Design and development of power system for ursm electric vehicle John Christian A. Cervantes... [et. al]

Thesis (Bachelor of Science in Electrical Engineering) -- University of Rizal System-Morong.

EXECUTIVE SUMMARY: This thesis is a research project which the engineering design-approach tackled on developing power system for the URSM electric vehicle. Engineering principles were used in computing the speed, output power charging time and torque of the vehicle. This research aimed to design and develop a power system and DC motor for the university electric vehicle (EV) based on specification. Test the performance of the constructed power system for URSM electric vehicle in terms of the following: Terrain levels, load distribution and charging time. It also aims to determine the cost of energy consumption of the electric vehicle using the developed power system for URSM electric vehicle. Timer and tape measure were used to measure the distance and slope performance. Digital test instrument was used to determine the ratings and levels of voltage, power, and instrument was used to determine the ratings and levels of voltage, power, and current on different conditions. It also has a rechargeable battery. The DC motor controller will regulate the mechanical output that will be produced by the DC Motor. The Power System of Electric Vehicle was designed from user requirements. Based on the gathered data, the specifications were drawn and ratings for power supply were found by 350W, 48 Volts, 12 Ah and were constructed based on the design specifications. The energy consumption was determined and computed the cost with a total of 4.314/50km =0.086 Php. Per km when the battery is fully charged. The performance was tested by the following: (a) Power requirement for going uphill, In this analysis it was found put that when an approximately 123-kg weight of load is used including cyclist and an electric-bicycle, 157 watts is required to go up a reasonable gradient (slope) of 4% at 10km.h. (b) Investigation on Power requirement when it is smooth asphalt road, as Physics rule, a heavier rider has effective area A which increases the power needed to overcome the air drag. A total load of 138 kg can take 150 watts of power. (c) Motor torque behavior and power of electric-bicycle with a gradient of 4% at maximum power of 350 watts at 13 km/hr. speed, the torque is equal to 15 N-m. the amount of power that needs to climb uphill is so high that it requires high powered motor to do it efficiently, but that is the restriction, therefore with the limited power motor, the researcher can see that the efficiency declines very sharply when there comes the uphill. The researcher can conclude that an E-vehicle can: (a) be designed based on specifications. (b) be constructed through the guidance of an expert and can be done by allocated budget. (c) be tested using a treadmill to determine the performance in terms of terrain levels, load distribution, and it's charging time. (c) compute the energy it consumes when the battery is fully charged and its cost per km. the construction of E-Vehicle is a kind of product development and Engineering Design. The project followed the Engineering Design Principles along with the total Design Model. Based on the result of the study, the researchers came up with the following recommendations: (a) performance of a battery when e-vehicle goes downhill the battery can be charged when it is going downhill of e-vehicle supports regenerative braking (b) improve its batteries maximum capacity while considering its charging time. (c) safety purposes install a tail light, rear signal lights and side mirrors. (d) further studies should be undertaken on the design and functionality of the system.