Abstract

This work aims to represent acceleration/deceleration ramps generator and a voltage/frequency control through a SCICOS block diagram for evaluation of values commonly used with electric vehicles. It was opted for the representation of functional block diagrams for implementing the models, and was adopted the free software SCILAB/SCICOS to design and to simulate the representations proposed. Also measurements from electric vehicle coupled to frequency inverter were done and compared to values obtained with simulations. The diagrams for the functions of acceleration/deceleration ramps and of V/f control was implemented, being fundamentals characteristics to simulate the operation of a frequency inverter for driving induction motors. Although the analysis was limited to these characteristics, in view of a variety of functions available on the inverter, the models were presented satisfactory to the representation of the basic characteristics of an inverter in the scalar configuration.

Key words: Acceleration/deceleration ramps, electric vehicle type mini-baja, voltage/frequency control.