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In this thesis work at first transformer is choose and calculated it's parameters as in a three-phasefull-wave thyristor rectifier, it is necessary to use a transformer. Then different types of rectifiersdesigned in MATLAB/ SIMULINK. At first three phased six pulse fully controlled rectifierdesigned and evaluated in MATLAB/ SIMULINK and output data was collected. Rectifier controlsystem is designed to opening angel of thyristors. Then three phase twelve pulse controlled rectifierdesigned in MATLAB/ SIMULINK and evaluated the output data. After analysis these data it wasobserved that twelve pulse controlled rectifier is more suitable for this project. As designed model issmaller in size and useable in various purposes with various production model. Then in the secondpart H bridge inverter with twelve pulse controlled rectifier included RLC load was simulated inMATLAB/ SIMULINK. RLC load parameters collected from the simulation of induction heatingprocess which was simulated using COMSOL Multiphysics®. At present, modeling of physicalprocess which was simulated using COMSOL Multiphysics®. At present, modeling of physicalprocesses in most cases is based on the use of numerical simulation methods. In solving numericalsimulation problems, an appropriate software product is needed that can provide with a sufficientaccuracy and efficiency a wide range of possibilities for the fastest and most qualitative constructionof physical models. The simulation process is complicated. 15mm width of pipe wall with 1kHzfrequency was chosen for simulation in COMSOL Multiphysics®.
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