"Inertia mismatch" means the difference of physical inertia between the motor and the load.
If electromechanical systems were rigidly coupled, with no compliance or “wind-up” in the system, performance would be determined by the motor torque, and inertia would be irrelevant. But since mechanical components aren’t infinitely rigid – belts stretch, gears have backlash, and couplings are elastic – designers must decide what inertia ratio is acceptable for each specific application.
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Before calculating your inertia ratio, you must first calculate your inertia of load reflected to the motor (JL below) by following the formula and variables below:
Once you calculate your inertia of load reflected to the motor (JL above and below), you can now calculate inertia ratio by following the following formula and variables:
If you have questions, please contact our experts today! Also - please use our inertia ratio calculator below for your application.