Diseño e implementación de un módulo didáctico para el control en cuatro cuadrantes de una máquina DC

Abstract

This work presents the design and implementation of ¾ HP DC machine drive for didactic purposes. The module has 5 electronic boards designed using bibliographic recommendations in order to ensure its operation in power electronics and reduce EMIs. The boards allow for the connection of the DC motor, tachogenerator, braking resistor, capacitors for the DC bus, alternating power and provide the ease of connecting measuring instruments. For the design of the controllers, the electrical and mechanical parameters of interest of the DC machine were determined through testing. The control implemented is a cascade control that was previously simulated using Simulink. The controlled variables of the DC machine are armature current and angular speed. A PI controller was implemented in each loop of the cascade controller. Current controller and the speed controller were tuned for optimum magnitude and symmetric optimum, respectively. The latter considers an Anti-windup action. As for the control for the H bridge, a bipolar control modulation was employed. To visualize the main variables of interest, as well as the transmission of references, an HMI was designed following the recommendations of the ISA 101 standard.