Magnetic field confinement for magnetically levitated vehicles

Details Magnetic field confinement for magnetically levitated vehicles Magnetic field confinement for magnetically levitated vehicles

1992-01-17

1993-05-25

Le, Mark T.

Railways

Magnetically suspended car

104286, 104282, B60L 1304

Patent

active

052130460

ABSTRACT:
A magnetically levitated vehicle adapted for movement along a guideway, comprising a passenger compartment, at least first and second primary magnets and a plurality of confining magnets. The first and second primary magnets are secured on the vehicle to produce a magnetic field having a magnetic flux density extending outward from the primary magnets, to support the vehicle spaced from and to move the vehicle along the guideway. The plurality of confining magnets are disposed on the vehicle to confine the magnetic flux extending outward from the primary magnets and to reduce the strength of the primary magnetic field in the passenger compartment. Preferably, the confining magnets maintain the strength of the magnetic field in the passenger compartment below 5 gauss; and even more preferably, those magnets are used to maintain the strength of the primary magnetic field in the passenger compartment below 1 gauss. The confining magnets attenuate both the dc and ac fields in the passenger compartment, and also actually improve the concentration of magnetic flux available for levitation.

REFERENCES:
patent: 3820471 (1974-06-01), Maki et al.
patent: 3890906 (1975-06-01), Maki
patent: 4198910 (1980-04-01), Gottzein et al.
patent: 4273054 (1981-06-01), Yamashita et al.
patent: 4276832 (1981-07-01), Sika et al.
patent: 4299173 (1981-11-01), Arima et al.

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