Phase-Locked Active Loops for the Stabilization of Magnetic Suspensions

概要

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rights: 社団法人日本機械学会rights: 本文データは学協会の許諾に基づきCiNiiから複製したものであるrelation: IsVersionOf: http://ci.nii.ac.jp/naid/110004069073/A new active magnetic suspension system is proposed which has a displacement sensor of frequency type and uses phase-locked loop techniques for stabilization. This is termed the phase-locked magnetic suspension system (PLMS), and is studied theoretically with its basic model. It is shown that a PLMS can be stabilized with a loop filter of second or higher order. In the designed feedback system, the control input is produced from the difference in phase between the reference and feedback signals. Since phase is the integration of angular frequency, the open-loop transfer function automatically contains an ideal integration. This results in a steady-state position error of zero for step disturbances. It is also pointed out that a PLMS of self-sensing type can be realized with a switching power amplifier whose switching frequency varies with the position of the suspended object.
一般社団法人日本機械学会の論文
1994-09-15