[JP] JR Maglev Energy Consumption

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Substation Power Systems Behind the Linear Chuo Shinkansen Maglev

The Linear Chuo Shinkansen, operated by JR Central, relies on a series of advanced substations positioned between Shinagawa and Nagoya to drive and control its superconducting maglev trains. These substations play a crucial role in transforming and converting massive amounts of electrical energy into the moving magnetic fields that propel and levitate the trains.

Each substation integrates high-performance power electronics developed in-house by JR Central. Unlike conventional rail systems, where traction motors and converters are mounted on the vehicles, the maglev system places most of these components in the ground-based infrastructure—within the guideway and substations. This arrangement drastically reduces onboard weight, which is essential for stable levitation and efficient high-speed operation at up to 500 km/h.

A key feature is the triple-redundant power feed configuration, ensuring continuous operation even if one system fails. One example, the Tsuru Substation in Yamanashi Prefecture, demonstrates how these installations manage power supply from regional utilities and regulate the energy flow to multiple sections of the guideway. The substations generate the alternating electromagnetic fields that interact with onboard superconducting magnets, enabling contact-free propulsion and braking.

The energy demand per train is approximately 35 MW at full speed, equivalent to that of a medium-sized data center. Because power consumption scales with the square of speed, the maglev’s doubling of velocity compared with the Shinkansen could theoretically quadruple energy use. However, by minimizing vehicle mass and aerodynamic drag, overall consumption has been limited to about three times that of conventional bullet trains—remarkable efficiency considering the energy required for both levitation and propulsion.

The Linear Chuo Shinkansen’s substation network represents an integration of superconductivity, high-voltage conversion, and redundancy engineering. It stands as an example of how power electronics can enable sustainable ultra-high-speed ground transport.

*Source: Nikkei XTech, Satoshi Saito, “JR東海に聞くリニア開発のいま – 超電導磁石だけが主役じゃない、リニア中央新幹線の『変電所』に潜入”, March 10, 2026.*

https://xtech.nikkei.com/atcl/nxt/colum ... 021800002/ Accessed on 2026-03-10