YASKAWA FSDrive-MV1000 Parameter Manual page 154

2.4 d: Reference Settings
u d6: Field Weakening and Field Forcing
Field Weakening
The Field Weakening function reduces the output voltage to a pre-defined level in order to reduce the energy
consumption of the motor. It can be activated using a contact input programmed for H1-
should only be used with a known and unchanging light load condition.
Field Forcing
The Field Forcing function compensates for the delaying influence of the motor time constant when changing the
excitation current reference and improves motor responsiveness. Field Forcing ineffective during DC Injection Braking.
d6-01: Field Weakening Level
n
Sets the level to which the output voltage is reduced when Field Weakening is activated. Set as percentage of the drive
maximum output voltage.
No.
d6-01
d6-02: Field Weakening Frequency Limit
n
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
d6-03: Field Forcing Selection
n
Enables or disables the Field Forcing function.
No.
d6-03
Setting 0: Disabled
Setting 1: Enabled
d6-06: Field Forcing Limit
n
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.
No.
d6-06
154
Name
Field Weakening Level
Name
Field Weakening Frequency Limit
Name
Field Forcing Selection
Name
Field Forcing Limit
Setting Range
0 to 100%
Setting Range
0.0 to 120.0 Hz
Setting Range
0 or 1
Setting Range
100 to 400%
YASKAWA ELECTRIC TOEP C710687 03B FSDrive-MV1000 Parameter Guide
= 63. Field Weakening
Default
80%
Default
0.0 Hz
Default
0
Default
200%