This work presents the compact radial-axial 3D PCB capacitive position sensor. The FEM model, numerical analysis and prototype verification are presented. The capacitances of circuit are estimated using 3D model and are verified based on spectral analysis. The open and closed-loop measurements prove feasibility in applications related to rotating machinery.
The traditional control method for active magnetic bearings uses a bias current to linearize control at the operation point. In this paper a flux-based controller with the zero bias current for radial magnetic bearings is presented. The controller is implemented in FPGA and functionality is verified with the co-simulation.
A commissioning and laboratory tests of an active magnetic bearing supported PM 3kW blower are presented. The motor operation is evaluated in no-load and load tests. An identification of AMB-rotor system, testing of H<sub>∞</sub> centralized control and mass-flow of the blower for recirculation of anode gas in a SOFC are discussed. The key results… (More)