Size Optimization of Release Assembly of Air Circuit Breaker

Abstract

The focus of this project is on the design and construction of the fast acting linear actuator. These linear actuators are used for providing trip force to operate mechanism which close and open contact of air circuit breaker. These actuators are rated on different ranges of rating used for auxiliary supply. This project has been carried out in a manner such that it improves performance and optimization size of air circuit breaker’s release assembly. The mathematical model will be created of the present design. The main problem for this type of device is that its response cannot be estimated due to magnetic property depends on the internal molecular structure of any material. This project has main aim for optimization of size and input power by making no change in its performance mainly operating time, force output and impact force. For this, the FE - model has been developed to analyze the distribution of electromagnetic force; after that, the results of the FEM analysis, the results of numerical analysis and experimental results were compared for verifying the developed mathematical-model. A 3-dimensional electromagnetic FE-model had been developed using popular FE-Analysis computer programs, like ANSYS/MAXWELL, JMAG and MAGNET. Based on this study, new optimized designs have been prepared for further study. Mathematical model have been further improved by feedback from testing of different designs. At successfully completion of this project, a new electromagnetic release assembly has been designed for air circuit breaker.