Magnetic bearing device

Details Magnetic bearing device Magnetic bearing device

1997-04-10

1998-04-07

LaBalle, Clayton E.

Electrical generator or motor structure

Dynamoelectric

Rotary

310 90, 318632, 318629, H02K 709

Patent

active

057368023

ABSTRACT:
A magnetic bearing device comprises a radial magnetic bearing having a plurality of radial electromagnets for contactlessly supporting a rotary body radially thereof, a radial displacement detector for detecting the radial displacement of the rotary body, and a radial PID control circuit for controlling drive current for the electromagnets based on a radial displacement signal from the detector. The device further comprises a negative feedback circuit for negatively feeding back the output signal of the control circuit to the input of the control circuit via a notch filter.

REFERENCES:
patent: 4308490 (1981-12-01), Habermann et al.
patent: 4795927 (1989-01-01), Morii et al.
patent: 4879500 (1989-11-01), Kanemitsu
patent: 5142177 (1992-08-01), Higuchi et al.
patent: 5202824 (1993-04-01), Chen
patent: 5256952 (1993-10-01), Yoneyama et al.
patent: 5313399 (1994-05-01), Beale
patent: 5469007 (1995-11-01), Toyama
"Improved Notch Filter for Synchronous-Response Control", Johnson et al., NTIS Tech Notes (Aug., 1991), p. 639.
"Control of Unbalance Response with Magnetic Bearings", by C.R. Knospe et al., Proceedings of the 1992 ACC, Jun. 24, 1992.

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