Study and development of an Electronic Power Converter for Electrical Vehicle based on General Time Multiplexing (GTM)

Traction control is crucial for hybrid cars, where electronics, integrated into the car via SoC(system-on-chip), have the role of regulating signals between fuel cell, motor, and battery interfaces in order to manage, for example, vehicle acceleration and deceleration. Signals in vehicles must be remodeled using DC/AC inverters or DC/DC converters and, in particular, this thesis focuses on the handling of DC/DC switch movements needed to manage the direction (i.e. acceleration or deceleration) and amount of current and voltage in a hybrid vehicle, through the use of PWM signals. PWM signals manage the opening or closing of the switches, which are non-instantaneous mechanical movements, so, to avoid problems of short circuits, a dead time must be inserted in the signals. The work done is about the development of different PWM generation, insertion of dead time and shifting techniques, through the use of the SoC Infineon Tricore with GTM, a generic timer platform from Bosch, indicated for the automotive field. The study explored different approaches for the creation of complementary PWM signals with dead time, with or without the use of the Dead Time Module (DTM) of GTM and some mathematical methods based on the observation of the architecture and the proposed goals. For the case of multiple cells of switches and phase-shift control, the shifting between signals has been realized through changes in counter values. The used methods are compared, in terms of speed, complexity and synchronization, focusing on strengths and weaknesses of each method, concluding that methods with the use of a timer are more precise than others and the use of DTM is preferably to be avoided because introduces a delay.