Parameter Details
11
11.10 n: Special Adjustment
YASKAWA ELECTRIC SIEP C710617 05F YASKAWA AC Drive GA700 Technical Manual 995
■ n4-64: Speed Estimate Response@Low Freq
No.
(Hex.)
Name Description
Default
(Range)
n4-64
(1B84)
Speed Estimate
Response@Low Freq
Sets the responsiveness of the speed estimation in low speed ranges, where
0 ≤ the output frequency, which is < n4-67 [Estimate Gain Switchover
Freq].
60.0
(0.1 - 150.0)
If better response of speed estimation is necessary, or if the motor oscillates, or if there is a large quantity of
torque ripple, increase the setting value in 10.0 unit increments.
Note:
Do rotational Auto-Tuning before you adjust n4-63 [Speed EstimateResponse@High Freq], n4-64, n4-65 [Flux Estimate
Response@High Freq], and n4-66 [Flux Estimate Response @Low Freq].
■ n4-65: Flux Estimate Response@High Freq
No.
(Hex.)
Name Description
Default
(Range)
n4-65
(1B85)
Flux Estimate
Response@High Freq
Sets the responsiveness of the magnetic flux estimation in high speed
ranges, where the output frequency is ≥ n4-67 [Estimate Gain Switchover
Freq]. Usually it is not necessary to change this setting.
0.90
(0.50 - 1.50)
If the drive detects oS [Overspeed] in no-load conditions, or if the speed does not become stable in the high speed
range, increase or decrease the setting value in 0.05 unit increments.
■ n4-66: Flux Estimate Response @Low Freq
No.
(Hex.)
Name Description
Default
(Range)
n4-66
(1B86)
Flux Estimate
Response @Low
Freq
Sets the responsiveness of the magnetic flux estimation in low speed ranges,
where 0 ≤ the output frequency, which is < n4-67 [Estimate Gain
Switchover Freq]. Usually it is not necessary to change this setting.
0.90
(0.50 - 1.50)
If the drive detects oS [Overspeed] in no-load conditions, or if the speed does not become stable in the low speed
range, increase or decrease the setting value in 0.05 unit increments.
■ n4-67: Estimate Gain Switchover Freq
No.
(Hex.)
Name Description
Default
(Range)
n4-67
(1B87)
Estimate Gain
Switchover Freq
Sets the switching frequency for estimation gain for these parameters:
n4-63 [Speed EstimateResponse@High Freq]
n4-64 [Speed Estimate Response@Low Freq]
n4-65 [Flux Estimate Response@High Freq]
n4-66 [Flux Estimate Response @Low Freq]
6.00 Hz
(0.00 - E1-04)
If the output frequency > n4-67, the drive will select n4-63 and n4-65. If the output frequency < n4-67, the drive
will select n4-64 and n4-66.
■ n4-68: Speed Estimation Filter Time
No.
(Hex.)
Name Description
Default
(Range)
n4-68
(1B88)
Speed Estimation
Filter Time
Sets the primary delay time constant for the speed estimation value. Usually
it is not necessary to change this setting.
0.001 s
(0.001 - 0.010 s)
If the motor speed oscillates in the high speed range, set the value to 0.010 s.
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