Chapter 12 Description of Parameter Settings|CFP2000 Series
12.2-00-4
4. Set up speed control mode: Pr00-10=0, Pr00-11=2 SVC.
5. It is suggested that cutting off the power after finishing tuning, and then re-power on.
6. The ration of PMSVC control mode is 1:20.
7. When PMSVC control mode is under 1/20 rated speed, load bearing capacity=100% motor
rated torque.
8. PMSVC control mode is not applicable for zero speed control.
9. Start-up with load and forward/reverse load bearing capacity of PMSVC control mode=100%
rated torque of motor.
10. Set up the speed estimators related parameters
I/F Mode Current Command / Low-speed Current Command under PMSVC
Control
Factory Setting:40
Settings 0~150% of motor’s rated current
The parameter is the current command of the drive in low-speed area (low-speed area:
frequency command < Pr10-39).
When it is stalling on heavy duty start-up or forward/reverse with load, adjust the
parameter (to increase it). If inrush current too higher to cause oc stall, then decrease it.
PM FOC Sensorless Speed Estimator Bandwidth
Factory Setting:5.00
Settings 0.00~600.00Hz
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 sine 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.
PM Sensorless Observer Low-pass Filter Gain
Factory Setting:1.00
Settings 0.00~655.35
Adjust the parameter will influence the speed estimator’s speed of response.
If there is low frequency vibrates (the waveform is similar to sine 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.
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. It will
influence high/low frequency area of speed observer.
If the switch point is too low, motor will generate not enough back emf to let the speed
estimator measure the right rotator’s position and speed, and cause stall and oc when
the frequency of switch point is running.
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