Testing the Performances of DC Series Motor Used in Electric Car

By using a laboratory test desk built specially to test DC Series Motor and 3-phase IM, several practical tests could be performed. This desk include the electric motor, an electronic controller and Battery Bank with a charger, enabling the practically verification of performance and behaviour of the complete electric drive system, which contains the exact parts that would be proposed to use in converting a diesel- or petrol-powered vehicle to an electric car. The resistive loads of the car were simulated using a synchronous generator with a variable electric resistive load driven by the tested motor. The tests were carried on DC Series Motor with special design and construction suitable to be used in an electric car. An electronic car foot pedal and a battery bank were used as a main source of power with a capacity suitable to a light- or medium-weight car. The Variations of DC Series Motor rotating speed and active torque over the time were studied for these cases, when various resistive loads coupled to DC Series Motor. Some conclusions and remarks on the practical performance and behaviour of IM used in the electric car were concluded.