YASKAWA U1000 Series Technical Manual page 196

5.2 b: Application
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 (Speed Estimation Type)
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 2 instead.
b3-08: Current Control Gain during Speed Search (Speed Estimation Type)
■
There is normally no need to change this parameter from the default value.
Sets the proportional gain for the current controller during Speed Search.
No.
b3-08
b3-10: Speed Search Detection Compensation Gain (Speed Estimation Type)
■
This parameter sets the gain for the detected motor speed of the Speed Estimation Speed Search. There is normally no
need to change this parameter from the default value. If acceleration occurs when restarting, set the parameter as close to
1.00 as possible.
No.
b3-10 Speed Search Detection Compensation Gain (Speed Estimation Type)
b3-14: Bi-Directional Speed Search Selection (Speed Estimation Type, Speed Estimation 2
■
Type, Current Detection 3 Type)
Sets how the drive determines the motor rotation direction when performing Speed Estimation Speed Search, Speed
Estimation Speed Search 2, or Current Detection Speed Search 3.
Disable this parameter when b3-50 is 0.1 or longer.
No.
Bi-Directional Speed Search Selection (Speed Estimation Type, Speed Estimation 2 Type,
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 (Speed Estimation Type)
■
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
196
Name
Speed Search Delay Time
Name
Output Current 1 during Speed Search (Speed Estimation Type)
Name
Current Control Gain during Speed Search (Speed Estimation Type)
Name
Parameter Name
Current Detection 3 Type)
Name
Speed Search Restart Current Level (Speed Estimation Type)
Setting Range
0.0 to 100.0 s
Setting Range
Setting Range
Setting Range
Setting Range
Setting Range
YASKAWA ELECTRIC SIEP C710636 02B YASKAWA U1000 Technical Manual
Default
Default
0.0 to 2.0 Determined by o2-04
Default
A1-02 = 0 to 3: Determined
0.00 to 6.00 by o2-04
A1-02 = 5 or 6: 0.30
Default
1.00 to 1.20
Default
0 or 1 Determined by A1-02
Default
0 to 200%
0.2 s
1.05
150%