| Title |
A Study on Optimal Design of Eddy-Current type EM Damper Using a Halbach Array |
| Authors |
박광우(Kwang-Woo Park) ; 정태욱(Tae-Uk Jung) |
| DOI |
https://doi.org/10.5370/KIEE.2024.73.1.81 |
| Keywords |
EM damper; Eddy current; Halbach array; Optimal Design; Active-damping |
| Abstract |
This paper presents the design of an eddy current type EM(Electromagnetic) damper using permanent magnets and copper to compensate for a active damping in small-scale devices. Conventional mechanical dampers have difficulty achieving active damping compensation or involve complex systems, whereas MR dampers can adjust damping force based on input current, but have the disadvantage of additional power supply. The eddy current type EM damper presented in this paper can provide active damping compensation without additional power supply using permanent magnets and copper cylinder. This damper was designed using a Halbach array that can have a high magnetic flux density in the air gap because it aims to compensate for sufficient damping force according to vibration characteristics even at a small size, and the validity of the Halbach array was verified by comparing the damping force according to the magnet direction through finite element analysis. To provide for even higher damping forces within the spatial constraints, the key parameters of the damper were selected through response surface methodology, and an optimization process was performed. The optimized eddy current type EM damper, as a result, was confirmed to provide the target damping force of 30N. Future research aims to design a stator of a coil-type EM damper that can recover electrical energy while providing damping force. |