YASKAWA G7 Series Technical Manual page 108

Control
Method
Open-loop
vector
control
(A1-02 = 2)
Open-loop
vector
control 1
(A1-02 = 2)
-18
4
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Table 4.4 Adjusted User Parameters (Continued)
Name
Performance
(Parameter Number)
• Increasing torque
Speed feedback and speed response
detection control • Controlling hunting
(AFR) gain and vibration in mid-
(N2-01) dle-range speeds (10
to 40 Hz)
Torque • Increasing torque
compensation and speed response
primary delay time • Controlling hunting
constant (C4-02) and vibration
• Increasing speed
Slip compensation
response
primary delay time
• Improving speed
(C3-02)
stability
Slip compensation • Improving speed
gain (C3-01) accuracy
• Reducing motor
magnetic noise
Carrier frequency • Controlling hunting
selection (C6-02) and vibration at low
speeds (10Hz or
less)
Middle output
frequency voltage • Improving torque at
(E1-08) low speeds
Minimum output • Controlling shock at
frequency voltage startup
(E1-10)
Factory
Recommended
Setting Setting
• Reduce the setting if
torque or speed response is
slow.
1.00 0.50 to 2.00
• Increase the setting if
hunting or vibration
occurs.
• Reduce the setting if
torque or speed response is
20 to slow.
20ms
100ms • Increase the setting if
hunting or vibration
occurs.
• Reduce the setting if speed
100 to response is slow.
200ms
500ms • Increase the setting if the
speed is not stable.
• Increase the setting if
speed response is slow.
1.0 0.5 to 1.5
• Reduce the setting if the
speed is too fast.
• Increase the setting if
motor magnetic noise is
Depends
0 to high.
on
default • Reduce the setting if
capacity
hunting or vibration occurs
at low speeds.
Depends • Increase the setting if
Default to
on torque or speed response is
Default + 1 or
capacity slow.
*
and • Reduce the setting if shock
2 V
voltage at startup is large.
Adjustment Method