PROJETO DE UM MÓDULO DIDÁTICO DE UM FREIO ELETROMAGNÉTICO PARA ENSAIOS DE MOTORES ELÉTRICOS

Abstract

The efficiency of the electric motor is dependent on the load driven its axis as well as the techniques of control and drive, making it essential to know the behavior of power consumption, power factor and the torque/current ratio. The torque is determined by reaction forces on rotating and stationary parts. In order to obtain such quantities, without expensive equipment, such as dynamometers, generators and dedicated interfaces for measuring torque, one electromechanical brake actuated by induced currents becomes an essential device in the practical classes of electrical machines. It is proposed in this paper a methodology for design of a teaching module of an electromagnetic brake (Brake of Foucault), capable of imposing adjustable mechanical load, without the need for direct measurements of torque. The module must have a low final cost and may be used in analyzing the performance of an induction motor from empty to full load. Palavras Chave - Freio eletromagnético, módulo didático, motor de indução, testes e ensaios.