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Three-phase induction machine fed by frequency inverter
Fiala, Zbyněk ; Huzlík, Rostislav (referee) ; Vítek, Ondřej (advisor)
The thesis analyses losses in the three phase induction motor with a focus on iron losses. In the first instance the three phase induction motor and the losses in it are described. The analytical calculation and the simulations in the RMXprt software are performed. The measurements were made with a different frequency (40, 50, 60Hz) and behaviour of supply voltage on a motor TM90-2S by EMP Slavkov. In conclusion the results of calculation, simulation and measurements are compared.
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Three-phase induction machine fed by frequency inverter
Fiala, Zbyněk ; Huzlík, Rostislav (referee) ; Vítek, Ondřej (advisor)
The thesis analyses losses in the three phase induction motor with a focus on iron losses. In the first instance the three phase induction motor and the losses in it are described. The analytical calculation and the simulations in the RMXprt software are performed. The measurements were made with a different frequency (40, 50, 60Hz) and behaviour of supply voltage on a motor TM90-2S by EMP Slavkov. In conclusion the results of calculation, simulation and measurements are compared.
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Tuned semiconductor laser for the diagnostic of the channel waveguides
Ondráček, František ; Skalský, Miroslav ; Čtyroký, Jiří
In contribution is described new measuring set up with tuned semiconductor laser and there are given first results of spectral losses and group refractive index in various channel waveguides by using a resonator method. The waveguides were prepared in special glasses by ion exchanges method and in LiNbO.sub.3./sub. crystal by proton exchange and also by titan difusion. Experimental results have demonstrated accuracy and rate of this arangement. In conclusion we have shown the possibility of the next research.
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