When it comes to intelligent manufacturing, it is necessary to mention the core of industrial automation equipment - servo system. What is a servo system? Servo system is to make the machine according to the instructions to achieve displacement, speed and torque and other actions of the equipment general name, by the controller, servo drive and servo motor, supplemented by the encoder composed. Simply put, "servo" is synonymous with "precise control" of the machine, which determines the accuracy and response speed of the automated machinery.
At present, China is evolving from a manufacturing country to a powerful country, and the demand for motion control products is increasing day by day. However, China's servo system market developed late, has been dominated by foreign brands for a long time, and the price remains high. In recent years, the rise of domestic brands, domestic servo system price performance gradually improved, in the fields of machine tools, textile machinery, robots into the accelerated import substitution stage.
In the imported servo system replacement period, a number of domestic entrepreneurial enterprises were also born, they delve into sophisticated technology, and quickly join the queue to promote the development of China's intelligent manufacturing.
Servo system cost reduction and efficiency, but a large number of domestic dependence on imports
According to the "2016-2022 China Servo System Market Operation Situation and Investment Strategy Research Report" released by Zhiyan Consulting, in 2016, foreign servo companies in China's market share reached 75%, of which Japanese brands accounted for half of the share. Famous brands include Japan's Panasonic, Mitsubishi Electric, Yaskawa and so on; European and American brands account for 25%, Germany has Siemens, Bosch Rexroth, Schneider and other companies; Domestic brands account for less than 20% of the market.
At present, many European and American countries have achieved full automation or standardization, and the domestic has just started. Especially in high-power servo motors and servo drives, the technology of European and American companies has been leading, so the price of a high-power motor can be as high as 400,000. The high price, resulting in many enterprises are not willing to spend the cost to replace equipment, improve production efficiency, therefore, the overall efficiency of intelligent manufacturing can not be improved. Once the parts of the servo system are localized, the price can be reduced to 100,000-200,000, which will promote the upgrading of industry equipment, "this is the real value of the industry."
Many industries used to use hydraulic technology, and now if you use servo, the efficiency will be increased several times. Not only that, replacing the original traditional equipment with a new motor has greatly improved production efficiency and also achieved industrial upgrading. With the new motor, the mold loss is much smaller, and enterprises are willing to try to replace.
High-power motor energy saving 30%, how is the servo system to do?
And why can servo motors improve efficiency on a large scale? This is determined by the structure of the servo motor.
From an energy point of view, it is more energy efficient. Servo motor is mainly composed of stator and rotor, stator has two windings, excitation winding and control winding. The rotor inside is a permanent magnet or an induction coil, a magnetic conductive material, and the rotor rotates under the action of a rotating magnetic field generated by the exciting winding. Servo motor is also called synchronous motor, rotor does not need to consume electricity. In the traditional industrial asynchronous motor, the rotor part has been energized. In this regard, high-power motors are more obvious, and a 100kw device will save a lot of costs if it can save 30% energy.
Another feature is that the starting torque of the servo motor is relatively small, and the start is faster and the sound is smaller.
Another is that the servo motor can be controlled with high speed and precision. The servo system can make the motor hover between stop and rotation, which not only solves the problem caused by the shortcomings of the motor start moment, but also enables the servo drive to quickly rotate the motor when it receives the external "motor rotation" instruction.
The traditional hydraulic drive method has low cost and simple design, but it has problems of low efficiency and not high enough accuracy, and the servo system will be more energy saving, improve efficiency, and the life of the equipment will be longer.
Servo system according to the power size can be divided into small, medium and large servo system. Small servo usually refers to the power of less than 1KW products, mainly used in industrial robots, electronic manufacturing, textile packaging equipment and other small machinery; Medium servo power range in 1-7.5KW, mainly used in milling machine, injection molding machine and other fields; Large servo system power greater than 7.5KW, mainly used to drive heavy machinery equipment.
Limited by power electronic devices and permanent magnet materials, early servo motors and drivers had small power and limited applications. In recent years, thanks to the rapid development of new material technologies such as semiconductors, the power of servo systems has been continuously expanded. However, China's high-power and high-precision servo motors are still mainly dependent on imports.
The future of giant: Customer-oriented, solution provider
At present, in the field of servo systems, more or scattered small manufacturers, there is no giant. The industry giants in the future industrial field must not be simple parts providers, but overall solution providers. This is different from simply piecing together a variety of product integrators, the future giant must be able to accurately select the market, integration ability, and have a deep understanding of the industry and customers of the enterprise.
To establish a foothold in the market, or even become a giant, start-ups must first focus on the market, choose a single point of breakthrough, not only look at the market size, but to find gaps and value points. Do not play a small role in the big market, go to the corner for a share of the market, and dare to be the leader of the market segment. After building a powerful market, Tongyi established its own brand.
And to avoid the industry price war, vicious competition, the servo system itself and the vertical industry combined to provide a total solution to meet the needs of the industry.
To truly understand the industry, the best way is undoubtedly to understand and serve customers in every different field.