Adjustment Suggestions - YASKAWA G7 Series Technical Manual

Adjustment Suggestions

If hunting, vibration, or other problems originating in the control system occur during trial operation,
adjust the parameters listed in the following table according to the control method. This table lists only the
most commonly used user parameters.
Control Name
Method (Parameter Number)
Hunting-prevention
gain (N1-02)
Carrier frequency
selection
(C6-02)
V/f control Torque
(A1-02 = 0 compensation
or 1) primary delay time
constant (C4-02)
Torque
compensation gain
(C4-01)
Middle output
frequency voltage
(E1-08)
Minimum output
frequency voltage
(E1-10)
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Table 4.4 Adjusted User Parameters
Factory
Performance
Setting
Controlling hunting
and vibration in
1.00
middle-range speeds
(10 to 40 Hz)
• Reducing motor
magnetic noise Depends
• Controlling hunting on
and vibration at low capacity
speeds
• Increasing torque
Depends
and speed response
on
• Controlling hunting
capacity
and vibration
• Improving torque at
low speeds (10 Hz
or lower) 1.00
• Controlling hunting
and vibration
Depends
• Improving torque at
on
low speeds
capacity
• Controlling shock at
and
startup
voltage
Adjustment Suggestions
Recommended
Adjustment Method
Setting
• Reduce the setting if
torque is insufficient for
heavy loads.
0.50 to 2.00
• Increase the setting if
hunting or vibration occurs
for light loads.
• Increase the setting if
motor magnetic noise is
high.
0 to
• Reduce the setting if
default
hunting or vibration occurs
at low to middle-range
speeds.
• Reduce the setting if
torque or speed response is
slow.
200 to 1000ms
• Increase the setting if
hunting or vibration
occurs.
• Increase the setting if
torque is insufficient at
low speeds.
0.50 to 1.50
• Reduce the setting if
hunting or vibration occurs
for light loads.
• Increase the setting if
Default to
torque is insufficient at
Default + 3 to
low speeds.
*
• Reduce the setting if shock
5 V
at startup is large.
17
4-