The Design and Realization of a three-level Vienna rectifier control represents a Vienna rectifier circuit with a demonstration of a theoretical and experimental control implementation required for operating such a circuit. The Vienna rectifier generates a DC voltage out of the three-phase AC voltage and is often presented in higher power applications such as Uninterruptible Power Supply (UPS), Electric Vehicle Charging Stations (EVCS) as well as telecommunication and other similar power supplies. The primary question of the presented research can be interpreted as follows: Is a two-level SiC solution competitive compared to a three-level hybrid Si/SiC solution in terms of efficiency? To answer this, a new test platform that assures rectifier tests of semiconductors in T-Type topology (Vienna rectifier) had to be developed. During the research, a new test unit was developed with a complete control and measuring system. This provided the possibility of testing semiconductors under rectifier conditions (an application which enables conversion from AC to DC).
The first part of this thesis presents theoretical knowledge about rectifier topologies used during the research in addition to providing the reader with the ability to understand the written work. Theory includes a theoretical knowledge of a boost PFC converter, active six switch boost-type PFC rectifier (two-level B6 converter) and a three-level Vienna rectifier. In the theoretical part, control techniques used for accomplishing precise results are also presented. The core of this study demonstrates modelling (simulations), description of practical work (PCB design, sensors selection, programming) and continues with an experimental study on existing boards for two and three-level topologies. The experimental results in Chapter Tests and Results present the benefit of using more advanced (E.g. SiC) semiconductors in a three-Level (Vienna rectifier) converter and compares them with a two-level (B6) converter.
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