YASKAWA FSDrive-MV1000 - Fine-Tuning Closed Loop Vector Control

5.2 Motor Performance Fine-Tuning
YASKAWA ELECTRIC EZZ010928 FSDrive-MV1000 Instructions 111
Troubleshooting
5
When using the Open Loop Vector Control, leave the torque compensation gain (C4-01) at its default setting of 1.00.
In the Open Loop Vector Control, when the speed precision is not improved for regenerative operation, enable slip
compensation during regeneration by setting parameter C3-04 = 1.
◆ Fine-Tuning Closed Loop Vector Control
Table 5.3 Parameters for Fine-Tuning the Performance in CLV
• Overvoltage trips when
accelerating, decelerating,
or during sudden speed or
load changes.
Speed Feedback
Detection Control
(AFR) Time Constant
2(n2-03)
• If overvoltage trips occur, gradually increase this setting
by 50 ms.
• If response is slow, gradually reduce this setting by 10 ms.
Note: Ensure that n2-02 ≤ n2-03.When making
adjustments to n2-03, increase the value
of C4-06 (Torque Compensation Primary
Delay Time 2) proportionally.
750 ms
750 to 2000
ms
Torque Compensation
Primary Delay Time 2
(C4-06)
• If overvoltage trips occur, gradually increase this setting
by 10 ms and check the performance.
• If response is slow, gradually reduce this setting by 2 ms
and check the performance.
Note: Ensure that C4-02 ≤ C4-06.When
changing C4-06 (Torque Compensation
Primary Delay Time 2), increase the value
of n2-03 proportionally.
150 ms
150 to 750
ms
• Poor motor torque and
speed response
• Motor hunting and
oscillation
Torque Compensation
Primary Delay
Time(C4-02)
• If motor torque and speed response are too slow, gradually
reduce this setting by 2 ms.
• If motor hunting and oscillation occur, gradually increase
this setting by 10 ms.
Note: Ensure that C4-02 ≤ C4-06.When making
adjustments to C4-02, increase the AFR
time constant 1 (n2-02) proportionally.
200 ms
20 to 100
ms
<1>
• Poor speed response and
stability
Slip Compensation
Primary Delay
Time(C3-02)
• If response is slow, gradually decrease the setting by 10
ms.
• If speed is unstable, gradually increase the setting by 10
ms.
200 ms
100 to 500
ms
• Poor speed precision
Slip Compensation
Gain (C3-01)
• If speed is too slow, gradually increase the setting by 0.1
ms.
• If speed is too fast, gradually decrease the setting by 0.1
ms.
– 0.5 to 1.5
• Poor motor torque at low
speeds
• Poor speed response
• Motor instability at start
Mid Output
Frequency Voltage
(E1-08)
Minimum Output
Frequency Voltage
(E1-10)
• If motor torque and speed response are too slow, increase
the setting.
• If the motor exhibits excessive instability at start-up,
reduce the setting.
Note: When working with a relatively light
load, increasing this value too much can
result in overtorque.
E1-08:
<1>
E1-10: <1>
±1% of the
motor rated
voltage
<1> Determined by o2-04 (Drive Model Selection)
Problem Parameter No. Corrective Action Default
Suggested
Setting
• Poor motor torque and
speed response
• Motor hunting and
oscillation
<High speed side>
ASR Proportional Gain 1
(C5-01)
<Low speed side>
ASR Proportional Gain 2
(C5-03)
<1>
• If motor torque and speed response are too slow,
gradually increase the setting by 5.
• If motor hunting and oscillation occur, decrease the
setting.
20.00
10.00 to
50.00
• Poor motor torque and
speed response
• Motor hunting and
oscillation
<High speed side>
ASR Integral Time 1
(C5-02)
<Low speed side>
ASR Integral Time 2
(C5-04)
<1>
• If motor torque and speed response are too slow,
decrease the setting.
• If motor hunting and oscillation occur, increase the
setting.
0.500 s
0.300 to
1.000 s
Problem Parameter No. Corrective Action Default
Suggested
Setting