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Three-phase inverter for high-speed induction motor
Pinďák, Michal ; Knobloch, Jan (referee) ; Procházka, Petr (advisor)
The goal of this master´s thesis is primarily the theoretical analysis of three-phase inverters and subsequent familiarization of the reader with their detailed practical structure. The first part is devoted to the general definition of the power semiconductor converter as such. The following part describes the principle of three-phase pulse width modulation including the widely used principle of scalar control of induction motors. The second half of the thesis is already focused on the practical design of a three-phase inverter for a 50 kW high-speed induction motor. This section explains the problem of sizing and selecting all of the sub-elements of the inverter based on the parameters specified by the end user of the device.
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Design and analysis of high-speed induction motor
Klusáček, Jiří ; Ondrůšek, Čestmír (referee) ; Vítek, Ondřej (advisor)
Classical series production induction motors are usually adequate to most of the industrial application by range of rpm. For application requiring higher speed is traditionally used gearbox which is between motor and driven equipment. Nowadays, where are settings demands on efficiency operations and the most easily maintainance, so aim is to join driven equipment narrow with motors. When operating motors over 3000 rpm there are some proper problems. Generally, there is higher losses due to supply voltage from frequency converters and mechanically strength of rotor. This thesis provides a view on existing solutions of high speed induction machines. In the text there are mentioned options of using laminated rotor and solid rotor. Due to regard to angular speed of rotor there are mentioned the most important equations and knowledge, which are related to a mechanical strength of used materials and dimensions of machines. Later on is there mentioned groundwork, which when we are respecting them, we may improve the efficiency of machine. In this thesis is mentioned design, analyses and manufacturing process of high speed induction motor with solid rotor and copper layer at the surface. After that there are simulation of electromagnetic field through the use of finite element method in program FEMM. In the last chapter there are presented measured data of manufactured high speed motor and they are compared with calculations.
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Thermal model of solid rotor high-speed induction motor with water cooling
Súkeník, Jakub ; Vítek, Ondřej (referee) ; Toman, Marek (advisor)
This paper deals with thermal calculations of high-speed induction machine with a solid rotor with a copper coating and water cooling. The first part presents the basic equations and mechanisms of heat transfer, and also describes the method of heat network. In~the~next section, thermal resistances for individual parts of the machine and water cooling are derived. The third part describes the distribution of nodes in the heat network of~the induction machine. The last part contains the results of the heat network for~the~high-speed induction machine with the solid rotor with the copper coating and water cooling. Functionality of the created heat network was verified using Ansys software.
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Thermal Analysis Of Solid Rotor Coated With Copper Layer
Súkeník, Jakub
This paper deals with thermal calculations of rotor of a high-speed machine. The first part describesthermal network and the basic relationships for the calculation of thermal resistances. In the secondpart, the rotor thermal network for a high speed machine is designed. Next, this thermal networkof the rotor is compared with the thermal model of a rotor created in Ansys software.
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Thermal model of solid rotor high-speed induction motor with water cooling
Súkeník, Jakub ; Vítek, Ondřej (referee) ; Toman, Marek (advisor)
This paper deals with thermal calculations of high-speed induction machine with a solid rotor with a copper coating and water cooling. The first part presents the basic equations and mechanisms of heat transfer, and also describes the method of heat network. In~the~next section, thermal resistances for individual parts of the machine and water cooling are derived. The third part describes the distribution of nodes in the heat network of~the induction machine. The last part contains the results of the heat network for~the~high-speed induction machine with the solid rotor with the copper coating and water cooling. Functionality of the created heat network was verified using Ansys software.
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Three-Phase Inverter For High-Speed Induction
Motor
Pinďák, Michal
The aim of this project is to design a three-phase inverter for high speed induction motor. Nowadays, inverters are one of the most used devices for the torque and the rotational speed regulation of synchronous or induction motors. The main principle of these devices is frequency and voltage amplitude change by PWM modulation on the output. By this simple principle, we could keep a really good energy efficiency about 95 %. The article shows all basic structural parts of device, their parameters and the purpose of their use.
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Three-phase inverter for high-speed induction motor
Pinďák, Michal ; Knobloch, Jan (referee) ; Procházka, Petr (advisor)
The goal of this master´s thesis is primarily the theoretical analysis of three-phase inverters and subsequent familiarization of the reader with their detailed practical structure. The first part is devoted to the general definition of the power semiconductor converter as such. The following part describes the principle of three-phase pulse width modulation including the widely used principle of scalar control of induction motors. The second half of the thesis is already focused on the practical design of a three-phase inverter for a 50 kW high-speed induction motor. This section explains the problem of sizing and selecting all of the sub-elements of the inverter based on the parameters specified by the end user of the device.
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Analysis of High Speed Squirrel Cage Induction Motor With Influence of Riveting
Klíma, J.
This paper deals with analyzing of high speed squirrel cage induction motor and the influence of riveting stator stack. The model of high speed induction motor was made in ANSYS Maxwell software in accordance with provided design documentation. Test bench was used to experimentally verify the results. The difference between measurement and simulation are explored. Distribution of the losses and its individual portion are discussed at the end. Stator sheets are riveted and influence of rivets will be subject of the interest.
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Design and analysis of high-speed induction motor
Klusáček, Jiří ; Ondrůšek, Čestmír (referee) ; Vítek, Ondřej (advisor)
Classical series production induction motors are usually adequate to most of the industrial application by range of rpm. For application requiring higher speed is traditionally used gearbox which is between motor and driven equipment. Nowadays, where are settings demands on efficiency operations and the most easily maintainance, so aim is to join driven equipment narrow with motors. When operating motors over 3000 rpm there are some proper problems. Generally, there is higher losses due to supply voltage from frequency converters and mechanically strength of rotor. This thesis provides a view on existing solutions of high speed induction machines. In the text there are mentioned options of using laminated rotor and solid rotor. Due to regard to angular speed of rotor there are mentioned the most important equations and knowledge, which are related to a mechanical strength of used materials and dimensions of machines. Later on is there mentioned groundwork, which when we are respecting them, we may improve the efficiency of machine. In this thesis is mentioned design, analyses and manufacturing process of high speed induction motor with solid rotor and copper layer at the surface. After that there are simulation of electromagnetic field through the use of finite element method in program FEMM. In the last chapter there are presented measured data of manufactured high speed motor and they are compared with calculations.
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