Test Bench for Three Phase Permanent Magnet Biased Radial AMBs with a Sensorless Control Strategy Based on INFORM Method

In this paper a test bench for permanent magnet biased radial Active Magnetic Bearing (AMB) with respect to a sensorless control strategy based on INFORM method is presented. The purpose of this Hybrid Magnetic Bearing (HMB) prototype is to research the capability of the INFORM method for sensorless control of HMBs. The well known INFORM method for sensorless control of Permanent Magnet Synchronous Motors (PMSM) is adapted for the HMB and also described in principle. For the test bench a three phase MOSFET inverter was build up. First measurement results of the INFORM capability are presented.