Linear eddy current brakes Eddy current brake

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eddy current brakes on roller coaster goliath made intamin, @ walibi holland (netherlands)


linear eddy current brakes used on vehicles ride on rails, such trains. used on roller coasters, stop cars smoothly @ end of ride.


the linear eddy current brake consists of magnetic yoke electrical coils positioned along rail, being magnetized alternating south , north magnetic poles. magnet not touch rail, held @ constant small distance rail of approximately 7 mm (the eddy current brake should not confused device, magnetic brake, in wide use in railways, exerts braking force friction of brake shoe rail). works same disk eddy current brake, inducing closed loops of eddy current in conductive rail, generate counter magnetic fields oppose motion of train.


the kinetic energy of moving vehicle converted heat eddy current flowing through electrical resistance of rail, leads warming of rail. advantage of linear brake since each section of rail passes once through magnetic field of brake, in contrast disk brake in each section of disk passes repeatedly through brake, rail doesn t hot disk, linear brake can dissipate more energy , have higher power rating disk brakes.


the eddy current brake not have mechanical contact rail, , no wear, , creates no noise or odor. eddy current brake unusable @ low speeds, can used @ high speeds both emergency braking , regular braking.


the tsi (technical specifications interoperability) of eu trans-european high-speed rail recommends newly built high-speed lines should make eddy current brake possible.


the first train in commercial circulation use such braking system has been ice 3.


modern roller coasters use type of braking, in order avoid risk posed potential power outages, utilize permanent magnets instead of electromagnets, not requiring power supply, however, without possibility adjust braking strength electromagnets.








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