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Determination of closing valve control moments
Benda, David ; Vosynek, Petr (referee) ; Hnízdil, Milan (advisor)
This bachelor thesis deals with the calculation of the torque on the output shaft of the four-concentric butterfly valves and experimental measurement of this torque on real manufactured valves. At the beginning is carried out a brief research, the purpose describe the basic components of the butterfly valves, its production variants of the offset disc, eventually types of fittings to piping. The main part describes the partial torque occurring on the individual components. Following data from the performer measurement and at the end are compared obtained results.
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Analysis of steel grade influence on small induction machine efficiency
Plíšek, Oldřich ; Klíma, Jiří (referee) ; Mach, Martin (advisor)
The theoretical part of the bechelors thesis examining the impact of the material of the magnetic circuit on the efficiency of induction motors is devoted to analysis of the induction motor and its losses. It also describes the measuring, including calculations of individual losses. Another theoretical part examines the impact of specific losses on the magnetization characteristics of assessed laminations. The practical part includes laboratory measurements of single phase and three phase motors ATAS Electromotory Náchod brand with multiple types of laminations. Measured values are used to calculate individual losses, which are later mutually compared. Models of measured motors with multiple types of laminations are simulated with the aid of ANSYS Maxwell RMxprt program. Analysis of engines with specific types of laminations are performed with the aid of analytical calculations. Results of calculations are compared with simulated and measured values.
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Advanced Control Algorithms of Powertrain Units
Špičák, Milan ; Puškár, Michal (referee) ; Slimařík,, Dušan (referee) ; Kučera, Pavel (referee) ; Píštěk, Václav (advisor)
This thesis describes computational control of vehicle powertrains using common variable, engine torque. The thesis is divided into three main parts. The first one shows design of methods for torque estimation using known or measured variables on the vehicle. The second part contains design of powertrain control algorithm utilizing the engine torque as a common variable among individual modules. The third part describes experimental optimization of the longitudinal acceleration of a vehicle using torque control.
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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.
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Analysis of possibilities to improvement induction motors efficiency
Novotný, Jiří ; Hájek, Vítězslav (referee) ; Mach, Martin (advisor)
In the first part of the master’s thesis dealing with the increasing efficiency of induction motors there are briefly presented basic information about induction motors, followed by an overview of the losses of induction motors. The next part deals with the ways to increase efficiency of induction motors without increasing tooling costs. The practical part consists of four measurements of four induction motors, with their various mechanical adjustments to make comparing benefits of these modifications possible. The measured results are compared by a finite element method in Maxwell 2D Design program, in which the same motors are simulated as measured. Theoretical knowledge about the increase of efficiency is practically applied while being implemented in the simulations.
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|
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Determination of closing valve control moments
Benda, David ; Vosynek, Petr (referee) ; Hnízdil, Milan (advisor)
This bachelor thesis deals with the calculation of the torque on the output shaft of the four-concentric butterfly valves and experimental measurement of this torque on real manufactured valves. At the beginning is carried out a brief research, the purpose describe the basic components of the butterfly valves, its production variants of the offset disc, eventually types of fittings to piping. The main part describes the partial torque occurring on the individual components. Following data from the performer measurement and at the end are compared obtained results.
|
|
|
Advanced Control Algorithms of Powertrain Units
Špičák, Milan ; Puškár, Michal (referee) ; Slimařík,, Dušan (referee) ; Kučera, Pavel (referee) ; Píštěk, Václav (advisor)
This thesis describes computational control of vehicle powertrains using common variable, engine torque. The thesis is divided into three main parts. The first one shows design of methods for torque estimation using known or measured variables on the vehicle. The second part contains design of powertrain control algorithm utilizing the engine torque as a common variable among individual modules. The third part describes experimental optimization of the longitudinal acceleration of a vehicle using torque control.
|
|
|
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.
|
|
|
Analysis of steel grade influence on small induction machine efficiency
Plíšek, Oldřich ; Klíma, Jiří (referee) ; Mach, Martin (advisor)
The theoretical part of the bechelors thesis examining the impact of the material of the magnetic circuit on the efficiency of induction motors is devoted to analysis of the induction motor and its losses. It also describes the measuring, including calculations of individual losses. Another theoretical part examines the impact of specific losses on the magnetization characteristics of assessed laminations. The practical part includes laboratory measurements of single phase and three phase motors ATAS Electromotory Náchod brand with multiple types of laminations. Measured values are used to calculate individual losses, which are later mutually compared. Models of measured motors with multiple types of laminations are simulated with the aid of ANSYS Maxwell RMxprt program. Analysis of engines with specific types of laminations are performed with the aid of analytical calculations. Results of calculations are compared with simulated and measured values.
|
|
|
Analysis of possibilities to improvement induction motors efficiency
Novotný, Jiří ; Hájek, Vítězslav (referee) ; Mach, Martin (advisor)
In the first part of the master’s thesis dealing with the increasing efficiency of induction motors there are briefly presented basic information about induction motors, followed by an overview of the losses of induction motors. The next part deals with the ways to increase efficiency of induction motors without increasing tooling costs. The practical part consists of four measurements of four induction motors, with their various mechanical adjustments to make comparing benefits of these modifications possible. The measured results are compared by a finite element method in Maxwell 2D Design program, in which the same motors are simulated as measured. Theoretical knowledge about the increase of efficiency is practically applied while being implemented in the simulations.
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