Transporting system of floated carrier type

Details Transporting system of floated carrier type Transporting system of floated carrier type

1987-05-13

1989-06-13

Pedder, Dennis H.

Railways

Magnetically suspended car

104284, 104293, B60L 1306

Patent

active

048381721

ABSTRACT:
In a transporting system, four magnetic units are mounted on corners of carrier and the carrier is suspended under rails by electromagnetic attractive forces acting between the magnetic units and the bottom section of the rails. Each of the magnetic unit has a permanent magnet and electromagnets and gap sensors are provided on the carrier to sense a gap between each magnetic unit and rail. A battery for supplying a current to the magnetic unit is mounted on the carrier 15. The carrier is floated in a zero steady-state power control mode, even when an external force is applied to the carrier by a zero steady-state power control circuit which maintain the steady-state current supplied to the magnetic unit to be substantially zero. The carrier is softly landed on the rail or started to move from the rail in response to an external command in a soft landing or a soft start mode by an actuating unit 67. In the soft landing and the soft start mode, the zero steady-state power control circuit is opened and the current supplied to the magnetic unit is controlled in accordance with a target value by an actuating unit.

REFERENCES:
patent: 3377616 (1968-04-01), Auer, Jr.
patent: 3736880 (1973-06-01), Ross
patent: 3899979 (1975-08-01), Godsey, Jr.
patent: 3937148 (1976-02-01), Simpson
patent: 4505206 (1986-03-01), Gottzein et al.

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