ANSI/AGMA 6009-A00 pdf free.Standard. for Gearmotor, Shaft Mounted and Screw Conveyor Drives.
Normally, in designing a gear drive which may be used in a variety of applications, a manufacturer cannot anticipate what magnitude of Inertlas wIN be incorporated into the final system application. When sizing a gear drive for an application, the effects of system inertia should be considered to ensure adequate performance of the gear drive.
Both motor and driven equipment inertias must be considered when performing an analysis and should be considered during acceleration and deceleration.
4.5.1 Large motor Inertia – small driven Inertia
In starling, most of the toique generated by the electric field of the motor m used to accelerate the motor rotor which results in relatively low torque loads on the gear drive.
Sudden stops of the driven Inertia result In high shock loads on the gear drive due to the rapid deceleration of the large motor inertia.
4.5.2 Small motor Inertia – large drIven InertIa
In starting, most of the torque generated by a motor with high starling torque characteristics, passes through the gear drive to accelerate the driven equipment, resulting in high loads on the gear drive.
Sudden stops result in high loads on the driven equipment. There is a lesser effect passed through the gear drive due to the relatively low motor inertia.
4.5.3 Other Inertia considerations
When designing a system, if these effects are considered in the early stages, it may be possible to tune the system to accommodate likely operating conditions. For example, If a system Is to be started frequently, It may be possible to select a motor with high inertia, or if a system is expected to encounter frequent jams, a small motor inertia may be pre. ferred. Other considerations may be to include a flywheel in the system, increase the service factor or soften the system with various types of couplings or V-belts. When a brake is used to decelerate a
motor, the torques are similar to those that oCcur during starting. See 9.2.1.
4.6 Additional application and design conslderations For additional application and design considerations such as metallurgy, residual stress and manufacturing tolerances, refer to ANSI/AGMA 2001 -C95. ANSI/AGMA 6009 pdf free download.