Chapter 12 Description of Parameter Settings|CFP2000 Series
12.1-10-2
If the switch point is too high, the active area of I/F will be too wide, which will generate larger
current and cannot save energy. (The reason is that if the current of Pr.10-31 sets too high, and
the high switch point will make the drive keeps outputting with the setting value of Pr.10-31).
Frequency Point when Switch from PM Sensorless Mode to I/F Mode
Factory Setting: 20.00
Settings 0.00~599.00Hz
The parameter is the switch point which is from high frequency to low 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 when the frequency of switch point is
running.
If the switch point is too high, the active area of I/F will be too wide, which will generate larger
current and cannot save energy. (The reason is that if the current of Pr.10-31 sets too high, and
the high switch point will make the drive keeps outputting with the setting value of Pr.10-31).
I/F mode, low pass-filter time
Factory Setting: 0.2
Settings 0.0~6.0 sec
This parameter is the filter time of Pr.10-31.It can let magnetic field under I/F mode increased
smoothly to the current command setting value.
If you want to increase the size of Id slowly, you can adjust high to avoid the starting current
output Step phenomenon; If you a
djust to low (minimum 0), the faster the current rises,
there will be a Step phenomenon.
Initial Angle Detection Pulse Value
Factory Setting: 1.0
Settings 0.0~3.0
The angle detection is fixed to 3: Use the pulse injection method to start. The parameter
influences the value of pulse during the angle detection. The larger the pulse is, the higher of
the accuracy of rotator’s position. But larger pulse might cause oc easily.
Increase the parameter when the running direction and the command are opposite while
start-up. If oc occurs in the start-up moment, then decrease the parameter.
Please refer to Chapter 12-2 Adjustment & Application for detailed motor adjustment procedure.
Zero voltage time while start up
Factory Setting: 00.000
Settings 00.000~60.000 sec
When the motor is in static status at the startup, the accuracy to estimate angles will be
increased. In order to make the motor in “static status”, the drive 3 phase U, V, W output 0V to
motor to reach this goal. The Pr.10-49 setting time is the length of time when three-phase output
0V.
It is possible that even when this parameter is being applied but the motor at the installation site
cannot go in to the “static status” caused by the inertia or by any external force. So, if the motor
doesn’t go into a completer “static status” in 0.2 sec, increase appropriately this setting value.
This parameter is functional only when the setting of Pr.07-12 Speed Search during Startup ≠0.
Injection Frequency
Factory Setting: 500
Settings 0~1200Hz
This parameter is a high frequency injection command in PM SVC control mode, and usually it
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