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Micro Motor,
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Chang'e-3 flew into the sky early in the morning of February 2 and is expected to make a soft landing in the moon's Rainbow Bay Area in the middle of this month. The setting of the moon should be accurate and stable, the "nerve fiber" of the detector must be smart, and the "joint" must be sensitive.
"Chang'e's flight to the moon is very different from the return of manned space flight. The moon landing mission is carried out in an airless environment, not by parachute, but by thruster. We have participated in the development of sensors and many special motors for reverse thrust engines. This is exactly where developed countries have blocked our technology. " Xiong Qunli, deputy commander in chief of lunar exploration project and general manager of China Electronics Technology Group, said.
The motor enables the moving parts in engineering to accurately execute the command and control of the brain. According to the introduction, more than 30 kinds of chang'e-3 detector motors are distributed in the antenna, battery array, imaging system, mast system, mechanical arm system, detection sampling system and other subsystems. After several flight verifications, they have reached the aerospace requirements of high level and reliable operation, reflecting the strength of domestic motor (Shunchang motor, a domestic professional micro motor manufacturing company).
"Three girls" lunar soft landing, relying on 7500 cattle variable thrust engine to complete deceleration, hovering and a series of actions. The choice of thrust is realized by a small cylindrical motor.
Li Tingbin, an engineer of CETC, said that the principle of the motor is like the accelerator of a car, which controls the opening and closing of the valve through displacement. The larger the valve is, the more oil flows, the greater the thrust of the engine. "The combination of stepping motor and screw rod is the first time to enter space." He said that the important reason for boldly using this scheme is that the task requires high precision.
Before landing, the lander will hover for a short time to avoid obstacles, scan the lunar terrain and select the appropriate 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 topographic map. If the scanning accuracy is not high, the image will be distorted, and the "three girls" who landed according to the wrong map are likely to fall "seriously injured" when they are in close contact with the moon.
After the "Yutu" began to inspect the lunar surface, the ground control personnel must rely on the sine cosine resolver to master its situation. Unlike other motors, the function of sine cosine resolver is to convert motion signal into electrical signal. For example, if the wheel turns a few degrees, the motor will record it and send a current signal to the system. How high the mast rises and how hard the manipulator holds can be fed back by the rotation angle of the motor.
"The motor is a" small, big role, micro product, big industry. ". It can be said that the development of Micromotor / micromotor represents the advanced level of the device. " Shi Jinhao, an expert on components of China Electronics Technology Co., Ltd., said.
A small motor is the heart of a product, so when considering the motor in product design, it is very important to choose an appropriate motor and the appropriate motor parameters! --Shunchang motor, professional production of micro motor,
DC Motor, reducer motor, all kinds of micro brush permanent magnet motor
