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

Problem
(AFR) Time Constant
• Overvoltage trips when
accelerating, decelerating,
or during sudden speed or
load changes.
Torque Compensation
Primary Delay Time 2
• Poor motor torque and
Torque Compensation
speed response
• Motor hunting and
oscillation
Slip Compensation
• Poor speed response and
stability
Slip Compensation
• Poor speed precision
• Poor motor torque at low Frequency Voltage
speeds
• Poor speed response
• Motor instability at start Frequency Voltage
<1> Determined by o2-04 (Drive Model Selection)
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

Problem
<High speed side>
• Poor motor torque and ASR Proportional Gain 1
speed response (C5-01)
• Motor hunting and <Low speed side>
oscillation ASR Proportional Gain 2
(C5-03)
<High speed side>
• Poor motor torque and ASR Integral Time 1
speed response (C5-02)
• Motor hunting and <Low speed side>
oscillation ASR Integral Time 2
(C5-04)
YASKAWA ELECTRIC EZZ010928 FSDrive-MV1000 Instructions
Parameter No.
• If overvoltage trips occur, gradually increase this setting
by 50 ms.
Speed Feedback
• If response is slow, gradually reduce this setting by 10 ms.
Detection Control
Note: Ensure that n2-02 ≤ n2-03.When making
2(n2-03)
• 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
(C4-06)
• If motor torque and speed response are too slow, gradually
reduce this setting by 2 ms.
• If motor hunting and oscillation occur, gradually increase
Primary Delay this setting by 10 ms.
Note: Ensure that C4-02 ≤ C4-06.When making
Time(C4-02)
• If response is slow, gradually decrease the setting by 10
ms.
Primary Delay
• If speed is unstable, gradually increase the setting by 10
Time(C3-02)
ms.
• If speed is too slow, gradually increase the setting by 0.1
ms.
Gain (C3-01) • If speed is too fast, gradually decrease the setting by 0.1
ms.
• If motor torque and speed response are too slow, increase
Mid Output
the setting.
• If the motor exhibits excessive instability at start-up,
(E1-08)
reduce the setting.
Minimum Output
Note: When working with a relatively light
(E1-10)
Table 5.3 Parameters for Fine-Tuning the Performance in CLV
Parameter No.
• If motor torque and speed response are too slow,
gradually increase the setting by 5.
• If motor hunting and oscillation occur, decrease the
setting.
<1>
• If motor torque and speed response are too slow,
decrease the setting.
• If motor hunting and oscillation occur, increase the
setting.
<1>
5.2 Motor Performance Fine-Tuning
Corrective Action
adjustments to n2-03, increase the value
of C4-06 (Torque Compensation Primary
Delay Time 2) proportionally.
changing C4-06 (Torque Compensation
Primary Delay Time 2), increase the value
of n2-03 proportionally.
adjustments to C4-02, increase the AFR
time constant 1 (n2-02) proportionally.
load, increasing this value too much can
result in overtorque.
Corrective Action
Suggested
Default
Setting
750 to 2000
750 ms
ms
150 to 750
150 ms
ms
20 to 100
200 ms
ms
<1>
100 to 500
200 ms
ms
– 0.5 to 1.5
±1% of the
E1-08:
<1>
motor rated
E1-10:
<1>
voltage
Suggested
Default
Setting
10.00 to
20.00
50.00
0.300 to
0.500 s
1.000 s
111
5