Open Loop Vector (Olv) Motor Control Method Tuning - YASKAWA V1000 Series Installation & Start-Up Manual

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Open Loop Vector (OLV) Motor Control Method Tuning

Table 5.2 Parameters for Tuning the Drive in OLV Motor Control Method
Problem
• Poor motor torque and speed
response
• Control motor hunting and
oscillation at speeds between
10 and 40 Hz.
• Poor motor torque and speed
response
• Control motor hunting and
oscillation at speeds between
10 and 40 Hz.
• Overvoltage trips when
accelerating, decelerating, or
during sudden speed or load
changes.
• Poor motor torque and speed
response
• Motor hunting and
oscillation.
• Overvoltage trips when
accelerating, decelerating, or
during sudden speed or load
changes
YASKAWA TM.V1000.01 V1000 Drive Installation & Start-Up Manual (Preliminary 01-19-07)
5.2 Motor Performance Fine Tuning
Parameter No.
• If motor torque and speed response are too
slow, gradually decrease the setting by
AFR Gain
0.05.
(n2-01)
• If motor hunting and oscillation occur,
gradually increase the setting by 0.05.
• To improve motor torque speed response,
gradually reduce this setting by
10 ms and check the performance.
• If motor hunting and oscillation occur as a
AFR Time result of load inertia, gradually increase
Constant 1 the setting by 50 ms and check the
performance. Note: Ensure that n2-02 ≤
(n2-02)
n2-03. When making adjustments to n2-
02, set C4-02 (Torque Compensation
Primary Delay Time Constant 1)
accordingly.
• If overvoltage trips occur, gradually
increase this setting by 50 ms.
• If response is slow, gradually reduce this
AFR Time
setting by 10 ms. Note: Ensure that n2-02
Constant 2
≤ n2-03. When making adjustments to n2-
(n2-03)
03, increase the value of
C4-06 (Torque Compensation Primary
Delay Time 2) proportionally.
• To improve motor torque speed response,
gradually reduce this setting by 2 ms and
Torque
check the performance.
Compensation
• If motor hunting and oscillation occur,
Primary Delay
gradually increase this setting by 10 ms.
Time Constant 1
Note: Ensure that C4-02 ≤ C4-06. When
(C4-02)
making adjustments to C4-02, increase n2-
02 (AFR Time Constant) proportionally.
• If overvoltage trips occur, gradually
increase this setting by 10 ms and check
the performance.
Torque
• If response is slow, gradually reduce this
Compensation
setting by 2 ms and check the
Primary Delay
performance. Note: Ensure that C4-02 ≤
Time Constant 2
C4-06. When changing C4-06 (Torque
(C4-06)
Compensation Primary Delay Time
constant 2), increase the value of n2-03
proportionally.
Countermeasure
Default Suggested
Value Setting
1.00 0.50 to 2.00
50 to 2000
50 ms
ms
5
750 to 2000
750 ms
ms
20 ms
20 to 100 ms
<1>
150 to 750
150 ms
ms
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