The blockade of China's aerospace micro motor field by developed countries ultimately failed to prevent the smooth launch of Chang'e-3.

If everything goes smoothly, the Chang'e-3 lunar probe will achieve a soft landing on the lunar surface in mid December. Whether China's self-produced micro motors can help the probe land smoothly has attracted much attention.

Chang'e-3 is the second step in the Chinese lunar exploration project's trilogy of "orbiting," "landing," and "returning. But the step of 'falling' is not easy.

Ouyang Ziyuan, an academician of the Chinese Academy of Sciences and senior advisor to China's lunar exploration program, once exclaimed, "To some extent, landing on the moon is much more difficult than landing on Mars

Xiong Qunli, Deputy Commander in Chief of the Lunar Exploration Project and General Manager of China Electronics Technology Group, told reporters from China News Service that due to the lack of atmosphere on the moon, Chang'e-3 cannot land by parachute and can only rely on the 7500 Newton thrust reverser engine on the lander to complete a series of actions such as deceleration and hovering. And the choice of thrust needs to be achieved through a compact cylindrical motor.

The main designer of the motor, Li Tingbin, an engineer from China Electronics Technology Group Corporation, introduced that the working principle of the motor that gives orders to the reverse thrust engine is like the throttle of a car, controlling the opening and closing of the valve through displacement. The larger the valve, the more oil flows through, and the greater the engine thrust. The combination of stepper motor and screw is the first time to enter space, "he said. The important reason for boldly adopting this plan is because the mission requires high precision.

It is reported that before the landing of Chang'e-3, the lander will briefly hover to avoid obstacles, scan the lunar terrain, and select a suitable landing site. The rotation of the scanner is controlled by two small swing motors, and the response speed of the motors directly determines the quality of the obtained topographic map. If the scanning accuracy is not high, the image will be distorted and deformed. Chang'e, which landed according to the wrong map, is likely to fall seriously during close contact with the moon.

So, while people are concerned about how the Long March 3B carrier rocket successfully launched Chang'e-3, the tiny motors on the lander have begun to play a crucial role in a low-key manner.

If it weren't for the embargo imposed by developed countries on many components, China could have imported a complete set of measurement and control systems, including some important parts and components of the Chang'e-3 measurement and control system. "In the view of Chinese electronic components expert Shi Jinhao, European and American countries have always closed their doors to China in the fields of weapons, equipment, and aerospace motor components. Especially in space exploration and antenna deployment, motors are prohibited

Shi Jinhao gave the reporter an example that the temperature difference on the lunar surface is very large, reaching up to 150 degrees during the day and minus 180 degrees at night. In environments with significant temperature differences, the survival and survival techniques of motors are crucial. But European and American countries are holding onto these technologies and not giving them to us

Shi Jinhao bluntly stated, "This forces China to find its own way and engage in independent research and development

He said that in the face of pressure, researchers from China Electronics Technology Group constantly push their limits and provide support for multiple technologies related to Chang'e's moon mission.

In more than ten days, if Chang'e-3 can land steadily in Hongwan District, I believe it will be a huge breakthrough for China's aerospace industry, especially in the field of electric motors

Shi Jinhao said that China's new breakthroughs in the field of electric motors today will surely benefit the people tomorrow, which is the ultimate dream of China's aerospace industry.

Xiong Qunli told reporters that there are more than 30 types of motors on the Chang'e-3 probe, distributed in various subsystems such as antennas, battery arrays, imaging systems, mast systems, robotic arm systems, and detection sampling systems. Every link cannot be wrong, otherwise it will directly affect whether this lunar exploration mission can be successfully completed.