Planetary gearbox application program, the development of industrial equipment is relatively fast, servo motors are more common in industrial equipment, generally required in high-precision applications from high torque and precision and even high power high density, so that the speed of the increase are higher than 3000rpm, due to the speed of the increase also makes the servo motor power density increased significantly.
It means that whether the servo motor needs to be paired with a planetary gearbox to decelerate, the deciding factor is mainly from the application of technical requirements and cost considerations.
In the end, what kind of technical requirements must be matched with planetary gearboxes? The following science and technology, if incorrect or view the electricity of the welcome message correction.
1. In terms of cost considerations, in the cost point of view assumes that the 0.2KW servo motor with drive, it costs 1 unit of equipment cost, to 3KW servo motor with drive must cost 15 units of cost, if the use of 0.2KW servo motor and drive.
With a set of reducer will be able to achieve the aforementioned cost of 15 units to complete the technical parameters, the price fluctuations in operating costs to more than 50%. 2. In terms of performance considerations, it is understood that the improper matching of the planetary gearbox load inertia is one of the biggest reasons for the instability of the servo motor with planetary gearbox control. For large load inertia, you can use the inverse of the square of the reduction ratio to deploy the
equivalent load inertia to obtain the control response. From this point of view, the planetary gearbox for the servo application of the control response of the match.
3. In the application of equipment life considerations, planetary gearboxes can also effectively solve the decay of the low-speed control characteristics of the servo motor. The control characteristics of the servo motor will be reduced by the speed, which will lead to a certain degree of decay, and it is easy to see the stability of the signal pickup and current control at low speed.
This is easily seen in the stability of signal acquisition and current control at low speeds. Therefore, the use of reducer can make the motor have a high speed.
4. to enhance his output torque, planetary gearbox torque enhancement, may be used to directly increase the output torque of the servo motor way, this way must use expensive high-power servo motor, the motor also has a more powerful structure, the torque increase is proportional to the control of the motor.The increase in torque is proportional to the increase in control current, shall use a relatively large drive, power electronic components and related mechanical and electrical equipment specifications increase, and will make the cost of the control system increased significantly. Therefore, it should be used in accordance with the needs of the decision to use planetary gearbox. Generally speaking, in the operation of the machine has low speed, high torque and high power and other needs, the number is the use of planetary gearboxes.
5. To increase the efficiency of the use of equipment, theoretically enhance the power of the servo motor, is also the way to enhance the output torque, can increase the speed of the servo motor twice to make the power density of the servo motor system twice, and do not need to increase the drive and other control system components. The specifications of the control system components such as the driver need not be increased, that is, no additional cost. This requires a planetary gearbox and a servo motor to achieve the purpose of increasing torque. So then, the development of high power servo motor is necessary with the planetary gearbox, rather than ignoring it.
6. High-precision heavy load he, must do the load to move and require precision positioning when the need. General medical, satellite, aviation, military, wafer equipment, machine arm and other automation equipment. The common feature of this category is that the torque required to move the load often far exceeds the torque capacity of the servo motor
The torque required to move the load often far exceeds the torque capacity of the servo motor itself. And through the planetary gearbox to do the servo motor output torque boost, it can effectively solve this kind of problem.
Planetary gearbox principle and technology
The basic structure of a planetary gearbox consists of an input planetary sun wheel, a planetary wheel and a fixed inner gear ring. The working principle of the planetary reducer and the power is input from the motor end to the sun wheel, and the sun wheel will drive the planetary wheel which is kept on the planetary arm frame.
And the planetary wheel, in addition to rotating around its own axis, and driving the planetary arm frame around the center of the transmission system, will turn it.
The planetary gearbox has many advantages, such as precise structure, saving volume; coaxial input and output makes the design more flexible; light weight, high efficiency, no need to change lubricating oil, no need to replace parts, long life, etc. And it is using modular design, making the application easier.
These are also the characteristics of the planetary gearboxes produced by Demark for servo motors. It is no coincidence that all high-performance servomotor gearboxes are based on the planetary gearbox mechanism. The gears of planetary gearboxes use multiple tooth contacts to distribute the load.
The planetary gearhead has the highest torque density and rigidity for a given design space, and compared to general gearheads, the planetary gearhead has superior structural dynamic balance characteristics at high speeds and is easy to lubricate. Generally speaking, as long as the use of lubricating grease that is thus achieving the effect of adequate lubrication, the above-mentioned, servo motors with planetary gearheads are identified as the most suitable for use in most cases of corporate applications for servo applications.