Open Loop Vector (Olv) Motor Control Method Tuning; Parameters For Tuning The Drive In Olv Motor Control Method - YASKAWA V1000 Series Installation & Start-Up Manual

5.2 Motor Performance Fine Tuning
<1> Default settings change when the Control Method is changed (A1-02) or a different V/f pattern is selected using
parmaeter E1-03. The default setting shown is for V/f Control.
Note: Use slip compensation to improve speed precision in V/f Control. First make sure that the proper
values have been set for the motor rated current to E2-01, motor rated slip (E2-02), and motor
no-load current (E2-03). Next, adjust the slip compensation gain set to C3-01 so that it is
between 0.5 to 1.5.
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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.
178
Parameter No.
AFR Gain
(n2-01)
AFR Time
Constant 1
(n2-02)
AFR Time
Constant 2
(n2-03)
Torque
Compensation
Primary Delay
Time Constant 1
(C4-02)
YASKAWA ELECTRIC TOEP C710606 09B YASKAWA AC Drive V1000 Installation & Start-Up Manual
Countermeasure
• If motor torque and speed response are too
slow, gradually decrease the setting by
0.05.
• 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
result of load inertia, gradually increase
the setting by 50 ms and check the
performance. Note: Ensure that 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
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.
• To improve motor torque speed response,
gradually reduce this setting by 2 ms and
check the performance.
• 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 n2-
02 (AFR Time Constant) proportionally.
Default Suggeste
Value d Setting
1.00 0.50 to 2.00
50 to 2000
50 ms
ms
750 to 2000
750 ms
ms
20 ms 20 to 100
ms
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