Multi-objective design optimization of a permanent magnet axial flux eddy current brake

Abstract

The main aim of this study is to optimize an axial flux eddy current damper to be used in a specificaviation application. Eddy current dampers are more advantageous compared to conventional mechanical dampers asthey are maintenance-free due to contactless structure and have higher reliability, which is very desirable in aerospaceapplications. An initial eddy current brake prototype is manufactured and the test results are used to verify the 3-Dfinite element simulations. The effect of temperature on the brake performance is investigated. Finally, a multiobjectivegenetic algorithm optimization is applied to find the optimum pole number and geometric dimensions of the eddy currentbrake in order to achieve the desired torque-speed characteristic while the total weight of the brake is minimized. It isfound that the mass and volume of the initial prototype can be halved by implementing this optimization algorithm.