The magneplane system

Kolm, Henry H.; Thornton, R.D.; Iwasa, Y.; Brown, W.

doi:10.1016/0011-2275(75)90003-x

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XI1

The Problem Of Ride Quality Control1

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1988

2013

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Cited by 21 publications

(2 citation statements)

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“…The system in question has been described, patented and demonstrated on a small scale (Kolm, Thornton 1972;Kolm, Thornton, Iwasa, Brown 1975). However, the US government (unlike Germany and Japan) has never invested in magnetic levitation technology so the Magneplane system has never been scaled up to the next level (which would cost quite a few millions of dollars).…”

Section: XImentioning

confidence: 99%

On the practical limits to substitution

Ayres

2007

Ecological Economics

193

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Section: XImentioning

confidence: 99%

On the practical limits to substitution

Ayres

2007

Ecological Economics

193

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“…The MIT team of Kolm, Thornton, Brown and Iwasa [12] studied the stability of the EDS magneplane system with a 1/25th-scale model and found the suspension to be underdamped and prone to catastrophic accelerations. One important development for vertical control was the use of the linear synchronous motor for heave damping.…”

Section: The Problem Of Ride Quality Controlmentioning

confidence: 99%

Flux-canceling electrodynamic maglev suspension. II. Test results and scaling laws

Thompson¹,

Thornton

1999

IEEE Trans. Magn.

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Electrodynamic suspensions (EDS) are highly undamped and require some form of active control or a secondary suspension to achieve adequate ride quality. This paper reports on efforts to develop a version of EDS that uses controllable magnetic forces to eliminate the need for any secondary suspension. The magnetic forces act directly on the guideway and avoid the need to have unsprung weight and a secondary suspension. It is shown that the energy required to effect this control can be less than 1% of the energy stored in the suspension magnets, so a modest size controller can be used. The same controller can also provide lift at very low speeds and thereby eliminate the need for a separate low-speed suspension system. A set of scaling laws is described which is used to size a full-scale hightemperature superconductor (HTSC)-based suspension magnet. The test fixture was also used to verify the use of "zero velocity" lift, where ac excitation is used in the suspension coils to achieve lift at low train velocity.

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Levitation

Hull¹,

Sheahen²

2002

Introduction to High-Temperature Superconductivity

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The magneplane system

Cited by 21 publications

References 5 publications

On the practical limits to substitution

On the practical limits to substitution

Flux-canceling electrodynamic maglev suspension. II. Test results and scaling laws

Levitation

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