Baratieri, Cássio LucianoSantin, Mateus2022-02-012022-02-012020http://repositorio.uricer.edu.br/handle/35974/378The present work deals with the development of a methodology for comparative analysis of the energy efficiency of the systems used in the activation of Three-Phase Induction Motors (MIT), covering its main characteristics of operation and applicability, together with its advantages and disadvantages. A literature review was conducted to allow a qualitative analysis of the energy efficiency of these starters. Concomitant to this qualitative analysis, a comparative methodology has been developed that aims to validate in computer simulation and, in an experimental test bench, with the purpose of quantitatively evaluating the energy efficiency of the drive systems applied to engines. This quantitative efficiency comparison is developed by comparing the active power of the direct start switch with the active power of the other implemented switching keys, during the transient period of the motor activation. This comparative methodology is a very important tool for the evaluation and validation of the study. In parallel with the comparative efficiency methodology of the starter keys, a financial analysis was prepared to elucidate the necessary investment and textit payback to stipulate the return time in case of replacement of the technology applied to the drive. Finally, the results indicate the best energy efficiency presented by the frequency inverter to the detriment of the other starting keys, within the scenario used by the comparative methodology. The inverter is more efficient because it can operate with controllable acceleration ramps, which directly interfere with the performance and efficiency of the entire drive system of a three-phase induction motor. The other starters are less efficient due to the load profile coupled to the axle (constant load), where when driving a load with this profile and with a value close to the nominal, it makes implementation less efficient or even impractical.pt-BREngenharia ElétricaSistemas de acionamentosEficiência energéticaSimulação computacionalTrabalho de Conclusão de Curso