N8: Pm Motor Control - YASKAWA V1000 Technical Manual

5.9 n: Special Adjustments
Setting 0: Disabled
Setting 1: Enabled
u

n8: PM Motor Control

These parameters are available when using the special Open Loop Vector Control for permanent magnet motors and can
be used to adjust the control performance.
n n8-45: Speed Feedback Detection Control Gain (for PM OLV)
Sets the gain for internal speed feedback detection control. Although this setting rarely needs to be changed, adjustment
may be necessary under the following conditions:
• Increase this setting if motor oscillation or hunting occurs.
• Decrease this setting in increments of 0.05 to decrease the drive responsiveness.
No.
n8-45
n n8-47: Pull-In Current Compensation Time Constant (for PM OLV)
Sets the time constant for making the actual current and the pull-in current agree.
Although this setting rarely needs to be changed, adjustment may be necessary under the following conditions:
• Increase this setting when it takes too long for the reference value for the pull-in current to match the target value.
• Decrease this setting if motor oscillation occurs.
No.
n8-47
n n8-48: Pull-In Current (for PM OLV)
Tells the drive the amount of d-axis current to be provided to the motor during no-load operation at a constant speed. Set
as a percentage of the motor rated current.
• Increase this setting when hunting occurs or the motor speed is unstable while running at a constant speed.
• If there is too much current when driving a light load at a constant speed, then reduce this level slightly.
No.
n8-48
<1> Setting range varies depending on drive software version. Software versions PRG: 1018 and later disable pull-in current when n8-48 = 0, and
allow the pull-in current to be changed during Run.
PRG: 1018 and later: 0% or 20 to 200%
PRG: 1017 and earlier: 20 to 200%
n n8-49: d Axis Current for High Efficiency Control (for PM OLV)
Sets the amount of d axis current when using Energy Saving control as a percentage of the motor rated current.
Although this setting seldom needs to be changed, please note the following:
• If motor operation is unstable when driving heavy loads, try increasing this setting (towards 0).
• If motor parameters (E5) have been changed, this value will be reset to 0 and has to be readjusted.
No.
n8-49
<1> Setting range varies depending on drive software version. Software versions PRG: 1018 and later allow this parameter to be changed during
Run.
PRG: 1018 and later: -200.0 to 200.0%
PRG: 1017 and earlier: -200.0 to 0.0%
n n8-51: Acceleration/Deceleration Time Pull-In Current (for PM OLV)
Sets the d-axis current during acceleration and deceleration as a percentage of the motor rated current (E5-03).
Adjustments to this setting may help in the following situations:
• Increase this setting when a large amount of starting torque is required.
• Lower this setting if there is excessive current during acceleration and deceleration.
232
Name
Speed Feedback Detection Control Gain
Name
Pull-In Current Compensation Time Constant
Name
Pull-In Current
Name
d Axis Current for High Efficiency Control
YASKAWA ELECTRIC SIEP C710606 16C YASKAWA AC Drive – V1000 Technical Manual
Setting Range
0.00 to 10.00
Setting Range
0.0 to 100.0 s
Setting Range
Determined by
<1>
Setting Range
Determined by
<1>
Default
0.80
Default
5.0 s
Default
E5-01
Default
E5-01