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What kind of field is suitable for planetary reducer

Time:2020-10-31    Edit by ZhuoChuang

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 increase in speed is higher than 3000 rpm. Due to 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 from the application requirements and cost considerations. However, what kind of applications must be matched with a servo planetary gear reducer?


1. Heavy load and high precision: This is required when the load must be moved and precise positioning is required. Generally, such as aviation, satellite, medical, military technology, 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 a reducer.

2. Increasing torque: The method of increasing the output torque may be to directly increase the output torque of the servo motor, but this method not only requires the use of an expensive and high-power servo motor, the motor must have a stronger structure, and the increase in torque is positive Compared with the increase in the control current, the use of a relatively large driver at this time, the increase in the specifications of power electronic components and related electromechanical equipment, will also greatly increase the cost of the control system.

3. Increase 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 increased twice by increasing the speed of the servo motor twice, and there is no need to increase the drive and other control systems The specifications of the components, that is, no additional cost is required. This requires the use of planetary reducers to achieve the purpose of increasing torque. Therefore, the development of high-power servo motors must be combined with the use of reducers, rather than omitted.

4. Improve performance: It is understood that improper matching of load inertia is one of the biggest reasons for the instability of servo control. For large load inertia, the inverse square of the reduction ratio can be used to adjust the best equivalent load inertia to obtain the best control response. So from this perspective, planetary gearboxes are the best 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 motor's low-speed control characteristics. The controllability of the servo motor will cause a certain degree of attenuation due to the decrease in speed, especially in the stability of signal acquisition and current control at low speed, which is especially easy to see. Therefore, the use of a reducer can make the motor have a higher speed.

6. Reduce equipment cost: From a cost point of view, assuming that a 0.4KW AC servo motor is used with a driver, it will cost one unit of equipment cost, and a 5KW AC servo motor with a driver must cost 15 units of cost, but if a 0.4KW servo motor and driver are used , With a set of reducers, the aforementioned 15 unit cost can be achieved, saving more than 50% in operating costs.

Therefore, users decide which planetary gear reducer products to choose according to their different processing requirements. Generally speaking, there are occasions requiring low speed, high torque, and high power density in machine operation, and most of them use planetary gear reducers. Principle and technology of planetary gear reducer As for planetary gear reducer, the basic structure is composed of input sun gear, planet gear, output planet arm carrier, and fixed inner gear ring.

The working principle of the planetary gear reducer, the power is input from the motor end to the sun gear, and the sun gear will drive the planet gear held on the planetary arm carrier, and the planetary gear will rotate around its own axis and drive the planetary arm carrier around The center of the transmission system turns him.