5.2 b: Application
YASKAWA ELECTRIC SIEP C710616 35D YASKAWA AC Drive E1000 Technical Manual 143
■ 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.
■
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.
■
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. 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.
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.
■
b3-14: Bi-Directional Speed Search Selection
Sets how the drive determines the motor rotation direction when performing Speed Estimation Speed Search.
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. Name Setting Range Default
b3-04 V/f Gain During Speed Search 10 to 100% Determined by o2-04
No. Name Setting Range Default
b3-05 Speed Search Delay Time 0.0 to 100.0 s 0.2 s
No. Name Setting Range Default
b3-06 Output Current 1 during Speed Search 0.0 to 2.0 Determined by o2-04
No. Name Setting Range Default
b3-10 Speed Search Detection Compensation Gain 1.00 to 1.20 1.05
No. Parameter Name Setting Range Default
b3-14 Bi-Directional Speed Search Selection 0 or 1 1
No. Name Setting Range Default
b3-17 Speed Search Restart Current Level 0 to 200% 150%
SIEP_C710616_35.book 143 ページ ２０１５年１１月３０日 月曜日 午後２時２分
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