At Subra, we believe in the power of science to shape a better future. Our technologies are based on decades of scientific research – designed for sustainable impact.
A superconductor is an electrical conductor – tape, wire, or cable – which conducts direct electrical current with zero resistance when cooled. Because of this, it can transport vast amounts of electrical power, up to 300 times more compared to copper used in conventional cables, and with no energy losses in the conductor.
Energy loss
Temperature
More power
Electrical Resistance
Superconductivity is a physical phenomenon where certain materials exhibit zero electrical resistance and expel magnetic fields when cooled below a critical temperature.
When an electric current flows, in conducting materials (like copper or aluminium), electrons collide with atoms, impurities, and other electrons. This causes resistance, which dissipates energy as heat.
Superconductors behave differently at sufficiently low temperatures. They transition into the superconducting state, where the electrons pair up two-by-two. When this happens, they no longer experience collisions, and the electrical resistance suddenly drops to zero.
In this state, an electric current can flow through the material indefinitely without losing energy as heat. Energy losses during transmission in conventional copper cables prevents effective long-distance transmission.
Superconductor technology was discovered in 1911, and has evolved ever since with the development of low-temperature superconductors in the 1960’s and high-temperature superconductors in the 1980’s.
Magnetic field record of 48.7 T using high-temperature superconducting hybrid-magnet
Demonstration of 150 m 500 MW (110 kV) REBCO cable in Munich, with 15 km more to come.
First fully superconducting REBCO magnet to demonstrate 20 T at 20 K with a diameter of >1m by Commonwealth Fusion
First demonstration of a superconducting REBCO wind turbine (3MW) for commercial application in Denmark
World train speed record set by Japanese superconducting MAGLEV demonstrator (603 km/h).
First 1 km long superconducting cable operational in Essen, Germany
Superconducting magnet made from HTS REBCO tape produces 32T magnetic field
First high-temperature superconductors commercially available
The first superconducting First superconducting power cable in Copenhagen connects 150,000 homes transmission.
Discovery of REBCO type of high-temperature superconductors
First cyclotron using superconducting magnet for radiotherapy
First MRI scanners commercially available using low-temperature superconductors
NbTi alloy discovered, capable of 10 T magnetic fields
Development of low-temperature superconductors (helium-cooled)
First superconducting magnet
Discovery of superconductivity by Dutch physicist Heike Kamerlingh Onnes