Plug-in Electric Vehicles (PEVs) have been attracting more interest thanks to their great potential to achieve higher fuel economy and efficiency. One of the major challenges for the development of PEVs is the power electronic system which has a great influence on the vehicle performances. In an effort of making the power electronic system more compact, lighter and cost efficient, this master thesis pro- poses the integration of an AC/DC converter and a DC/DC converter into a single multi-functional bidirectional converter. The proposed converter is able to achieve all functions of a vehicle i.e. plug-in charging, propulsion and regenerative brak- ing. The motivation for proposing a multi-functional converter and the definition of its concept are presented. A suitable topology that allows for operation as both AC/DC and DC/DC converter is selected. The multifunctional converter is designed to operate both as a 30 kW interleaved bidirectional DC/DC converter and as an 11 kW 3-phase AC/DC rectifier, with switching frequencies of 80 kHz and 240 kHz respectively. 90% component sharing is achieved between the different functions. Type III controllers are designed for DC/DC converter functions. A voltage ori- ented control is designed for the AC/DC rectifier function to achieve unity power factor. Simulation through Matlab/Simulink allowed to validate the converter and its controller design with respect to requirements.
|Datum Prijs||2 sep 2019|