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  • 1月 6, 2021
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Planetary gearbox inertia:
The rotation inertia of the planetary gearbox depends on whether your motor can control it when it starts and stops, i.e. whether it is stable when it starts and stops. Planetary gearboxes can enlarge the rotational inertia of a servo motor into a squarex of the deceleration speed ratio, such as a 1-to-10 gearbox, and the inertia can be magnified 100 times.
Inertial match:
Planetary gearboxes have rotational inertia, which is a very important parameter of planetary gearboxes, and in many cases we find that according to this formula, the speed and torque are in line, but the planetary gearbox of our choice will still have problems, and we need to pay attention to this rotational inertia.
For different structures, there are different inertia formulas, which I’ll give slowly later (including the speed, torque mentioned above). The main point here is that when the load rotation inertia is calculated on the motor shaft, it is the inverse number of times the transmission ratio square, i.e. 1/i squared.
In solving the problem, we can first simplify the complex problem, then find one or two entry points from it, use the existing theoretical formula to derive the results, and then compare, discuss, explore the accuracy of the selected degree, reliability, the basis of the assignment of parameters, list other interference factors, eliminate secondary factors, draw conclusions.
Add the reliability of boundary condition verification conclusions, here we do not consider the differences between ordinary three-phase asynchronous motors, variable frequency motors, servo reducers, DC motors, etc.
In short, we’re applying limited planetary deceleration patterns to a wider space, and it seems that as long as we have different speed ratios, then it’s obviously an illusion that just one planetary gearbox can do all the work, because our planetary gearbox has a more important power rating parameter, and that’s where we’re going to start talking about it.
Matches the load inertia:
In general, the inertia of servo motor is small, in general, the inertia converted into servo motor itself can not exceed 4 times the inertia of servo motor itself (different brands of servo motor design has very specific data), but there are many loads in practical applications, if the inertia and servo motor acceptable inertia difference is too large, it will greatly reduce the response speed of servo motor, thereby affecting production efficiency and increasing dynamic error. Accurate planetary gearboxes can play a key role in inertia matching.

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