Northern Arctic Federal University (NArFU) has developed and patented an innovative method that eliminates losses in electric motor windings, the university's press service reported.
The new development is necessary to extend the operating time of the superconducting winding without the need for recharging from external power sources.
NArFU's development will fundamentally change energy systems in all areas where superconducting windings are used: electromagnets in large scientific installations, energy storage devices for stabilizing the power grid, magnetic resonance imaging, high-speed magnetic levitation trains, superconducting electric machines for aviation, ships, and wind power plants.
Known methods for creating superconducting closed magnetic windings have a drawback: energy losses occurred in the contact connections. The development was carried out without contact connections. This completely eliminates the active resistance of the winding and current attenuation.
Current is introduced into the winding without physical contact using magnetic induction. For this, the coil is placed in a cooling medium (liquid nitrogen or helium) with a temperature below 180°C.
Unlike conventional methods of supplying current, where you can only transmit the power that is in the source, with the help of a special magnetic field you can "pump" the current until it reaches a critical value (for a superconductor, this value exceeds the nominal current of copper conductors by hundreds of times). You can introduce current into the winding once, and it will circulate in it indefinitely, turning the winding into a super-powerful electromagnet or magnetic energy storage device.
This technology can be used to create generators for wind power plants or engines for aircraft with superconducting rotors.
Superconducting electrical machines are much smaller and lighter than traditional counterparts with copper windings of comparable power. The machine is lighter and more powerful, since steel is not required in the rotor to create magnetic force, and the intensity of the magnetic field can be higher than when using heavy permanent magnets.
The appearance of a winding with zero current loss will be especially important in the development of the Arctic, on the Northern Sea Route, for the operation of spacecraft and in other industries where an intense magnetic field or energy storage is required.
Earlier, www1.ru reported that a unique technology for the production of gas turbine aircraft engine blades was developed in Russia.
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