Análise de ciclos de operação de motores de indução trifásicos no EMTP - ATP

Abstract

This Course Completion Paper (TCC) uses the EMTP-ATP (ElectroMagnetic Transients Program) and the ATPDraw to analyze operating cycles (or duty regimes) of three-phase induction motors. The work regimes represent the power requested by the electric machine on its axis as a function of time, respecting thermal limits. The operating cycles are standardized by ABNT NBR 17094-1:2018 and are essential to correctly specify electric motors in relation to the mechanical requirements that must be activated, which can be continuous or intermittent loads, for example. Initially, it was necessary to model three-phase induction motors in EMTP-ATP and ATPDraw from manufacturers' data. Then, the analogy between mechanical and electrical systems was used to represent the charge torque, as well as the moment of inertia and friction

coefficient characteristic of the problem. Through adjustments in this electrical- mechanical equivalent, it was possible to model the work regimes S1 (continuous), S2

(limited time) and S3 (intermittent periodic). The procedures adopted are described in

detail and enable advanced investigations of three-phase induction motors in EMTP- ATP and ATPDraw.