N4: Adv Open Loop Vector Tune - YASKAWA GA800 Programming Manual

1 : Enabled Only when Rotating FWD
2 : Enabled Only when Rotating REV
Note:
When n3-23 = 1, 2, the drive enables overexcitation only in the direction of motor rotation in which a regenerative load is applied. Increased
motor loss can decrease ov [Overvoltage] faults.
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n4: Adv Open Loop Vector Tune

The following explains how to make special adjustments for Advanced Open Loop Vector [A1-02 = 4].
• First, perform Rotational Auto-Tuning.
• Operation that fluctuates around zero speed cannot be carried out when there is a load. For applications of this sort,
set A1-02 = 3 [Open Loop Vector].
• The tolerance of regenerative torque at low speeds is diminished. If regenerative torque is required in the low speed
range, set A1-02 = 3.
• This cannot be used for elevators or similar applications. There is a risk that the load could slip.
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n4-60: Motoring Low Speed Comp Gain
No.
Name
(Hex.)
n4-60 Motoring Low Speed Comp
Gain
(1B80)
Note:
• To increase the torque precision in the motoring direction when you operate at low speeds, do Stationary Auto-Tuning for Line-to-Line
Resistance only, or increase the value of this parameter in 5% increments.
• If the output frequency changes when you operate at low speeds, do Stationary Auto-Tuning for Line-to-Line Resistance only. If it is not
better, increase this parameter in 10% increments. The recommended setting is 50% to 100%.
■
n4-61: Low Speed Comp Frequency Level
No.
Name
(Hex.)
n4-61 Low Speed Comp Frequency
Level
(1B81)
■
n4-62: Regen Low Speed Comp Gain
No.
Name
(Hex.)
n4-62 Regen Low Speed Comp
Gain
(1B82)
Note:
If you do not apply a regenerative load when you operate at low speeds, do stationary Auto-Tuning for Line-to-Line Resistance only. If this
does not make it better, increase the setting value in 5% increments. The recommended setting is 100% to 150%. If you set this parameter too
high, the drive will detect CF [Control Fault] at stop.
■
n4-63: Speed EstimateResponse@High Freq
No.
Name
(Hex.)
n4-63 Speed
EstimateResponse@High
(1B83)
Freq
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. If this does not make it better, decrease the setting value in
10.0 unit increments.
YASKAWA TOEPYAIGA8002B GA800 Drive Programming
V/f CL-V/f OLV CLV AOLV
Sets a compensation gain to improve the control qualities for motoring loads in the low speed range.
V/f CL-V/f OLV CLV AOLV
Sets a frequency at which the settings n4-60 [Motoring Low Speed Comp Gain] and n4-62 [Regen
Low Speed Comp Gain] are enabled. When the output frequency < n4-61, the drive adjusts the torque
to agree with the settings for n4-60 and n4-62. Usually it is not necessary to change this setting.
V/f CL-V/f OLV CLV AOLV
Sets a compensation gain to improve the control qualities for regenerative loads in the low speed
range.
V/f CL-V/f OLV CLV AOLV
Sets the responsiveness of the speed estimation in high speed ranges, where the output frequency is ≥
n4-67 [Estimate Gain Switchover Freq].
Description
OLV/PM AOLV/PM CLV/PM EZOLV OLV/PM
Description
OLV/PM AOLV/PM CLV/PM EZOLV OLV/PM
Description
OLV/PM AOLV/PM CLV/PM EZOLV OLV/PM
Description
OLV/PM AOLV/PM CLV/PM EZOLV OLV/PM
2.10 n: Special Adjustment
Default
(Range)
100.0%
(50.0 - 200.0%)
Default
(Range)
6.00 Hz
(0.50 - 12.00 Hz)
Default
(Range)
100.0
(50.0 - 500.0)
Default
(Range)
60.0
(0.1 - 300.0)
2
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