GE General Electric Computer Accessories 2300 V User Manual

Page of 266
GEH-6385  Reference and Troubleshooting, 2300 V Drives
Chapter 4  Wizards  
••••
  4-39
Speed Regulator Tuneup
Speed Regulator Tuneup: Model
The simplified model of the speed regulator is:
Speed
Feedback
Speed
Command
ΣΣΣΣ
+
-
ΣΣΣΣ
+
-
integral
gain
proportional
filter
proportional
command gain
proportional
feedback gain
ΣΣΣΣ
+
+
Integrator
system
inertia
2
ππππ
60
net
gain
Filter
Torque
Command
The system inertia can be either measured or entered and the gains can be entered
separately or calculated from bandwidth, damping and stiffness for a 1
st
 and 2
nd
 order
closed loop response.
Speed Regulator Tuneup: System Inertia
System inertia can be either measured by rotating the motor and watching the
acceleration produced by a constant torque or entered by the user.
Note The last measured/entered value is the default for entering a new value.
Speed Regulator Tuneup: Inertia Measurement
Command
This will perform the system inertia measurement by rotating the motor and
watching the acceleration produced by a constant torque. A dialog box will appear to
show the progress of the measurements.
Use of the Abort function will cancel the measurements and throw present results
away.
Advanced Help: (privilege level 4 required)
  If error “Problem With Torque for Rampup Test” occurs set At_MeasJ_Spd to
90% of the speed, in RPM, reached during test.
  If error “CoastDown Test Finished Prematurely” occurs set At_MeasJ_Spd to a
value, in RPM, that would require the motor 1 sec to coast down.