SCMaglev

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File:Series L0.JPG
L0 Series maglev train at Yamanashi test track

The SCMaglev (superconducting maglev, formerly called the MLU) is a magnetic levitation (maglev) railway system developed by Central Japan Railway Company (JR Central) and the Railway Technical Research Institute.[1][2][3]

The SCMaglev uses an electrodynamic suspension (EDS) system for levitation, guidance, and propulsion.

In development since the 1960s, the SCMaglev system will be used in the Chūō Shinkansen rail line between Tokyo and Nagoya, Japan. The line, currently under construction, is scheduled to open in 2034 (after delays pushing back its original opening date of 2027.) JR Central is also seeking to sell or license the technology to foreign rail companies. The L0 Series, a prototype vehicle based on SCMaglev technology, holds the record for fastest crewed rail vehicle with a record speed of Template:Convert.[4]

Technology

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File:JR Maglev-Model-truck.JPG
MLX01 maglev train superconducting magnet bogie
File:JR Maglev-Levitation and Guide Coils.JPG
Levitation and guidance coils

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The SCMaglev system uses an electrodynamic suspension (EDS) system. The train's bogies have superconducting magnets installed, and the guideways contain two sets of metal coils. The current levitation system uses a series of coils wound into a "figure 8" along both walls of the guideway. These coils are cross-connected underneath the track.[3]

As the train accelerates, the magnetic fields of its superconducting magnets induce a current into these coils due to the magnetic field induction effect. If the train were centered with the coils, the electrical potential would be balanced and no currents would be induced. However, as the train runs on rubber wheels at relatively low speeds, the magnetic fields are positioned below the center of the coils, causing the electrical potential to no longer be balanced. This creates a reactive magnetic field opposing the superconducting magnet's pole (in accordance with Lenz's law), and a pole above that attracts it. Once the train reaches Template:Convert, there is sufficient current flowing to lift the train Template:Convert above the guideway.[3]

These coils also generate guiding and stabilizing forces. Because they are cross-connected underneath the guideway, if the train moves off-center, currents are induced into the connections that correct its positioning.[3] SCMaglev also uses a linear synchronous motor (LSM) propulsion system, which powers a second set of coils in the guideway.

History

Japanese National Railways (JNR) began research on a linear propulsion railway system in 1962 with the goal of developing a train that could travel between Tokyo and Osaka in one hour.[5] Shortly after Brookhaven National Laboratory patented superconducting magnetic levitation technology in the United States in 1969, JNR announced development of its own superconducting maglev (SCMaglev) system. The railway made its first successful SCMaglev run on a short track at its Railway Technical Research Institute in 1972.[6] JR Central plans on exporting the technology, pitching it to potential buyers.[7]

Miyazaki test track

In 1977, SCMaglev testing moved to a new 7 km test track in Hyūga, Miyazaki. By 1980, the track was modified from a "┴" shape to the "U" shape used today. In April 1987, JNR was privatized, and Central Japan Railway Company (JR Central) took over SCMaglev development.

In 1989, JR Central decided to build a better testing facility with tunnels, steeper gradients, and curves.[6] After the company moved maglev tests to the new facility, the company's Railway Technical Research Institute began to allow testing of ground effect trains, an alternate technology based on aerodynamic interaction between the train and the ground, at the Miyazaki Test Track in 1999.Script error: No such module "Unsubst".

Yamanashi maglev test line

Script error: No such module "Labelled list hatnote". Construction of the Yamanashi Maglev Test Line began in 1990. The initial 18.4 km (11.4 mi) “priority section” in Tsuru, Yamanashi, opened in 1997, with MLX01 trains undergoing testing until the fall of 2011. At that point, the facility was closed to extend the line to 42.8 km (26.6 mi) and upgrade it to commercial specifications.[8]

Since 1997, the Chuo Shinkansen has amassed over 2,044,000 miles of test runs, averaging roughly 2,000 kilometers per day. In one record-setting day, the SCMaglev traveled approximately 2,525 miles[9] (4,062 km)—far exceeding the expected daily mileage during routine operation.

Commercial use

Japan

In 2009, Japan's Ministry of Land, Infrastructure, Transport and Tourism decided that the SCMaglev system was ready for commercial operation. In 2011, the ministry gave JR Central permission to operate the SCMaglev system on their planned Chūō Shinkansen linking Tokyo and Nagoya by 2034, and to Osaka by 2037. Construction is currently underway.

