Direct Drive Motor - Load Mass Moment of Inertia Equation

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Direct Drive Motor - Load Mass Moment of Inertia Equation

Use this equation to determine the Mass Moment of Inertia of a direct drive system. The calculations assume there is no linkages and the all friction is exclusively within the load. 

Direct Drive Illustration
Direct Drive System

Equation:   

            Mass Moment of Inertia Equation

Where:

Jt =   System Inertia, lb-in.-sec2
Jl  Load Inertia, lb-in.-sec2
Jm Drive Motor Inertia, lb-in.-sec2