Design and control of a high-dynamic DC-DC converter to supply a DC-link for a traction drive

The "green" transition that is taking place in these years is strictly tied with the electrical transition. The electrical transition aims to a society powered by more efficient electrical machines and electrical systems in order to decrease greenhouse emissions and pollution. The changes needed are being made possible by recent developments in Power Conversion Systems (PCS). From Renewable Energy Sources (RES) to Electric Vehicle (EV) applications and Energy Storage Systems (ESS), PCSs play a key role in these Ąelds. Many electrical applications nowadays require an ESS, as in EV applications where the ESS is usually composed by one or more battery packs. This is also the case for test bench applications for electrical machines. However, building a battery pack can be expensive and the charging system complex. Because of these issues, PCSs emulating the behaviour of a battery pack can be implemented in test bench applications in order to reduce the cost of the system and to avoid the complexity of implementing the charging system. The main goal of this thesis work is to design a DC/DC converter with high dynamic for a test bench application in order to emulate the behaviour of a battery pack supplying power to a CHB inverter controlling a 9-phase electrical machine. In this work the design procedure for the converter along its components is discussed. An evaluation of the converter efficiency will be presented demonstrating the high efficiency of the proposed converter (η > 90%). The design of a PI controller for the system is presented. Finally, different possible models of the considered system implemented in SIMULINK are presented and discussed along with the implementation of a simpliĄed battery emulator algorithm, demonstrating the ideal integration of the converter in the intended system with the intended functionalities.