The bearings developed at Livermore employed cylindrical magnet arrays to sta INDUCTRACK MAGLEV SYSTEM could allow trains to glide across the country. Apr 3, High reliability and lower maintenance and operating costs make magnetic levitation (maglev) technology integral to advancing the nation’s. May 9, By contrast, maglev requires complex and expensive infrastructure Called the Inductrack, the new system is passive in that it uses no.

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These currents produce a magnetic field that repels the array, maglevv levitating the train car. Inductrack II thus has lower drag forces higher levitation efficiency at low speeds than Inductrack I, an important asset for an urban maglev system. When neodymium—iron—boron permanent magnets are used, levitation is achieved at low speeds.

Inductrack – Wikipedia

The track thus creates its own magnetic field which lines inudctrack with and repels the permanent magnets, creating the levitation effect. In contrast, passengers must be magnetically shielded on maglev trains employing superconducting coils. The code predictions are shown for zero and plus and minus 1. Originally conceived for particle accelerators, Halbach arrays concentrate the magnetic field on one side, while canceling it on the opposite side.

The Inductrack: A Home-Grown Maglev System for our Nation

Some maglev train cars, for example, employ superconducting coils to generate their magnetic field. Magnetic propulsion uses the concepts and applications of electromagnets in order to propel an object. To use this website, you must agree to our Privacy Policyincluding cookie policy. The team which also includes several engineering firms in the Pittsburgh, Penn.

About project SlidePlayer Terms of Service. Above a minimum speed, as the velocity of the train increases, the levitation gap, lift force and power used are largely constant.

However, as soon as the train exceeds a transitional speed of 1 to 2 kilometers an hour a slow walking speedwhich is achieved by means of a low-energy auxiliary power source, the arrays induce sufficient currents in the track’s inductive coils to levitate the train.

In this sense, Inductrack is a true fail-safe system. If the external drive power ever fails, or when the train arrives at a station, the train cars would simply coast to a stop, easing down on their auxiliary wheels.


In June, a test vehicle consisting of a single, full-scale chassis unit a mass transit vehicle has two chassis units was shipped to GA from Hall Industries in Pennsylvania.

Hyperloop Transportation Technologies announced jnductrack March of that they would be using passive Inductrack systems for their titular Hyperloop. A full-scale train might use an electronic drive system, as found on experimental German trains, or even a jet turbine, as proposed by Inductrack engineer Smith.

The study found that while an Inductrack system would cost more to build than conventional rail systems, it should be less expensive than maglev trains using superconducting coils. The Livermore battery uses circular Halbach arrays both to generate power and to achieve nearly frictionless magnetic bearings that minimize the loss of stored energy. As a Halbach magnet array passes over the loops of wire, the sinusoidal variations in the field induce a voltage in the track coils.

UCRL November 7, Application information about Transrapid magnetic. Each coil was shorted at its ends to form a closed circuit but not otherwise connected to any electrical source. Livermore is one of the few institutions to explore the uses of the Halbach array.

The test runs demonstrated the system’s totally passive nature, meaning that achieving levitation requires no control currents to maintain stability, and no maaglev supplied currents flowing in the tracks. The horizontal component of the magnetic fields from the upper and lower Halbach arrays are additive, while the vertical field of the lower array opposes that of the upper array.

If the power suddenly fails, the train cars remain levitated while slowing down to a low speed, at which point the cars come to rest on their wheels.

With Inductrack, the train needs only a source of drive power to accelerate it to levitating speed, keep it powered, and provide braking. Inductack advantages of maglev in urban settings relative to conventional urban rail systems include: Preliminary ineuctrack indicate that a full-scale Inductrack system for magnetically launching large rockets should be technically feasible.

At low speeds the loops are a largely resistive impedance, and hence the induced currents are highest jnductrack the field is changing most quickly, which is around the least intense parts of the field, thus little lift produced.


These coils require expensive, cryogenic cooling systems. Second, at about the same time as the Halbach arrays were conceived, permanent magnets made of an alloy of neodymium, iron, and boron were developed and put into large-scale production for such applications as computer hard drives. However, at speed, the impedance of the coils increases, proportionate to speed, and dominates the composite impedance of the coil assemblies.

This occurs because the inductive impedance increases proportionately with speed which compensates for the faster rate of change of the field seen by the coils, thus giving a constant current flow and power consumption for the levitation.

Full-Scale Test Track under Construction In May innductrack, GA broke ground at its San Diego facility on a meter-long, full-scale test track, which will feature both straight and curved meter radius sections. Contactless energy transfer system Linear electric motor and guidance system Magnetic levitation inductor Emergency pavement Emergency guidance And braking system Proposed inand under study sincethe Swiss-Metro system would carry passengers in train cars running every 6 minutes.

We think you have liked this presentation. If the system were to lose power, the train would remain stably levitated until it slows to walking speeds, at which point it would settle down on auxiliary wheels.


The windings are used with a linear synchronous motor to power and brake the train. Maglev on the Development Track for Urban Transportation. There are three designs: The new design is simpler and should be lower in cost to manufacture than the litz-wire matlev track. The cost and complexity of presently developed high-speed maglev trains has slowed their deployment.

A capacitor is used to energize the solenoid coil. Lower noise, lower maintenance, higher efficiency, higher grade and tighter turn capabilities allowing operation on elevated tracks that can accommodate to an urban environment without the need for underground-tunnel operation. External Power Needed Post notes that a power source is needed to accelerate the cart to its operating speed of 10 to 12 meters per second.

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