Control apparatus of magnetic bearing

Details Control apparatus of magnetic bearing Control apparatus of magnetic bearing

1992-06-26

1993-09-21

Stephan, Steven L.

Electrical generator or motor structure

Dynamoelectric

Rotary

361144, H01K 709, H01H 4700

Patent

active

052472191

ABSTRACT:
A control apparatus of a magnetic bearing controls electromagnets so that both a displacement deviation of a center of gravity of a rotary shaft and an angle of twist around the center of gravity of the rotary shaft become 0, thereby supporting the rotary shaft in space by the magnetic force of the electromagnets. The apparatus includes .theta..sub.X and .theta..sub.Y control devices for controlling angles .theta..sub.X and .theta..sub.Y of twist of the two degrees of freedom of a rotational motion orthogonal to each other around the center of gravity and perpendicular to an axial direction of the rotary shaft, a cross feedback being produced so that both a feedback signal of the rotary angle .theta..sub.X and a feedback signal of the rotary angle .theta..sub.Y are respectively fed back as cross feedback signals to the .theta..sub.Y and .theta..sub.X control devices. A rotational speed detecting device for detecting a rotational number of the rotary shaft. Each of the control devices includes a break frequency and gain value varying device which has a break frequency not larger than a reply frequency of the entire control apparatus with respect to the cross feedback signal, the varying device varying the break frequency of the lowpass filter in inverse proportion to the rotational speed of the rotary shaft, and varying a gain value of the cross feedback signal in proportion to the detected rotational speed of the rotary shaft.

REFERENCES:
patent: 4154489 (1979-05-01), Lyman
patent: 4686404 (1987-08-01), Nakazeki et al.
patent: 4697128 (1987-09-01), Matsushita et al.
patent: 4839550 (1989-06-01), Mizuno et al.
patent: 4841212 (1989-06-01), Matsushita et al.
patent: 4885491 (1989-12-01), Hiyama
patent: 4912387 (1990-03-01), Moulds, III
patent: 5084643 (1992-01-01), Chen
patent: 5155402 (1992-10-01), Bichler

Affiliated with

Also associated with

Rating

Control apparatus of magnetic bearing does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Control apparatus of magnetic bearing, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Control apparatus of magnetic bearing will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1052798