Models of Simple Iron Cored Electromagnets.pdfVIP

Excerpt from the Proceedings of the 2014 COMSOL Conference in Cambridge Models of Simple Iron Cored Electromagnets Author J.Mammadov. Flat 40, 208 Plymouth Grove, Manchester, UK. email: jahangirmcr@ Abstract: This report mainly discusses the implementation and results of a project proposal, “Modelling using Finite Element Methods”. The report is devoted to implementation, which is a model of an electromagnet. The software tool that is used to model the electromagnet is COMSOL Multiphysics, a commercial FEA package provided by the University of Manchester, Computer Science School. Additionally, the report includes other electromagnet models and their comparison with the original model. Keywords: Electromagnet, Multi-Turn Coil, Magnetic Field, AC/DC 1. Introduction Electric currents flowing through a wire generates magnetic field. A solenoid is a cylindrical wire that generates magnetic field B when it carries electric currents. A ferromagnetic material iron core multiplies magnetic field ten and even thousand times when it is added to a solenoid [1]. All electromagnets work with the same principle of iron core solenoid. The laboratory electromagnet has also the same working principle. There were many electromagnet designs in the laboratory differing in their geometry, power and materials. In this project the requirement was to model a simple iron core electromagnet, shown in Figure 1. The electromagnet has a simple geometry, which is made of two elements. It is composed of an iron core and a multi-turn coil. The electromagnet is used as part of a larger experimental apparatus, where there is a need to create a magnetic field, which can be controlled by changing the current in coils. A typical use would be to measure the magnet-optical response of novel data storage- media such as bit pattern media (BPM). Figure 1. The laboratory electromagnet. The electromagnet is experimented by measuring the dimensions