Study of the Thermal Behavior of a Three-phase Induction Motor under Fault Conditions

• Autor(a) principal: Santiago, Fábio Emanuel Pereira
• Data de Publicação: 2017
• Tipo de documento: Dissertação
• Idioma: eng
• Título da fonte: Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
• Texto Completo: http://hdl.handle.net/10400.6/7847
• topic: Comportamento Térmico; Condição de Avaria; Métodos de Elementos Finitos; Motor de Indução de Rotor Em Gaiola de Esquilo; Perdas Energéticas; Domínio/Área Científica::Engenharia e Tecnologia::Engenharia Eletrotécnica, Eletrónica e Informática

Electric motors play an important role in the industry, because nowadays almost everything in the industry works with the auxiliary of them, either for low or high power ratings. It is possible to divide the electric motors in induction motors and synchronous motors, however the most used in the industry are the induction motors. So, it is very important to monitor its behavior throughout the time. Due to their working conditions, which sometimes can be very adverse, the motor losses can increase the inner machine temperature causing degradation of the materials which will lead to serious faults. Most severe faults may lead to a machine breakdown and interruption of the industrial production inflicting severe financial loss. The main goal of this dissertation is to create a computational model of a three-phase squirrel cage induction motor to study and analyze its thermal behavior under healthy and faulty conditions. This will be made through the finite elements method (FEM), where Flux2D 12.1 (Cedrat) software will be used. Initially the computational modeling will focus on the electromagnetic study, in order to calculate the motor losses. After that, those values will be inserted in the thermal simulation to better understand the thermal behavior of the motor. The experimental tests will be carried out with the aid of five temperature sensors (PT100), where the acquisition of the experimental data will be done through a software developed in LabView programming language. As well as that, the results obtained experimentally will be compared with those obtained computationally. However, only the results of two sensors can be compared, since two of them are placed throughout the three-dimensional perspective of the motor and one is placed inner of the motor frame, which will not be defined in the simulation.