This content is not included in your SAE MOBILUS subscription, or you are not logged in.
Influence of the Drive Control Strategy on the General Performance of a City Electric Vehicle
Published June 16, 1993 by Verlag Des Verein Deutscher Ingenieure GmbH in Germany
In this paper, the authors confront different field control strategies of a chopper fed direct current drive system in order to quantify the drive control influence on the general urban electric vehicle performance.
The general frame of the vehicle modelling is first presented. The system is divided into several blocks corresponding to the different parts of the vehicle, where such parameters as aerodynamic drag, pneumatic power losses, magnetic saturation in the motor or losses in the battery are used. The developed model permits to determine the power losses in the different parts of the system and to locate the most important sources of losses which have to be considered in the elaboration of the drive control strategy.
The authors then investigate two types of control strategies: the typical one currently used for the electric vehicle, and a more advanced control strategy which minimizes the power losses in the motor winding.
To evaluate the performance of both strategies, the steady state operation of the drive system is first simulated to represent the evolution of efficiency in the torque-speed graph. So a quantitative confirmation of the interest of the "optimized" strategy is obtained.
In the end, the control strategies are tested, considering the whole system dynamic operation, in order to determine the electric vehicle range for various usage models.