Inertia Matching
Match load inertia to motor rotor inertia.
Reflected load inertia
Load mass (kg)
Effective radius R (mm)
Speed ratio
Rotary inertia at load shaft (kg·m², optional)
Motor rotor inertia JM (kg·m²)
Limit JL/JM
3
5
10
20
Reflected load inertia JL
-
kg·m²
Total inertia at motor
-
kg·m²
Inertia ratio JL/JM
-
:1
–
Guidance: Japanese-brand drives commonly allow JL/JM up to ~10...
Component inertia (geometry)
Shape
Solid cylinder
Hollow cylinder
Disk
Rectangular plate
Mass (kg)
Outer radius (mm)
Inner radius (mm)
Side a (mm)
Side b (mm)
Component inertia J
Component inertia J
-
kg·m²
J = GD²/(4g)...