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Vysokotlakový díl parní turbiny
Martinek, Miroslav ; Ing.Richard Fichtl (oponent) ; Fiedler, Jan (vedoucí práce)
Cílem práce je vypracovat bilanční srovnání zapojení variant s vysokootáčkovým a plnootáčkovým VT dílem parní turbíny a pro zvolenou vhodnější variantu vypracovat další optimalizaci. Optimalizace začíná průtočnou částí, pokračuje volbou profilu a konstrukčními výpočty. Pro nakreslení závěrečného podélného řezu VT dílem je provedena kontrola rotoru a základní výpočty potrubí.
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Fault-Tolerant Control of a Flux-switching Permanent Magnet Synchronous Machine
Aboelhassan, Mustafa Osman Elrayah ; Singule, Vladislav (oponent) ; Skala, Bohumil (oponent) ; Skalický, Jiří (vedoucí práce)
It has become clear that the most successful design approach involves a multiple phase drive in which each phase may be regarded as a single-module. The operation of any one module must have minimal impact upon the others, so that in the event of that module failing the others can continue to operate unaffected. The modular approach requires that there should be minimal electrical, magnetic and thermal interaction between phases of the drive. Flux-Switching permanent magnet synchronous machines (FS-PMSM) have recently emerged as an attractive machine type virtue of their high torque densities, simple and robust rotor structure and the fact that permanent magnets and coils are both located on the stator. Flux-switching permanent magnet (FS-PMSM) synchronous machines are a relatively new topology of stator PM brushless machine. They exhibit attractive merits including the large torque capability and high torque (power) density, essentially sinusoidal back-EMF waveforms, as well as having a compact and robust structure due to both the location of magnets and armature windings in the stator instead of the rotor as those in the conventional rotor-PM machines. The comparative results between a FS-PMSM and a traditional surface-mounted PM (SPM) motor having the same specifications reveal that FS-PMSM exhibits larger air-gap flux density, higher torque per copper loss, but also a higher torque ripple due to cogging -torque. However, for solely permanent magnets excited machines, it is a traditional contradiction between the requests of high torque capability under the base-speed (constant torque region) and wide speed operation above the base speed (constant power region) especially for hybrid vehicle applications. A novel fault-tolerant FS-PMSM drive topology is presented, which is able to operate during open- and short-circuit winding and converter faults. The scheme is based on a dual winding motor supplied from two separate vector-controlled voltage-sourced inverter drives. The windings are arranged in a way so as to form two independent and isolated sets. Simulation and experimental work will detail the driver’s performance during both healthy- and faulty- scenarios including short-circuit faults and will show the drive robustness to operate in these conditions. The work has been published in ten conference papers, two journal papers and a book chapter, presenting both the topology of the drive and the applied control schemes, as well as analysing the fault-tolerant capabilities of the drive.
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Zpracování dat z měření tlumičů na tlumičovém dynamometru
Vaněk, Vojtěch ; Vančura, Jan (oponent) ; Blaťák, Ondřej (vedoucí práce)
V první části se bakalářská práce zabývá problematikou tlumiče po teoretické stránce. V úvodu se zabývá přehledem používaných tlumičů, dále pak charakteristickými veličinami tlumičů, způsoby testování, a nakonec různými negativními ději a vlivy při chodu tlumiče. V druhé části se bakalářská práce zabývá analýzou konkrétního tlumiče, který byl testovaný na tlumičovém dynamometru MTS EMA-234 2K v dílně ÚADI. Pokusíme se popsat chování měřeného tlumiče, popřípadě předvídat vady tlumiče díky poznatků z teorie popsané v první části.
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Zpracování dat z měření tlumičů na tlumičovém dynamometru
Vaněk, Vojtěch ; Vančura, Jan (oponent) ; Blaťák, Ondřej (vedoucí práce)
V první části se bakalářská práce zabývá problematikou tlumiče po teoretické stránce. V úvodu se zabývá přehledem používaných tlumičů, dále pak charakteristickými veličinami tlumičů, způsoby testování, a nakonec různými negativními ději a vlivy při chodu tlumiče. V druhé části se bakalářská práce zabývá analýzou konkrétního tlumiče, který byl testovaný na tlumičovém dynamometru MTS EMA-234 2K v dílně ÚADI. Pokusíme se popsat chování měřeného tlumiče, popřípadě předvídat vady tlumiče díky poznatků z teorie popsané v první části.
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Fault-Tolerant Control of a Flux-switching Permanent Magnet Synchronous Machine
Aboelhassan, Mustafa Osman Elrayah ; Singule, Vladislav (oponent) ; Skala, Bohumil (oponent) ; Skalický, Jiří (vedoucí práce)
It has become clear that the most successful design approach involves a multiple phase drive in which each phase may be regarded as a single-module. The operation of any one module must have minimal impact upon the others, so that in the event of that module failing the others can continue to operate unaffected. The modular approach requires that there should be minimal electrical, magnetic and thermal interaction between phases of the drive. Flux-Switching permanent magnet synchronous machines (FS-PMSM) have recently emerged as an attractive machine type virtue of their high torque densities, simple and robust rotor structure and the fact that permanent magnets and coils are both located on the stator. Flux-switching permanent magnet (FS-PMSM) synchronous machines are a relatively new topology of stator PM brushless machine. They exhibit attractive merits including the large torque capability and high torque (power) density, essentially sinusoidal back-EMF waveforms, as well as having a compact and robust structure due to both the location of magnets and armature windings in the stator instead of the rotor as those in the conventional rotor-PM machines. The comparative results between a FS-PMSM and a traditional surface-mounted PM (SPM) motor having the same specifications reveal that FS-PMSM exhibits larger air-gap flux density, higher torque per copper loss, but also a higher torque ripple due to cogging -torque. However, for solely permanent magnets excited machines, it is a traditional contradiction between the requests of high torque capability under the base-speed (constant torque region) and wide speed operation above the base speed (constant power region) especially for hybrid vehicle applications. A novel fault-tolerant FS-PMSM drive topology is presented, which is able to operate during open- and short-circuit winding and converter faults. The scheme is based on a dual winding motor supplied from two separate vector-controlled voltage-sourced inverter drives. The windings are arranged in a way so as to form two independent and isolated sets. Simulation and experimental work will detail the driver’s performance during both healthy- and faulty- scenarios including short-circuit faults and will show the drive robustness to operate in these conditions. The work has been published in ten conference papers, two journal papers and a book chapter, presenting both the topology of the drive and the applied control schemes, as well as analysing the fault-tolerant capabilities of the drive.
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Vysokotlakový díl parní turbiny
Martinek, Miroslav ; Ing.Richard Fichtl (oponent) ; Fiedler, Jan (vedoucí práce)
Cílem práce je vypracovat bilanční srovnání zapojení variant s vysokootáčkovým a plnootáčkovým VT dílem parní turbíny a pro zvolenou vhodnější variantu vypracovat další optimalizaci. Optimalizace začíná průtočnou částí, pokračuje volbou profilu a konstrukčními výpočty. Pro nakreslení závěrečného podélného řezu VT dílem je provedena kontrola rotoru a základní výpočty potrubí.
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