抄録
This paper proposes practical selfsensing technique for active magnetic bearing (AMB). Magnetic levitation system is always unstable, hence gap displacement sensing is required for feedback control. The separate gap sensor has the problem of high cost and noncollocate installation from the actuation position. To overcome these problems, selfsensing technique has been proposed which is the combination of actuator and sensor. In this paper, a differential transformer type selfsensing is proposed for hybrid-type AMB. Its principle and schematic design are described. The selfsensing actuator is designed using magnetic field analysis.
