YASKAWA V1000 Series Installation & Start-Up Manual page 190

5.2 Motor Performance Fine Tuning
Problem
• Poor speed response and
stability
• Poor speed precision
• Motor noise
• Control motor hunting and
oscillation occur at speeds
below 10 Hz.
• Poor motor torque at low
speeds
• Poor speed response
• Motor instability at motor
start.
<1> Default settings change when the motor control method is changed. The default setting shown here is for
V/f Control.
When using OLV Motor Control, leave the torque compensation gain (C4-01) at its
default setting of 1.00. To increase speed precision during regeneration in OLV
Motor Control, enable slip compensation during regeneration (C3-04 = "1").
190
YASKAWA TM.V1000.01 V1000 Drive Installation & Start-Up Manual (Preliminary 01-19-07)
Parameter No.
Slip
• If response is slow, gradually decrease the
Compensation
setting by 0.1.
Primary Delay
• If speed is unstable, gradually increase the
Time Constant
setting by 0.1.
(C3-02)
• If speed is too slow, gradually increase the
setting by 0.1 ms.
Slip • If speed is too fast, gradually decrease the
Compensation setting by 0.1 ms. Note: Default settings
Gain (C3-01) change when the motor control method is
changed. The default setting shown here is
for Open Loop Vector Control.
• If there is too much motor noise, the
carrier frequency is too high.
Carrier • If motor hunting and oscillation occur at
Frequency low speeds, reduce the carrier frequency.
Selection • The default setting for the carrier
(C6-02) frequency depends on the drive capacity
(o2-04) and the Drive Duty Selection (C6-
01).
• If motor torque and speed response are too
Mid Output
slow, increase the setting.
Voltage A
• If the motor exhibits excessive instability
(E1-08)
at start-up, reduce the setting. Note: The
Minimum
default value is for 200 V class units.
Output Voltage
Double this value when using a 400 V
(E1-10)
class drive.
Countermeasure
Default Suggested
Value Setting
200 ms 100 to 500
ms
<1>
1.0
0.5 to 1.5
<1>
7
0 to the
(Swing
default
PWM
setting
1)
E1-08:
12.0 V
<1>
Initial ±2 V
E1-10:
2.5 V
<1>