GEH-6385 Reference and Troubleshooting, 2300 V Dr ives Chapter 4 Wizards
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Speed Regulator Tuneup

Speed Regulator Tu neup: Model

The simplified model of the speed r egulator is:
Speed
Feedback
Speed
Command
Σ
ΣΣ
Σ
+
-
Σ
ΣΣ
Σ
+
-
integral
gain
proportional
filter
proportional
command gain
proportional
feedback gain
Σ
ΣΣ
Σ
+
+
Integrator
system
inertia
2
π
ππ
π
60
net
gain
Filter
Torque
Command
The system inertia can be ei ther measured or entered and th e gains can be entered
separately or calculated from bandwidth, damping and stiffness for a 1st and 2nd order
closed loop r esponse.

Speed Regulator Tu neup: System Inertia

System inertia can be eith er measured by rotating the mot or and watching the
acceleration produced by a constant torque or entered b y the user.
Note The last measured/entered value is the default for entering a new value.

Speed Regulator Tu neup: Inertia Measurement

Command

This will perform the system inertia measurement by rotating the motor and
watching the accelerat ion produced by a constant torqu e. A dialog box will appear to
show the progr ess of the measur ements.
Use of the Abort function will cancel the measurements and throw presen t results
away.
Advanced Help: (privilege level 4 r equired)
• If error “Problem With T orque for Rampup Test” occurs set At _MeasJ_Spd to
90% of the speed, in RPM, reached during test.
• If error “CoastDown Tes t Finished Prematurely” occur s set At_MeasJ_Spd to a
value, in RPM, that would r equire the motor 1 sec to coast down.