Modeling and Simulation of Series DC Motors in Electric Car

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The objective of this paper is assessing use of series DC motor in electric car with its rotation speed controller, and
evaluating its performances when different running cases of electric car with different loads.
The mathematical equations model of series DC motor and electronic inverter in dynamic state with reference frame
d – q were considered.
Computer model of these equations was implemented using MATLAB/SIMPOWER facilities obtaining a complete
model for motor and controller. Series DC motor is considered and its parameters were used for simulation. The
electronic controller operates based on PWM control technique.
Simulation of series DC motor performances was conducted within presumptions of changing car load and different
resistant torques.
Changing loads was realised changing number of passengers when electric car is running on normal streets, when
running on streets with slope, when car is accelerate to reach a stead speed and when car is changing speed rigidly
and suddenly running on country road having some holes and small slopes.
Some conclusions and remarks about performances and behaviour of series DC motor were concluded. The
simulated series DC motor was tested and mounted experimentally in a small truck car in Faculty of Mechanical &
Electrical Engineering at Damascus University.