Analysis of operating modes of a traction electric drive

Abstract

Nowadays the modern society thinks more about the adverse impact of transport on the environment. Therefore development engineers and manufacturers of automobile and bus facilities have recently started to take more interest in creation of transport facilities with a reduced impact on the environment. These transport facilities comprise an energy storage unit as a traction battery that has a key impact on their cost and characteristics, such as like a carrying capacity and a distance on one charge. Development engineers must get all the necessary technical specifications of system components, as well as rapidly and flexibly evaluate an impact of their changes on service characteristics. It allows applying a simulation approach by using the Matlab/Simulink software suite while analysing motion modes under service conditions. This article contains the results of such an analysis for motion modes of passenger vehicles with high capacity depending on their routes. This analysis was executed by recording speed rates with subsequent statistical processing. It shows that average running speeds don’t exceed 15 km/h. And the vehicle doesn’t reach any maximum speed values. It has been established that the electric engine working points relate to the first zone of the external characteristic. The most typical speed values do not exceed 1/3 from the maximum speed, and the values of a torsion tractive effort torque and a brake torque are within the limits and do not exceed 35 from the maximum short-time torque.