Computer simulation of “fuel cell - electric motor” system

The article presents results of the simulation research of “fuel cell - electric motor” system. The simulations were made for battery of alkaline fuel cells which feed a direct current disc motor with permanent magnet. An electric motor of this type is used to propel electric vehicles. The simulations were made on the basis of a voltage-current characteristics of a cell and a mathematical model of an electric motor. The cell characteristics was described by the use of a mathematical equation in the form of polynomial and the motor running by a differential equation of voltage and motion. The system was researched in a steady and unsteady state of operation. The course of voltage, current and motor rotary speed when set in motion was evaluated as well as the dependence of a motor's rotary speed and efficiency on load torque. The simulation of motor starting up was not only made for the case of idle running but also for running with an nominal load. The article describes the characteristics, advantages and disadvantages of the applied method of simulations.