Magnetic levitation system

Details Magnetic levitation system Magnetic levitation system

1996-06-05

1998-03-31

Morano, S. Joseph

Railways

Magnetically suspended car

Including means to sense or control car position or attitude...

B60L 1306

Patent

active

057326363

ABSTRACT:
A magnetic levitation system with a near zero power-loss and a high ratio of lift-force to permanent-magnet-weight is disclosed. The present magnetic levitation system includes a ground-fixed object for sustaining a carrier device; a hybrid electromagnetic device located opposite to the ground-fixed object and having a magnetic coil, an air gap being defined between the ground-fixed object and the hybrid electromagnetic device, the attracting force being generated in the air gap, the hybrid electromagnetic device including a permanent magnet and an E-shaped electromagnet; and a feedback control device electrically connected to the hybrid electromagnetic device for generating a voltage control signal in response to a size of the air gap and the current in the electromagnetic coil, the voltage control signal controlling the attracting force to move the carrier device upwardly or downwardly.

REFERENCES:
patent: 3797403 (1974-03-01), Schwarzler et al.
patent: 3937148 (1976-02-01), Simpson
patent: 4141063 (1979-02-01), Nakamura
patent: 5067415 (1991-11-01), Morishita et al.
patent: 5258697 (1993-11-01), Ford et al.
patent: 5379864 (1995-01-01), Colby
patent: 5528210 (1996-06-01), Huang et al.

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