#Product Trends
What Is Moment of Inertia?
Calculation Formulas and Selection Criteria for Motor Design
Moment of inertia is a physical quantity that indicates how easily a rotating object can be set in motion or brought to a stop, and it is an essential factor in motor design calculations. During motor selection, it is necessary to correctly calculate the load’s moment of inertia and estimate the required torque and acceleration/deceleration performance.
If the moment of inertia is estimated incorrectly, depending on the motor type and operating conditions, this can lead to overshoot or undershoot during startup and stopping, control instability, or even operational failure.
In this article, we will explain step-by-step everything from the basic definition of moment of inertia and its relationship to torque, to calculation formulas for typical motor configurations, and key points to consider during motor selection. We hope this serves as a useful reference for engineers involved in motor design and equipment development.
