Application of Servo Motor and Planetary Reducer in Welding Equipment

In the application of modern industrial equipment in high-precision applications, with the development of servo motor technology, from high torque density to high power density, the speed is increased by more than 3000 rpm. Because of the increase in speed, the power density of the servo motor is greatly increased. This means that whether the servo motor needs to be equipped with a reducer is mainly determined by the application demand and cost considerations.

However, in what applications must servo planetary gear reducers be used?

1. Heavy burden and high precision: This is required when the load must be moved and precise positioning is required. It is generally like # #, # #, medical, wafer equipment, robots and other automation equipment. Their common feature is that the torque required to move the load often far exceeds the torque capacity of the servo motor itself. This problem can be effectively solved by increasing the output torque of the servo motor through the reducer.

2. Lifting torque.

3. Increase the use efficiency: In theory, increasing the power of the servo motor is also a way to increase the output torque. The power density of the servo system can be doubled by increasing the speed of the servo motor by twice, and there is no need to increase the specifications of the control system components such as the driver, that is, there is no need to increase additional costs. This requires the combination of planetary reducer to achieve the purpose of lifting torque. Therefore, the development of high-power servo motor must be matched with the application of reducer, rather than omitting it.

4. Improve performance: It is understood that improper matching of load inertia is one of the major reasons for unstable servo control. For large load inertia, the inverse square ratio of the deceleration ratio can be used to adjust a better equivalent load inertia to obtain a better control response. From this point of view, the planetary reducer is a good match for the control response of servo applications.

5. Increase the service life of the equipment: the planetary reducer can also effectively solve the attenuation of the low-speed control characteristics of the motor. Because the controllability of the servo motor will be attenuated to some extent due to the reduction of speed, it is particularly easy to see the stability of signal acquisition and current control at low speed. Therefore, the reducer can make the motor have a higher speed.

6. Reduce equipment cost: From the cost point of view, suppose that a 0.4KW AC servo motor with a driver costs one unit of equipment cost, and a 5KW AC servo motor with a driver must cost 15 units. However, if a 0.4KW servo motor and driver are used, and a group of reducers are used, the above 15 unit costs can be achieved, saving more than 50% in operating costs.

Therefore, the user decides to select the planetary gear reducer according to their different processing needs. Generally speaking, there are demands for low speed, high torque and high power density in machine operation, and most of them adopt planetary gear reducer.