Characteristic curve for asynchronous drives

For spindle drives often asynchronous motors are used. With the acceleration depending on speed characteristic curve a=f(n) shown in following figure the user can realize an optimised adaptation to typical characteristic of such spindle drives.

Characteristic curve for asynchronous drives
Characteristic curve for asynchronous drives

In addition to maximal permissible acceleration a_max and speed N1 in constant range of acceleration curvature only setting to the speed N2 has to be done. Above speed value N1 the acceleration curve has a proportional characteristic to 1/n, above speed value N2 it is proportional to 1/n².