Nowadays the equipment’s energy efficiency is more and more important. Electric motors account for approximately 57 percent of all electrical consumption worldwide. Although variable speed drives use only one-eighth of the energy of equivalent constant speed drives at light load, they only make up 5 percent of the industrial motors deployed today. This 5 percent conserves energy produced by 10 power plants and prevents 68 million tons of greenhouse gases from being emitted every year. So there is a growing need for economical energy consumption and decreasing costs as a result of power electronics.
The subject of this thesis is a model of a high-power (6MW) motor’s medium voltage inverter.
In the first part I present and compare various published solution of multi-level inverters, their advantages and disadvantages.
The next section describes one of the H-bridges controlled by a TMS320F28027 Piccolo processor, and the processor’s special communication algorithm with the FPGA. Then it follows the designed software components of the Piccolo and the FPGA.
In this thesis a protection circuit for a H-bridge is discussed as a solution against a sudden overvoltage or a switch failure. The calculations and the simulation are included, and the measurements of the built circuit are shown.