YASKAWA A1000 Series Technical Manual page 150

5.2 b: Application
b3-04: V/f Gain During Speed Search
■
During Speed Search, the output voltage calculated from the V/f pattern is multiplied with the value set in parameter b3-
04. Changing this setting can be useful in order to reduce the output current during Speed Search.
No.
b3-04
b3-05: Speed Search Delay Time
■
In cases where an output contactor is used between the drive and the motor, the contactor must be closed before Speed
Search can be performed. This parameter can be used to delay the Speed Search operation, giving the contactor enough
time to close completely.
No.
b3-05
b3-06: Output Current 1 During Speed Search
■
Sets the current injected to the motor at the beginning of Speed Estimation Speed Search as a factor of the motor rated
current set in E2-01 (E4-01 for motor 2). If the motor speed is relatively slow when the drive starts to perform Speed
Search after a long period of baseblock, it may be helpful to increase the setting value. The output current during Speed
Search is automatically limited by the drive rated current.
No.
b3-06
Note: If Speed Estimation is not working correctly even after adjusting b3-06, try using Current Detection Speed Search instead.
■ b3-10: Speed Search Detection Compensation Gain
This parameter sets the gain for the detected motor speed of the Speed Estimation Speed Search. The setting should be
increased only if an overvoltage fault occurs when the drive restarts the motor.
No.
b3-10
b3-14: Bi-Directional Speed Search Selection
■
Sets how the drive determines the motor rotation direction when performing Speed Estimation Speed Search.
No.
b3-14
Setting 0: Disabled
The drive uses the frequency reference to determine the direction of motor rotation in order to restart the motor.
Setting 1: Enabled
The drive detects the motor rotation direction in order to restart the motor.
b3-17: Speed Search Restart Current Level
■
A large current can flow into the drive if there is a fairly large difference between the estimated frequency and the actual
motor speed when performing Speed Estimation. This parameter sets the current level at which Speed Estimation is
restarted, thus avoiding overcurrent and overvoltage problems. Set as a percentage of the drive rated current.
No.
b3-17
150
Name
V/f Gain During Speed Search
Name
Speed Search Delay Time
Name
Output Current 1 during Speed Search
Name
Speed Search Detection Compensation Gain
Parameter Name
Bi-Directional Speed Search Selection
Name
Speed Search Restart Current Level
YASKAWA ELECTRIC SIEP C710616 27C YASKAWA AC Drive A1000 Technical Manual
Setting Range
10 to 100% Determined by o2-04
Setting Range
0.0 to 100.0 s
Setting Range
0.0 to 2.0 Determined by o2-04
Setting Range
1.00 to 1.20
Setting Range
0 or 1 Determined by A1-02
Setting Range
0 to 200%
Default
Default
0.2 s
Default
Default
1.05
Default
Default
150%