D6: Field Weakening And Field Forcing - YASKAWA U1000 Technical Manual

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
n d6-03: Field Forcing Selection
Enables or disables the Field Forcing function.
No.
d6-03
Setting 0: Disabled
Setting 1: Enabled
n d6-06: Field Forcing Limit
Sets the maximum level at which the Field Forcing function can boost the excitation current reference. The value is set as a
percentage of the motor no load current. This parameter does not normally need to be changed.
YASKAWA ELECTRIC SIEP C710636 04D U1000 Industrial MATRIX Drive Technical Manual
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
Parameter Name
Field Forcing Selection
5.4 d: Reference Settings
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
Setting Range
0, 1
Default
10%
Default
0 ms
Default
1
Default
80%
5
Default
0.0 Hz
Default
0
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