Non-contact magnetic suspension apparatus using distortion of pi

Details Non-contact magnetic suspension apparatus using distortion of pi Non-contact magnetic suspension apparatus using distortion of pi

1997-12-02

1999-07-13

Ramirez, Nestor

Electrical generator or motor structure

Dynamoelectric

Rotary

501166, 501876, 501877, 501878, H02K 709, H01B 1200, G11B 555

Patent

active

059231092

ABSTRACT:
A ferromagnetic member (21) of a movable part (2) is disposed on a side of a stationary part (1) such that the ferromagnetic member (21) faces a high temperature superconductor (11) of the stationary part (1). The high temperature superconductor (11) is brought into a superconductive state by cooling it to a temperature below a critical temperature in a magnetic field. The magnetic flux pinned to the high temperature superconductor (11) is caused to pass through the ferromagnetic member (21) so that an attractive force is generated between the high temperature superconductor (11) and the ferromagnetic member (21) to hold the movable part (2). When the ferromagnetic member (21) has a shape such that when the gap becomes lower than a predetermined value, the attractive force decreases, the movable part (2) can be stably suspended in a non-contacting manner, without the necessity of control, by the combination of the high temperature superconductor (11) and the ferromagnetic member (21).

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patent: 5540116 (1996-07-01), Hull et al.
patent: 5640887 (1997-06-01), Hull et al.
patent: 5729066 (1998-03-01), Soong et al.

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