Levantamento de curvas características do motor de corrente contínua de ímã permanente e escovas

Abstract

Electric machines are devices that convert energy. They are called electric generators when they receive rotational mechanical energy at the shaft, and motors when they receive electrical energy at the machine terminals. This study presents an investigation to map the operational curve of a permanent magnet DC motor, aiming to obtain load profiles that provide maximum efficiency. During the analysis, it was found that the motor under study can achieve a maximum efficiency of 61%. To achieve this result, it consumes an input power of 47 W and delivers an output power of 28 W, generating a torque of 0,15 N.m. Additionally, it was observed that the motor performs better with light loads, with rotations up to 1819 rpm. These findings confirm the suitability of the motor for applications requiring low torque, low power, and reduced speed.