United States

Since 2010, JR Central has promoted the SCMaglev system in international markets, particularly the Northeast Corridor of the United States, as the Northeast Maglev.[1] In 2013, Prime Minister Shinzō Abe met with U.S. President Barack Obama and offered to provide the first portion of the SC Maglev track free, a distance of about Template:Convert.[10] In 2016, the Federal Railroad Administration awarded $27.8 million to the Maryland Department of Transportation to prepare preliminary engineering and NEPA analysis for an SCMaglev train between Baltimore, Maryland, and Washington, D.C.[11]

Australia

In late 2015, JR Central, Mitsui, and General Electric in Australia formed a joint venture named Consolidated Land and Rail Australia to provide a commercial funding model using private investors that could build the SC Maglev (linking Sydney, Canberra, and Melbourne), create eight new self-sustaining inland cities linked to the high-speed connection, and contribute to the community.[12][13]

Vehicles

File:ML100 RTRI 20151010.JPG
ML100 preserved at the RTRI facility in Kokubunji, Tokyo, October 2015
File:ML500 RTRI 20151010.JPG
ML500 1979 world speed record holder of Template:Convert preserved at the RTRI facility in Kokubunji, Tokyo, October 2015. A similar model caught fire at the Kyushu Test Track in 1979, leading to a redesign of the MLU series vehicles
File:MLU 001 dendoujisyaku.JPG
MLU001's superconducting magnet and a liquid helium tank on top of it
File:JR MLX01-1 001.jpg
JR–Maglev MLX01-1 at SCMaglev and Railway Park, Nagoya, April 2013
File:MLX01-3 RTRI 20151010.JPG
MLX01-3 preserved at the RTRI facility in Kokubunji, Tokyo, October 2015
  • 1972 – LSM200
  • 1972 – ML100
  • 1975 – ML100A
  • 1977 – ML500
  • 1979 – ML500R (remodeled ML500)
  • 1980 – MLU001
  • 1987 – MLU002
  • 1993 – MLU002N
  • 1995 – MLX01 (MLX01-1, 11, 2)
  • 1997 – MLX01 (MLX01-3, 21, 12, 4)
  • 2002 – MLX01 (MLX01-901, 22)
  • 2009 – MLX01 (MLX01-901A, 22A: remodeled 901 and 22)
  • 2013 – L0 Series Shinkansen
  • 2020 – Revised L0 Series Shinkansen
No. Type Note Built
MLX01-1 Kōfu-end car with double-cusp head Displayed at the SCMaglev and Railway Park 1995
MLX01-11 Standard intermediate car
MLX01-2 Tokyo-end car with aero-wedge head
MLX01-3 Kōfu-end car with aero-wedge head Displayed at the Railway Technical Research Institute 1997
MLX01-21 Long intermediate car
MLX01-12 Standard intermediate car
MLX01-4 Tokyo-end car with double-cusp head
MLX01-901A Kōfu-end car with long head Remodeled and renamed from MLX01-901 in 2009 2002
MLX01-22A Long intermediate car Remodeled and renamed from MLX01-22 in 2009

Records

Manned records

Speed [km/h (mph)] Train Type Location Date Comments
Template:Convert ML100 Maglev RTRI of JNR 1972
Template:Convert MLU001 Maglev Miyazaki Maglev Test Track February 1987 Two-car train set. Former world speed record for maglev trains.
Template:Convert MLU002 Maglev Miyazaki Maglev Test Track November 1989 Single-car
Template:Convert MLU002N Maglev Miyazaki Maglev Test Track February 1995 Single-car
Template:Convert MLX01 Maglev Yamanashi Maglev Test Line, Japan 12 December 1997 Three-car train set. Former world speed record for maglev trains.
Template:Convert MLX01 Maglev Yamanashi Maglev Test Line 14 April 1999 Five-car train set. Former world speed record for maglev trains.
Template:Convert MLX01 Maglev Yamanashi Maglev Test Line 2 December 2003 Three-car train set. Former world speed record for all trains.
Template:Convert L0 series Maglev Yamanashi Maglev Test Line 16 April 2015 Seven-car train set.[14] Former world speed record for all trains.
Template:Convert L0 series Maglev Yamanashi Maglev Test Line 21 April 2015 Seven-car train set. Current world speed record for all trains.[4]

Unmanned records

Speed [km/h (mph)] Train Type Location Date Comments
Template:Convert ML-500 Maglev Miyazaki Maglev Test Track 12 December 1979
Template:Convert ML-500 Maglev Miyazaki Maglev Test Track 21 December 1979
Template:Convert MLU001 Maglev Miyazaki Maglev Test Track January 1986 Three-car train set
Template:Convert MLU001 Maglev Miyazaki Maglev Test Track January 1987 Two-car train set
Template:Convert MLU002N Maglev Miyazaki Maglev Test Track February 1994 Single-car
Template:Convert MLX01 Maglev Yamanashi Maglev Test Line 24 December 1997 Three-car train set
Template:Convert MLX01 Maglev Yamanashi Maglev Test Line 18 March 1999 Five-car train set

Relative passing speed records

Speed [km/h (mph)] Train Type Location Date Comments
Template:Convert MLX01 Maglev Yamanashi Maglev Test Line December 1998 Former world relative passing speed record
Template:Convert MLX01 Maglev Yamanashi Maglev Test Line November 1999 Former world relative passing speed record
Template:Convert MLX01 Maglev Yamanashi Maglev Test Line 16 November 2004 Current world relative passing speed record

See also

References

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Further reading

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External links

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  5. ↑ The airline distance between Tokyo and Osaka is 397 kilometres (247 mi). To achieve an average speed of 397 km/h, such a train would need to be capable of speeds in excess of 500 km/h to allow for acceleration and deceleration times, intermediate stops, and additional distance incurred by a land route.
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