Evaluation of an Electric Vehicle Performance under Different Modes of Operations: Experimental Study

摘要

In recent years, Electric Vehicles (EVs) have become a production viable and effective mode of efficient transportation. Electric Vehicles (EVs) can provide increased fuel economy and reduced harmful emissions over convention technology vehicles. In this study, the electric vehicle (EV) was tested to check its performance using a certain procedures. The tests described in this study are "No Load Tests", "Load tests" and "Onroad Performance Evaluation Tests". All these tests allow evaluating the power and energy consumption by the electric vehicle during different modes of operations. The battery voltage and current were recorded during the different tests to allow plotting the requirements. The vehicle has been demonstrated to be very reliable and all the presented tests showed excellent results regarding system behavior and efficiency. Some of the performance characteristics of this Electric Vehicle are: maximum speed is nearly about 60 km/h at the top gear with 1.78 m/s2 acceleration. The vehicle can carry two passengers comfortably seated inside cabin. The DC traction motor was connected directly to the conventional mechanical transmission, which allows to give 15 HP at 3200 rpm, and 72 Volt input and that is more reliable and suitable for the tested vehicle. For the constructed electric vehicle, the available and suitable type of batteries is the US 8VGC XC deep cycle lead acid batteries for the 8 V 170 amp hours (AH). According to the calculations, we were able to fit eight batteries in our vehicle. This would give a battery pack of 10.88 kWhr. We have them configured in two rows of eight series connected batteries creating a battery pack of 64 V and 170 AH. All the instrumentation for the driver panel was implemented digitally, given information about battery current, battery voltage, and rpm of the motor.