Application of Direct Optimization Method by Zooms to Improve the Performances of AC Electromagnet
Journal Title: ANALELE UNIVERSITATII DIN CRAIOVA - Seria Inginerie electrica - Year 2018, Vol 42, Issue 0
Abstract
The paper seeks to improve the force developed by an AC electromagnet at maximum air-gap, using the direct optimization method by zooms, based on numerical experiments performed by finite element method (FEM) in ANSYS software. In a previous work, a 5.68% improvement in the static force characteristic of the same device was achieved and particularly, a 12.63% improvement in the force at maximum air-gap, taking into account three very influential geometrical parameters: the rate of bottom core thickness, rate of ring width and the rate of lateral core thickness. The optimization problem was subject to constraints of maintaining the overall dimensions of the device. The research continues in this paper with the search for the optimal geometrical configuration to provide a maximum developed force in the "open" position, replacing the parameter rate of ring width, having the least influence, with the parameter rate of winding thickness and adding the constraint of maintaining the cross-section of the winding. A device screening ensures that all the new three parameters are worth considering with a confidence level greater than 99%. The solution of the optimization problem brings an improvement of 25.67% of the acting force and of 7.09% of the static characteristic. The magnetic force was determined based on the principle of virtual work, available in ANSYS software.
Authors and Affiliations
Alin-Iulian Dolan
Keywords
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