The best application of servomotors and planetary speed reducers is that the development of industrial equipment is relatively fast. Servo motors are common in industrial equipment. In general, high-speed applications require high torque, precision, and even high power. With high density, the speed increase is higher than 3000 rpm. Due to the increase in speed, the servo motor power density is also greatly increased. It means that the servo motor needs to be decelerated with a planetary reducer, and the decisive factor is mainly the consideration of the technical requirements and the cost of the application.
What kind of technology needs must be equipped with a planetary speed reducer? The following popular science, if there are incorrect or opinions welcome message correction.
1, consider the cost, in the cost point of view assuming 0.2KW servo motor supporting driver, need to spend 1 unit equipment cost, with 3KW servo motor supporting driver must cost 15 units cost, if using 0.2KW servo motor and driver,
With a set of speed reducers, it is possible to achieve the above-mentioned technical parameters that cost 15 units to complete, and the price floats above 50% on the operating costs.
2. Considered in terms of performance, it is understood that the improper matching of the load inertia of the planetary reducer is one of the biggest reasons for servo motor control with planetary reducer instability. For large load inertia, the inverse ratio of the reduction ratio can be used to match the best
The equivalent load inertia for the best control response. From this point of view, planetary reducers are the best match for the servo control response.
3, in the application of equipment life, planetary reducer can also effectively solve the servo motor low speed control characteristics of the attenuation. The controllability of the servo motor will be reduced due to the speed, resulting in a certain degree of attenuation, signal acquisition and current control stability at low speeds
It is easy to see in sex. Therefore, using a speed reducer can make the motor have a higher speed.
4, to increase his output torque, planetary reducer torque boost method, may use direct increase in the output torque of the servo motor, this method must use expensive and powerful servo motor, the motor must have a more robust structure,
The increase in torque is proportional to the increase in control current and the use of relatively large actuators. The increase in the size of power electronic components and associated electromechanical equipment will increase the cost of the control system. Therefore, the use of planetary gearboxes should be decided according to the needs of use. In general
In the operation of the machine, there is a demand for low speed, high torque and high power. The absolute numbers are all planetary reducers.
5, increase the efficiency of the use of equipment, in theory, to increase the power of the servo motor is also a way to increase the output torque, it can increase the speed of the servo motor twice to make the power density of the servo motor system double, and do not need to increase the drive Control system
The specifications of the components, that is, do not require additional costs. This requires the combination of a planetary speed reducer and servo motor to achieve the purpose of increasing the torque. Therefore, the development of high-power servo motors must be matched with planetary reducers rather than neglecting him.
6. The need for high-precision heavy loads, which must be done when the load is moved and precise positioning is required. General medical, satellite, aviation, military, wafer equipment, robotic arms and other automation equipment. The common feature of this type is that the torque required to move the load often far exceeds the servo motor
Its own torque capacity. The increase in servo motor output torque through the planetary reducer effectively solves this problem.
Planetary reducer principle and technology
As for the planetary speed reducer, the basic structure consists of an input planetary sun gear, planetary gears and a fixed internal gear ring. The working principle and power of the planetary gear reducer are input from the motor end to the sun gear, and the sun gear will drive the planet wheels held on the planet arm.
Instead of spinning around its own axis, the planetary gear drives the planet arm around the center of the drive train and rotates it.
Planetary reducer has many advantages, such as precision structure, can save the volume; coaxial input and output to make the design more flexible; light weight, high efficiency, no need to replace the oil, no replacement parts, long life, etc. and is used Modular design makes application easier.
Demag's servomotor planetary gearboxes also have the above characteristics. In terms of the case, it is not accidental that all planetary gearboxes are used in all gearboxes used in high-performance servo motors. Planetary reducer gears use multi-tooth contact to distribute the load,
Therefore, in the given design space, it has the largest torque density and rigidity, and compared with the general reducer, the planetary gear reducer has superior structural dynamic balance characteristics at high speed and is easy to be lubricated. In general, as long as the use of grease
In order to achieve the effect of full lubrication, the above-mentioned planetary gear reducer with a servo motor has been recognized as the most suitable servo application solution in most cases applied by enterprises.
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