11.3 b: Application
744 YASKAWA ELECTRIC SIEP C710617 05F YASKAWA AC Drive GA700 Technical Manual
■ b8-16: PM E-Save Coefficient Ki
No.
(Hex.)
Name Description
Default
(Range)
b8-16
(01F8)
Expert
PM E-Save
Coefficient Ki
Sets torque linearity. This parameter uses the Ki value from the motor
nameplate. Usually it is not necessary to change this setting.
1.00
(0.00 - 3.00)
When b8-16 = 1.00 (default), the drive will automatically calculate and control the energy-saving coefficient. If
the motor nameplate has a description for “Ki”, set this parameter to the Ki value.
Do this procedure to prevent oscillation when you set b8-01 = 1 [Energy Saving Control Selection = Enabled].
1. Check U5-21 [Energy Save Coeff Ki] and make sure that it aligns with the Ki value on the motor nameplate.
2. If the numbers are different, set b8-16 to the Ki value on the motor nameplate.
■ b8-17: PM E-Save Coefficient Kt
No.
(Hex.)
Name Description
Default
(Range)
b8-17
(01F9)
Expert
PM E-Save
Coefficient Kt
Sets torque linearity. This parameter uses the Kt value from the motor
nameplate. Usually it is not necessary to change this setting.
1.00
(0.00 - 3.00)
When E5-01 = 1xxx, 2xxx [PM Motor Code Selection = Yaskawa SSR1 or SST4 series IPM motor], the drive
automatically calculates the energy-saving coefficient Kt and uses that value to control operation.
Do this procedure to prevent oscillation when you set b8-01 = 1 [Energy Saving Control Selection = Enabled].
1. Check U5-22 [Energy Save Coeff Kt] and make sure that it aligns with the Kt value on the motor nameplate.
2. If the numbers are different, set b8-17 to the Kt value on the motor nameplate.
■ b8-18: E-Save d-axis Current FilterTime
No.
(Hex.)
Name Description
Default
(Range)
b8-18
(01FA)
Expert
E-Save d-axis
Current FilterTime
Sets the d-axis current reference filter time constant.
0.100 s
(0.000 - 5.000 s)
■ b8-19: E-Save Search Injection Freq
No.
(Hex.)
Name Description
Default
(Range)
b8-19
(0B40)
Expert
E-Save Search
Injection Freq
Sets the frequency of Energy-saving control search operations. Usually it is
not necessary to change this setting.
Determined by A1-02
(20 - 300 Hz)
Note:
• If low inertia causes vibration in the machine, increase the setting value in 10 Hz increments and check the response. If A1-02 = 8
[Control Method Selection = EZ Vector Control], increase the setting value in 1 Hz increments.
• To make the motor more efficient, decrease the setting value in 1 Hz increments until the point immediately before machine vibration
starts to occur.
■ b8-20: E-Save Search Width
No.
(Hex.)
Name Description
Default
(Range)
b8-20
(0B41)
Expert
E-Save Search Width
Sets the amplitude of Energy-saving control search operations.
1.0 degrees
(0.1 - 5.0 degrees)
An increase in the value can make the operational efficiency better. However, if the load inertia is small, it may be
necessary to adjust the value to prevent machine vibration.
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