporary state are discussed in my thesis. It is concluded with a laboratory exercice.
Design and construction laboratory exercise with fuel cell
Mátl, Michal ; Radil, Lukáš (referee) ; Macháček, Jan (advisor)
The aim of my work is to study a fuel cell and to map out the situation it the contemporary world and Czech market and it also includes a laboratory exercice. Basic problems of the fuel cell and its contemporary state are discussed in my thesis. It is concluded with a laboratory exercice.
The role of the radiological assistant in the radiotherapy of prostate cancer
Macháček, Jan ; Jirkovská, Michaela (referee) ; Malinová, Běla (advisor)
This bachelor's thesis "The Role of the Radiological Assistant in the Radiotherapy of Prostate Cancer" deals with a malignant disease of prostate which represents the most common type of cancer of adult men. In preface of my work, I concentrate on anatomy and function of prostate, epidemiology, disease symptoms and I so describe the way of diagnosis (PSA, DRE, TRUS, biopsy, radioisotopic scintigraphy, CT, MR and cystoscopy) here. The extent of tumour (staging) and clinical stage of disease (TNM classification, level of tumour differentiation) are very important at prostate cancer too. In realm of the curative strategy, I write about the surgical treatment, the possibility of radiotherapy, and about the hormonal treatment and the chemotherapy in the end. Especially I want to remark a daily working content of the radiological assistant at workplace of the radiological oncology (localization, planning CT examination, contouring, radiotherapy plan simulation, daily patient positioning and irradiation on linear accelerator) and equipment needed to radiation therapy (simulator, planning CT scanner, linear accelerator). In the end of my work I concentrate on the prognosis of prostate carcinoma and why it is important to do the preventive examination (screening) of this disease. The Faculty Library, Hospital Motol...
Concrete flat slab supported by columns
Macháček, Jan ; Strnad, Jiří (referee) ; Perla, Jan (advisor)
The aim of this bachelor’s thesis is a structural design of a reinforced concrete point-supported slab for the second floor construction of a hospital. Software RFEM was used for modeling of internal forces, the results were verified by equivalent frame method and moment coefficient method. According to the RFEM results a tension reinforcement and slab shear reinforcement were designed. The deflection was manually calculated. Afterwards, a reinforcement drawing was made. The calculations correspond with ČSN EN 1992-1-1 a ČSN 73 1201.
Waste utilization
Čech, Roman ; Suzová, Jana (referee) ; Macháček, Jan (advisor)
In this task we will talk over the problems in this current society from the aspect of waste production and treatment in European Union. We will classify the waste distribution to the categories, we will focus for the legislatives and the standards of waste management. Also we will preview the production statistics and waste logistic in the Czech Republic and EU. We will focus even for the waste processing like a material for the energy production and development of waste economy hypothesis.

National Repository of Grey Literature : 81 records found   1 - 10nextend  jump to record:
See also: similar author names
16 MACHÁČEK, Jan
1 MACHÁČEK, Josef
8 Macháček, Jakub
5 Macháček, Jaroslav
12 Macháček, Jiří
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