User Manual

Configuring the Speed Loop
3-1
C
HAPTER
3
Configuring the Speed Loop
The WebPak 3000 drive can be configured as a speed regulator or as an armature
voltage regulator, depending on the value of
FEEDBACK SELECT
(P.200). In this chapter,
the phrase “speed loop” refers to either configuration unless otherwise noted.
The speed loop reference sets the speed that the speed loop tries to maintain. The
drive processes and scales the speed reference input for use by the speed loop.
The speed loop uses the selected reference value and attempts to keep the speed
feedback from the motor equal to the reference value. If the feedback is less than the
reference, the speed loop increases the motor speed by commanding more current to
the motor. If the reference is less than the feedback, the speed loop decreases the
motor speed by commanding less current to the motor.
The speed loop tries to minimize the amount of error between the speed reference
and the speed feedback. The speed and accuracy with which the speed loop
responds to reference or motor load changes is determined by the speed loop
parameters.
Configuring the speed loop includes setting up the following:
•
Speed loop reference
•
Speed reference ramp
•
Speed mode select
•
Speed feedback
•
Speed loop regulator with gain profiling
Use This Chapter for These Applications:
•
Constant Diameter Speed Regulator
•
Variable Diameter Speed Regulator
•
Constant Diameter Current Regulator
•
Variable Diameter Current Regulator
•
Constant Diameter Position Regulator
•
Variable Diameter Position Regulator
•
Constant Diameter Tension Regulator
•
Variable Diameter Tension Regulator
•
Generic