9. The first self-driven deformable liquid metal machine came out
The joint research team of the Institute of Physics and Chemistry of the Chinese Academy of Sciences and the Medical College of Tsinghua University, led by Liu Jing, found that liquid metal can be moved in a deformable machine for a long time at high speed after ingesting a small amount of material, realizing independent movement without external power. This discovery is the first in the world, and related papers are published in the journal Advanced Materials. It marks that China has reached the world's leading level in the field of liquid metal. This liquid metal machine is completely free of the complicated external power system and has taken a crucial step towards the development of independent and independent flexible machines.
"Nature" magazine reported on the topic of "Liquid metal motor on its own movement" in its research highlights; "Science" magazine also pointed out on the website that "deformable metal motor has a series of uses."
10, "permanent magnet high-speed rail" traction system passed the first round of line test assessment
China's first permanent magnet high-speed rail, equipped with the permanent magnet synchronous traction system developed by China CRRC, passed the test of the first-round line operation test at the end of October 2015. This means that China's high-speed rail power is undergoing revolutionary changes and has become one of the few countries in the world to master the "permanent magnet high-speed rail" traction technology. The traction system includes core components such as permanent magnet synchronous traction motor, traction transformer, converter and controller. The motor adopts the world's new rare earth permanent magnet material, which effectively overcomes the world problem of permanent magnet loss of magnetism; its ingeniously designed bearing heat dissipation The structure can effectively reduce the bearing temperature rise and ensure the safe and reliable operation of the traction power;
At the same time, the wide-area and efficient control technology strategy is adopted to realize high-speed square wave weak magnetic control and high-speed and stable re-injection; the whole traction system reflects the matching of energy-saving and high-efficiency system characteristics, and energy saving is more than 10%. Its successful development not only opened the prelude of China's high-speed rail "permanent magnet drive era", but also won the first opportunity for China's high-speed rail to participate in international competition.