5.2 b: Application
164 YASKAWA ELECTRIC SIEP C710616 27G YASKAWA AC Drive A1000 Technical Manual
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.
Note: Available control mode for parameter b3-04 varies by drive model:
CIMR-A2A0004 to 2A0415 and 4A0002 to 4A0675: Available when A1-02 = 0
CIMR-A4A0930 and 4A1200: Available when A1-02 = 0, 2
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 (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.
Note: If Speed Estimation is not working correctly even after adjusting b3-06, try using Current Detection Speed Search instead.
b3-07: Output Current 2 during Speed Search (Speed Estimation Type)
Sets the amount of output current during Speed Estimation Speed Search as a coefficient for the no-load current. (output
current during Speed Search is automatically limited by the drive rated current). Increase this setting value in increments
of 0.1 if the drive fails to perform Speed Estimation.
Note: This parameter is available in models CIMR-A4A0930 and 4A1200.
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 to adjust
the responsiveness during a Speed Estimation Speed Search.
b3-09: Current Control Integral Time during Speed Search (Speed Estimation Type)
There is normally no need to change this parameter from the default value.
Sets the integral time for the current controller to
adjust the responsiveness during a Speed Estimation Speed Search.
No. Name Setting Range Default
b3-04 V/f Gain During Speed Search 10 to 100%
Determined by C6-01 and
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
b3-07 Output Current 2 during Speed Search (Speed Estimation Type) 0.0 to 5.0
Determined by C6-01 and
o2-04
No. Name Setting Range Default
b3-08 Current Control Gain during Speed Search (Speed Estimation Type) 0.00 to 6.00
A1-02 = 0 to 3: Determined
by o2-04
A1-02 = 5 or 6: 0.30
No. Name Setting Range Default
b3-09 Current Control Integral Time during Speed Search (Speed Estimation Type) 0.0 to 1000.0 ms
A1-02 = 0 to 3:
2.0 ms
A1-02 = 5 or 6: 4.0 ms
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