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Coupled modeling of induction motor using finite element method
Gregor, Tomáš ; Huzlík, Rostislav (referee) ; Vlach, Radek (advisor)
This thesis describes complex modeling of asynchronous motor by finite element method. Complex modeling concerns to making models based on different physical principles and their connection. Models are made in Ansys program components and their connection is made in program Ansys Workbench. This thesis includes creating electromagnetic model, thermal model, mechanical model and coupled model which connect partial models.
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Constrained modeling of induction motor using physical modeling
Toman, Marek ; Huzlík, Rostislav (referee) ; Vlach, Radek (advisor)
This paper deals with interaction of different physical phenomena in asynchronous motor. The first part of this work is devoted to computing of electrical ratios in asynchronous motor. By using the equivalent circuit in the shape of Gamma-circuit the equation for computing of currents, performances and losses of asynchronous motor are derived. The second part describes calculating of electromagnetic circuit and iron-core losses. In the next part there is the first part of associated model created which respects electric and electromagnetic ratios in the asynchronous motor. This model can be used for example to pursuance of variation of flux density caused by resizing load. In this model the unconventional way of computing the magnetizating inductance and resistance coresponding to iron-core losses is used. The next part deals with calculation of machine warming using the thermal network. In the last part there is a complete coupled model assembed which respects the interaction of electrical, electromagnetical and thermal ratios of induction machine.
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Coupled model of solenoid
Hejl, Karel ; Huzlík, Rostislav (referee) ; Vlach, Radek (advisor)
This work deals with the coupled model of an electromagnet and the verification of its results on a real electromagnet. The first chapter of this thesis is an introduction to the issues addressed in this work. The second chapter is devoted to physical analogies between domains and the description of an electromagnet. Also described are mathematical equations for electromagnet from electric, magnetic, mechanical and thermal viewing, as well as descriptions of modelling approaches using Matlab, Simulink and Simscape. The third chapter describes the design of an electromagnet to verify the coupled model. Another section is devoted to compiling equations for this proposed electromagnet and making of models. The penultimate part is dedicated to electromagnet design, measurement and data processing. The last section is devoted to comparing data with simulation and appreciation.
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Calculation of Optimum Magnetic Flux of Induction Motor to Minimize Losses with Consideration of Temperature Influences
Toman, Marek ; Peroutka,, Zdeněk (referee) ; Rafajdus,, Pavol (referee) ; Vorel, Pavel (advisor)
This thesis deals with a calculation of optimum stator flux linkage of an induction motor in order to minimize losses at an arbitrarily chosen operating point over a wide range of speed and torque. An accurate identification of the parameters of the equivalent circuit is carried out in this work. The parameters of the equivalent circuit are considered to be not constant but dependent on the selected quantities. A thermal model of the machine is also created in the thesis which makes it possible to find out correct values of the stator winding resistance and rotor cage resistance in all calculations. A coupled model of the induction motor is subsequently developed using the improved equivalent circuit and the thermal model. This is a very accurate model of the machine that takes into account the interaction of electromagnetic and thermal processes in the machine. The coupled model forms then the basis of an algorithm for finding the optimum values of flux linkage. The values of the calculated optimal flux linkages are experimentally verified and a very good agreement between the theoretical calculations and experimental measurements is achieved.
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Coupled modeling of induction motor using finite element method
Gregor, Tomáš ; Huzlík, Rostislav (referee) ; Vlach, Radek (advisor)
This thesis describes complex modeling of asynchronous motor by finite element method. Complex modeling concerns to making models based on different physical principles and their connection. Models are made in Ansys program components and their connection is made in program Ansys Workbench. This thesis includes creating electromagnetic model, thermal model, mechanical model and coupled model which connect partial models.
|
|
|
Constrained modeling of induction motor using physical modeling
Toman, Marek ; Huzlík, Rostislav (referee) ; Vlach, Radek (advisor)
This paper deals with interaction of different physical phenomena in asynchronous motor. The first part of this work is devoted to computing of electrical ratios in asynchronous motor. By using the equivalent circuit in the shape of Gamma-circuit the equation for computing of currents, performances and losses of asynchronous motor are derived. The second part describes calculating of electromagnetic circuit and iron-core losses. In the next part there is the first part of associated model created which respects electric and electromagnetic ratios in the asynchronous motor. This model can be used for example to pursuance of variation of flux density caused by resizing load. In this model the unconventional way of computing the magnetizating inductance and resistance coresponding to iron-core losses is used. The next part deals with calculation of machine warming using the thermal network. In the last part there is a complete coupled model assembed which respects the interaction of electrical, electromagnetical and thermal ratios of induction machine.
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