Permitted starting frequency of the motor

You can determine the permitted switching frequency ZMof the motor in cycles/per hour by using the following formula:

ZM = Z0× KJ× KM× KP

When using the additional flywheel mass/Z option, you must multiply the no-load starting frequency Z0 by the factor 0.8.

You can determine the factors KJ, KM, and KP using the following diagrams:

Factor KJ depending on the additional mass moment of inertia

Factor KM depending on the external load during run-up

Factor KP depending on the static power and the relative cyclic duration factor CDF

JL

Total of all mass moments of inertia on the load end in relation to the motor axis

JG

Mass moment of inertia of gear unit

JZ

Mass moment of inertia flywheel fan

JM

Mass moment of inertia of motor

ML

Counter-torque during run-up

MH

Acceleration torque of the motor

Pstat

Power demand after run-up (static power)

PN

Rated motor power

%cdf

Relative cyclic duration factor

Additional information