Controle de velocidade de um motor de corrente contínua excitação independente

Abstract

This work deals with the operation and speed control methods used in direct current motors. Its main objective is the development of a closed-loop speed controller for small DC motors, in the range of 200 to 1000 RPM. For that, presented the steps and difficulties encountered during the circuit and software development process. In this work, differentiated information is also developed about the development of the circuits used in the control and monitoring of the motor; motor speed acquisition circuit using optical encoder; graphical interface software, used for user interaction with the device, in real time. Finally, the modeled system and the approach used are presented. The results of the model simulations are compared to the practical results collected from the prototype. It is important to point out that in addition to the results obtained from practical experimentation and simulations, this work developed an important multidisciplinary tool that can contribute to practical classes on DC machine drives, speed control applied to DC machines and the relationship with power converters reflected in Power Electronics.