N4: Adv Vect Tune - YASKAWA GA700 Technical Manual

◆

n4: Adv Vect Tune

The following explains how to make special adjustments for Advanced OpenLoop Vector Control [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 Control].
• 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.
■
n4-60: Motoring Low Speed Comp Gain
No.
Name
(Hex.)
n4-60 Motoring Low Speed
Comp Gain
(1B80)
Note:
• To improve torque accuracy in the motoring direction when running at low speeds, either perform only Stationary Auto-Tuning for
Line-to-Line Resistance, or increase the value of n4-60 in 5% increments. The suggested setting is 100% to 120%.
• If the output frequency fluctuates when running at low speeds, stationary Auto-Tuning for Line-to-Line Resistance only should be
performed. If there is no improvement, increase n4-60 in increments of 10%. The suggested 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 no regenerative load is applied when running at low speeds, stationary Auto-Tuning for Line-to-Line Resistance only should be
performed. If there is no improvement, increase n4-62 in increments of 5%. The suggested setting is 100% to 150%. If set extremely
high, CF [Control Fault] may be detected at the time of stop.
■
n4-63: SpdEstimationResponseForHighFreq
No.
Name
(Hex.)
n4-63 SpdEstimationRes
ponseForHighFreq
(1B83)
When an improvement in the response of speed estimation is desired, or when the motor speed oscillates, or when
there is a significant amount of torque ripple, increase the setting value in 10.0 increments. If no improvement is
obtained, reduce the setting value in 10.0 increments.
Note:
Before adjusting n4-63, n4-64 [SpdEstimationResponse forLowFreq], n4-65 [FluxEstimationResponseForHighFrq], n4-66
[FluxEstimationResponseForLowFreq], carry out rotational Auto-Tuning.
YASKAWA ELECTRIC SIEP C710617 01B YASKAWA AC Drive GA700 Technical Manual
V/f CL-V/f OLV CLV AOLV
This compensation gain improves the control characteristics for motoring
loads in the low speed range.
V/f CL-V/f OLV CLV AOLV
Set a frequency that enables the settings for n4-60 [Motoring Low Speed
Comp Gain], n4-62 [Low Speed compensation Gain]. When the output
frequency < n4-61, torque compensation is carried out in accordance with
the settings for n4-60, n4-62. Normally there is no need to change this
setting.
V/f CL-V/f OLV CLV AOLV
This compensation gain improves the control characteristics for
regenerative loads in the low speed range.
V/f CL-V/f OLV CLV AOLV
In high speed ranges, where the output frequency is ≥ n4-67 [SwitchingFreq
forEstimation gain], this adjusts the responsiveness of the speed estimation.
11.10 n: Special Adjustment
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
Default
(Range)
100.0%
(50.0 - 200.0%)
Default Setting
(Range)
6.00 Hz
(0.50 - 12.00 Hz)
Default Setting
(Range)
100.0%
(50.0 - 200.0%)
Default Setting
(Range)
60.0
(0.1 - 150.0)
11
881