Elevator – industrial lift truck – or stationary lift for vehicle – Having specific guide shoe
Patent
1995-10-31
1998-05-12
Terrell, William E.
Elevator, industrial lift truck, or stationary lift for vehicle
Having specific guide shoe
187292, 187394, 187401, B66B 704
Patent
active
057494444
ABSTRACT:
A contactless slide guide or magnetic bearing for guiding an elevator vertically along a hoistway rail has one or more electromagnet actuators spring-mounted within a yoke attached to the elevator car at a corner thereof. The positioning of the electromagnets within the yoke is such that they are positioned extremely close to the surface of the rail so as to form a magnetic bearing having a gap of just a few millimeters, and which is controlled in a position feedback control loop to keep the gap constant. The contactless slide guide may be used for low-rise buildings with a rigid connection between the yoke and the elevator, or may be used in conjunction with an active suspension system more typically used in mid- to high-rise buildings. The active suspension system may be used, for example, in conjunction with a pendulum car suspended within the elevator frame to which contactless slide guides are attached at the top and bottom. The active suspension is controlled with a feedback control system that is completely separate from the position control loops used to control the individual contactless slide guides.
REFERENCES:
patent: 4750590 (1988-06-01), Otala
patent: 4754849 (1988-07-01), Ando
patent: 5027925 (1991-07-01), Kahkipuro
patent: 5193651 (1993-03-01), Shigeta et al.
patent: 5294757 (1994-03-01), Skalski et al.
patent: 5304751 (1994-04-01), Skalski et al.
patent: 5308938 (1994-05-01), Roberts et al.
patent: 5321217 (1994-06-01), Traktovenko et al.
patent: 5322144 (1994-06-01), Skalski et al.
patent: 5329077 (1994-07-01), Skalski et al.
patent: 5367132 (1994-11-01), Skalski et al.
patent: 5373123 (1994-12-01), Skalski
patent: 5379864 (1995-01-01), Colby
patent: 5400872 (1995-03-01), Skalski et al.
patent: 5439075 (1995-08-01), Skalski et al.
patent: 5547059 (1996-08-01), Wantanabe et al.
patent: 5652414 (1997-07-01), Roberts et al.
"A Magnetic Bearing Control Approach Using Flux Feedback" NASA Technical Memorandum 100672, Mar., 1989.
"Attitude Control System of a Super-high Speed Elevator Car Based on Magnetic Guides", H. Inaba, et al, IEEE IECON '94, Bologna, Italy, Sep. 5-9, 1994.
Otis Elevator Company
Terrell William E.
Tran Khoi H.
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