Chapter 12 Description of Parameter Settings|CFP2000 Series
12.1-10-1
10 Speed Feedback Control Parameters
This parameter can be set during operation.
In this parameter group, ASR is the abbreviation for Adjust Speed Regulator and PG is the
abbreviation for Pulse Generator.
~
Reserved
I/F Mode, current command
Factory Setting: 40
Settings 0~150% rated current of motor
The parameter is the current command of the drive in low-speed area (low-speed area:
frequency command < Pr.10-39). When it is stalling on heavy duty start-up or forward / reverse
with load,adjust the parameter (increase). If inrush current is too high to cause oc stall, then
decrease it.
PM Sensorless Observer Bandwidth for High Speed Zone
Factory Setting: 5.00
Settings 0.00~599.00Hz
The parameter is speed estimator bandwidth. Adjust the parameter will influence the stability
and the accuracy of speed for motor.
If there is low frequency vibrates (the waveform is similar to sin wave) during the process, then
increase the bandwidth. If there is high frequency vibrates (the waveform vibrates extremely
and is like spur), then decrease the bandwidth.
Reserved
PM Sensorless Observer Low-pass Filter Gain
Factory Setting: 1.00
Settings 0.00~655.35
Adjust the parameter will influence the response speed of speed estimator.
If there is low frequency vibrates (the waveform is similar to sin wave) during the process, then
increase the gain. If there is high frequency vibrates (the waveform vibrates extremely and is
like spur), then decrease the gain.
~
Reserved
Frequency Point when switch from I/F mode to PM Sensorless mode
Factory Setting: 20.00
Settings 0.00~599.00Hz
The parameter is the switch point which is from low frequency to high frequency.
If the switch point is too low, motor will not generate enough back EMF to let the speed
estimator measure the right position and speed of rotator, and cause stall and oc when the
frequency of switch point is running.
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