188 YASKAWA TM.V1000.01 V1000 Drive Installation & Start-Up Manual (Preliminary 01-19-07)
5.2 Motor Performance Fine Tuning
5.2 Motor Performance Fine Tuning
This section offers helpful information for counteracting oscillation, hunting, or
other faults that occur while performing a trial run. Refer to the section below that
corresponds to the motor control method used.
◆ V/f Motor Control Method Tuning
Table 5.1 Parameters for Tuning the Drive in V/f Motor Control Method
Problem Parameter No. Countermeasure
Default
Value
Suggested
Setting
• Motor hunting and
oscillation at speeds
between 10 and 40 Hz
Hunting
Prevention Gain
(n1-02)
• If insufficient motor torque relative to the
size of the load causes hunting, reduce the
setting.
• When motor hunting and oscillation occur
with a light load, increase the setting.
1.00 0.50 to 2.00
• Motor noise
• Motor hunting and
oscillation at speeds up
to 40 Hz
Carrier
Frequency
Selection
(C6-02)
• If the motor noise is too loud, increase the
carrier frequency.
• When motor hunting and oscillation occur at
speeds up to 40 Hz, lower the carrier
frequency.
• The default setting for the carrier frequency
depends on the drive capacity (o2-04) and the
Drive Duty Selection (C6-01).
7 (Swing
PWM 1)
1 to A
• Poor torque or speed
response
• Motor hunting and
oscillation
Torque
Compensation
Primary Delay
Time (C4-02)
• If motor torque and speed response are too
slow, decrease the setting.
• If motor hunting and oscillation occur,
increase the setting.
200 ms
<1>
<1> Default settings change when the motor control method is changed. The default setting shown is for V/f Control.
100 to 1000
ms
• Poor motor torque at
speeds below 10 Hz
• Motor hunting and
oscillation
Torque
Compensation
Gain (C4-01)
• If motor torque is insufficient at speeds below
10 Hz, increase the setting.
• If motor hunting and oscillation occur at
speeds below 10 Hz, decrease the setting.
1.00 0.50 to 1.50
• Poor motor torque at
low speeds
• Poor motor instability at
motor start
Mid Output
Vo l t a g e A
(E1-08)
Minimum
Output Voltage
(E1-10)
• If torque is insufficient at speeds below 10
Hz, increase the setting.
• If motor instability occurs at motor start,
decrease the setting. Note: The default value
is for 200 V class drives. Double this value
when using a 400 V class drive.
E1-08:
16.0 V
E1-10:
12.0 V
Initial value
±5 V
• Poor speed precision
Slip
Compensation
Gain
(C3-01)
• After setting the motor-rated torque (E2-01),
motor-rated slip (E2-02) and motor no-load
current (E2-03), adjust the slip compensation
gain (C3-01).
- 0.5 to 1.5
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