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This work presents the study of an electric motor, which was used to drive a small electric car. The aim was to select a motor with characteristics of suited operation to drive the electric car at a speed range from 12 to 20 km/h. Tests were carried out on the electric car with the purpose of determining its dynamic behavior. The test results allowed to select a DC (Direct Current) brushless electric motor of 12 V and 5.9 A with 77% of maximum efficiency. A theoretical study was developed to determine the best relation of the movement transmission from the motor to the car. By doing that, it was possible to determine the characteristics of the operation of the motor in which it developed its maximum efficiency, when the electric car was started up. The speed ratio value resulted in 64:1. The study showed that to operate a 20 km/h speed, the car requires a mechanical power of 58 W from its electric motor.

Estudo de um motor CC brushless aplicado no acionamento de um carro elétrico de pequeno porte