Effects of the control-process-structure to the drivability in electric vehicles

A future-orientated strategy for the use of energy within passenger cars is electrical energy. Due to this development there is a need of considering the conditioning of electrical energy to be used for electrical machines under conditions of an electric vehicle. Comparing a fixed step-size control-system with a space-vector based hysteresis-control (bang-bang-control), the high frequent influence to the whole power train is evaluated. As electrical drives for electric vehicles need to have a wide speed range and likewise be robust the chosen control processes are applied to a permanent magnetic synchronous machine (PMSM). This offers the opportunity of a gearless drive which by the way offers a big advantage in comparison to combustion engines. To connect the energy source to the PMSM there is an inverter which builds up three-phases and likewise a rectifier in the opposed direction with a set of IGBTs and integrated antiparallel diodes. The command signal is set by a torque demand as known in a traditional car with the help of an acceleration pedal.