Mar
Three driving systems of industrial robots and their selection principles
The driving system of industrial robot can be divided into three categories: hydraulic, pneumatic and electric according to the power source; each of these three basic driving systems has its own characteristics, and can be combined into a composite driving system according to the needs in practical application.
①Hydraulic technology is a relatively mature technology, which has the characteristics of large power, large ratio of force (or torque) to inertia, fast response and easy to realize direct drive. It is suitable to be used in robots with large load capacity, large inertia and working in anti welding environment.
②Pneumatic drive system has the characteristics of high speed, simple structure, convenient maintenance and low price. It is suitable for medium and small load robots. But because it is difficult to realize servo control, it is mostly used in robot controlled by program, such as loading, unloading and stamping robot.
③Due to the wide use of low inertia, high torque AC and DC servo motors and their supporting servo drivers (AC inverter, DC pulse width modulator), this kind of drive system is widely used in robots.
2. Because the working environment of spraying robot needs explosion-proof, electro-hydraulic servo drive system and intrinsically safe explosion-proof AC electric servo drive system are mostly used.
It is more appropriate to use AC servo drive for special robots such as underwater robots, nuclear industrial robots, space robots, robots in flammable and explosive environments, and robots working in radioactive environments.
3. AC, DC or stepping motor servo system can be used for assembly robot with higher requirements of point repetition accuracy and running speed (≤ 4.5m / s); if the requirements of speed and accuracy are higher, DC servo drive system is used.
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