Abstract
This paper presents the active magnetic bearing control system synthesis and practical rotor dynamic experiences with a supercritical 250 kW turbo compressor. First, the physical boundary conditions of passing the first bending critical speed and feasible bearing characteristics near the critical speed are considered. Then, the control system is synthesized and analyzed using complex formulation. A synchronous response controller is added in parallel with the position controller in order to achieve the preferred bearing characteristics. Finally, measured performance of the control system when passing the critical speed with a real life compressor is presented.
