Desenvolvimento de sistema de supervisão e controle para inversor de frequência e conjunto motobomba do laboratório de fluídos e hidráulica da UFSM

Abstract

The Laboratory of Fluid Mechanics and Hydraulics is used by students, teachers and researchers for the development of experimental teaching, research and extension activities. Among the equipment used, there is a free flow channel, used for hydraulic tests and tests, one of the largest of its kind in the country, consisting of a pumping system, spillways, valves and various reservoirs that can be operated in different configurations for conducting experiments. However, the lack of technological equipment for precise and centralized control of experiments in the hydraulic channel means that the laboratory is not used to its maximum capacity. So, the development of this project has as its main motivation to use the knowledge of the automation area to provide the laboratory with an automated environment for the control of the equipment, enabling various experimental activities. Therefore, the work is to develop a supervision and control system that will communicate with a frequency inverter, model CFW700 from WEG manufacturer, which is responsible for the drive and control of a 50 cv three-phase induction motor which, in turn, controls system input flows through a pump. The communication uses the Modbus RTU protocol, the RS485 standard for the physical medium and the control is proportional, integral and derivative (PID). The objective of this project is to provide a platform that teachers and servers are easy to use that, at a safe and convenient distance, controls the water supply in the channel, setting levels, flow velocity, parameterizing acceleration and deceleration ramps, and also It is a scalable design, so that in the future it will become a single channel control structure, concatenating with other automation projects, especially instrumentation.