ゼロバイアス電流方式によるセルフセンシング磁気軸受 [in Japanese] Self-Sensing Active Magnetic Bearings with Zero-Bias-Current Control [in Japanese]
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A zero-bias-current self-sensing active magnetic bearing is proposed. One degree-of-freedom (DOF) of the rotor is controlled by a pair of electromagnets which are alternatively energized by the proposed circuit. The rotor position of the one DOF is measured by using both electromagnets: the non-energized electromagnet also contributes to the position sensing. The proposed method gives good linearity in the position estimation. The controller of the magnetic levitation consists of a digital signal processor, DSP, which compensates the nonlinearity of the magnetic force and achieves good damping. In the experiment, the rotor can run at 45000min<sup>-1</sup>.
- IEEJ Transactions on Sensors and Micromachines
IEEJ Transactions on Sensors and Micromachines 126(10), 1399-1405, 2006-10-01
The Institute of Electrical Engineers of Japan