YASKAWA GA700 Technical Manual page 892

11.10 n: Special Adjustment
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n8-48: Pull-In Current (for PM Motors)
No.
Name
(Hex.)
n8-48 Pull-In Current (for
PM Motors)
(053B)
Adjust in the following situations.
• Slightly reduce this value if there is too much current when driving a light load at a constant speed.
• Increase the setting value in steps of 5% when hunting or vibration occurs during run at constant speed.
• Increase the setting value in steps of 5% if the motor stalls during run at constant speed.
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n8-49: d-Axis Cur forHighEfficiencyCont
No.
Name
(Hex.)
n8-49 d-Axis Cur
forHighEfficiency
(053C)
Cont
When running an IPM motor, the reluctance torque of the motor can be used to improve efficiency and contribute
towards energy conservation.
Set to "0" when running an SPM motor.
Adjust this parameter in the following circumstances.
• If the load is large and motor rotation is unstable, reduce the setting value.
• If the E5 parameters [PM Motor Settings] have been changed, set n8-49 = 0 first, then readjust.
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n8-51: Accel / Decel Pull-In Current
No.
Name
(Hex.)
n8-51 Accel / Decel Pull-In
Current
(053E)
Adjust this parameter in the following circumstances.
• Increase the setting value in increments of 5% when motors do not start smoothly due to significant loads.
• Reduce the setting value if excessive current flows during acceleration.
Note:
When set to A1-02 = 8 [Control Method Selection = EZ Open Loop Vector Control], n8-51 will always be in effect with respect to speed
ranges below what is set for n7-10 [Sensorless Switchover StartSpeed].
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n8-54: VoltErrorCompensationTime Const
No.
Name
(Hex.)
n8-54 VoltErrorCompensa
tionTime Const
(056D)
Adjust this parameter in the following circumstances.
• Increase the setting value if oscillation occurs at the time of startup.
• If hunting occurs when running at low speed, increase the setting value.
• If hunting occurs due to rapid changes in load, increase the setting value in 0.1 increments. If hunting cannot be
alleviated, set n8-51 [Accel / Decel Pull-In Current] to 0% and set n8-54 to 0.00 s, and disable compensation
for voltage errors.
892
V/f CL-V/f OLV CLV AOLV
On the basis that parameter E5-03 [Motor Rated Current (FLA)] is the
100% value, this parameter sets the d-axis current that flows to the motor
during run at constant speed as a percentage.
V/f CL-V/f OLV CLV AOLV
Sets, in terms of a percentage, the d-axis current to be supplied to the motor
to run it at a uniform speed with a heavy load. Considers E5-03 [Motor
Rated Current] to be 100%. Normally there is no need to change this
setting.
V/f CL-V/f OLV CLV AOLV
Sets, as a percentage, the pull-in current allowed to flow during
acceleration/deceleration, taking the motor rated current as a value of 100%.
V/f CL-V/f OLV CLV AOLV
Sets the time constant used when compensating for voltage errors.
YASKAWA ELECTRIC SIEP C710617 01B YASKAWA AC Drive GA700 Technical Manual
Description
OLV/PM AOLV/PM CLV/PM EZOLV OLV/PM
Description
OLV/PM AOLV/PM CLV/PM EZOLV OLV/PM
Description
OLV/PM AOLV/PM CLV/PM EZOLV OLV/PM
Description
OLV/PM AOLV/PM CLV/PM EZOLV OLV/PM
Default Setting
(Range)
30%
(20 - 200%)
Default Setting
(Range)
Determined by E5-01
(-200.0 - 0.0%)
Default Setting
(Range)
Determined by A1-02
(0 - 200%)
Default Setting
(Range)
1.00 s
(0.00 - 10.00 s)