2023 Volume 31 Issue 3 Pages 394-397
Magnetic levitation systems using high-temperature superconducting bulk materials have stable levitation characteristics without control, but since the non-contact support results in low damping, an increase in resonance amplitude can be an issue in application. As a method to suppress the resonance, this review focuses on the use of two types of dampers, i.e., electromagnetic shunt dampers and gyroscopic dampers, which are a type of dynamic vibration absorber, and explains their principles and suppression effects based on our research results. Numerical calculations and experiments have confirmed that both types of dampers are effective in reducing resonance amplitude when the parameters are set appropriately. It was also confirmed that they can be effective in suppressing nonlinear resonance. Optimization guidelines still need to be studied.
