What is inertia?

2022-06-25 09:01

Inertia here refers to the degree of resistance of the coupling to changes in angular velocity and the tendency to maintain a uniform rotation under the action of external forces (such as torque). In a power transmission system, the inertia of the coupling is determined by the mass and its radial distribution, which is a performance index that determines the driving torque of the system. In addition to zero backlash and torsional stiffness, the selection of couplings for intermittent start-stop servo drives must also consider inertial factors. Sizing also requires the engineer to understand the inertia of the drive system and its effect on the coupling. Excessive coupling inertia will cause resonance, increase the fundamental frequency of the system, and seriously reduce the performance of the entire system. Low inertia couplings allow the system to be tuned to a high performance level, better suited for precision applications.

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