D6: Field Weakening And Field Forcing - YASKAWA AC Drive-A1000 Technical Manual

5.4 d: Reference Settings
n d5-04: Speed Limit
Sets the speed limit during torque control if parameter d5-03 is set to 2.
page 180.
No.
d5-04
n d5-05: Speed Limit Bias
Applies a bias set as a percentage of the maximum output frequency to the speed limit value.
Speed Limit Bias on page
No.
d5-05
n d5-06: Speed/Torque Control Switchover Time
Sets the delay time for switching between Speed Control and Torque Control.
No.
d5-06
n d5-08: Unidirectional Speed Limit Bias
Selects how the speed limit bias is applied.
No.
d5-08
Setting 0: Disabled
The speed limit bias is applied in the speed limit direction and the opposite direction.
Setting 1: Enabled
The speed limit bias is applied in the opposite direction of the speed limit only.
u

d6: Field Weakening and Field Forcing

Field Weakening
The Field Weakening function reduces the output voltage to a predefined level to reduce the energy consumption of the motor.
To activate the Field Weakening function, use a digital input programmed for H1-oo = 63. Only use Field Weakening with
a known and unchanging light load condition. Use the Energy Saving function (b8-oo parameters) when Energy Saving for
various different load conditions is required.
Field Forcing
The Field Forcing function compensates the delaying influence of the motor time constant when changing the excitation current
reference and improves motor responsiveness. Field Forcing is ineffective during DC Injection Braking.
n d6-01: Field Weakening Level
Sets the level to which the output voltage is reduced when Field Weakening is activated. Set as percentage of the maximum
output voltage.
No.
d6-01
n d6-02: Field Weakening Frequency Limit
Sets the minimum output frequency at which field weakening can be activated. Field Weakening cannot be activated for
frequencies below d6-02.
No.
d6-02
182
Parameter Name
Speed Limit
180.
Parameter Name
Speed Limit Bias
Parameter Name
Speed/Torque Control Switchover Time
Parameter Name
Unidirectional Speed Limit Bias
Parameter Name
Field Weakening Level
Parameter Name
Field Weakening Frequency Limit
Refer to Speed Limitation and Speed Limit Bias on
YASKAWA ELECTRIC SIEP C710616 31B YASKAWA AC Drive – A1000 Technical Manual
Setting Range
-120 to 120%
Refer to Speed Limitation and
Setting Range
0 to 120%
Setting Range
0 to 1000 ms
Setting Range
0, 1
Setting Range
0 to 100%
Setting Range
0 to 400.0 Hz
Default
0%
Default
10%
Default
0 ms
Default
1
Default
80%
Default
0.0 Hz