Testing Performances of a Special AC Induction Motor Used in Electric Car

IN this practical research a laboratory testing desk was build with fully functional system including 3-Phase Induction Motor, AC Controller and Battery Bank with charger, enabling the practically verification of performances and behaviour of the complete electric drive system containing the exact parts that would be proposed to use in converting a diesel or petrol powered vehicle to an electric car. The tests were carried on a 3-Phase IM with special design and construction suitable to be used in electric car. The resistive loads of the car were simulated using a synchronous generator with a variable electric resistive load coupled to 3-Phase IM. An electronic car foot pedal and a battery bank were used as main source of power with a capacity suitable for the size of a light weight or medium size car.The performances of 3-Phase IM were tested in several practical cases simulating the running of 3-Phase IM on no load, running of 3-Phase IM to accelerate the car from stop position to reach a certain speed fixed by driver, for different resistive loads of the car. Running of 3-Phase IM to accelerate the car from stop position to reach a certain speed fixed by driver, keeping this speed for a certain period of time and decelerate, with different resistive loads of the car. Variations of rotation speed in time and variation of active torque in time of 3-Phase IM were studied for these cases, when different resistive load coupled to 3-Phase IM. Some conclusions and remarks about practical performances and behaviour of IM were given.