Diagnóstico, mantenimiento correctivo, puesta en operación y pruebas de funcionamiento del equipo Ward Leonard del Laboratorio de Máquinas Eléctricas de la Facultad de Ingeniería Eléctrica y Electrónica

Abstract

This technical study arises from the need of reincorporate to the laboratory of electrical machines, the electric energy supply with variable voltage and frequency signals. Every inspection, maintenance and control action has been detailed as clearly as possible and executed with all the relevant safety measures. The Ward Leonard set uses a three-phase induction motor as the primary source of a DC generator, which by the action of its independent excitation circuit, allows controlling the terminal voltage to be supplied to the DC motor, controlling its speed of rotation. In the other hand, the DC motor is the primary source of the synchronous generator, which means that its excitation circuit allows the adjustment of the voltage amplitude of the three-phase wave. The equipment, once the maintenance and put in operation tasks are finished, can supply electrical energy from 0 V at 0 Hz, going through 190 V at 60 Hz and maximum 300 V at 100 Hz, obtaining a control ratio of ΔV = +- 70V and Δf = +- 10 Hz in all operating points. These voltage and frequency signals can be independently adjusted to meet any need that may arise, such as: development of student and teaching practices, as well as scientific research processes focused on analyzing equipment responses to variable power supply conditions.