2.4 d: Reference Settings
154
YASKAWA ELECTRIC
TOEP C710687 03B FSDrive-MV1000 Parameter Guide
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-
= 63. Field Weakening
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.
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 drive
maximum output voltage.
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.
n
d6-03: Field Forcing Selection
Enables or disables the Field Forcing function.
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.
No.
Name
Setting Range
Default
d6-01
Field Weakening Level
0 to 100%
80%
No.
Name
Setting Range
Default
d6-02
Field Weakening Frequency Limit
0.0 to 120.0 Hz
0.0 Hz
No.
Name
Setting Range
Default
d6-03
Field Forcing Selection
0 or 1
0
No.
Name
Setting Range
Default
d6-06
Field Forcing Limit
100 to 400%
200%
MV1000ParameterGuide_E_conditional.book 154 ページ 2013年10月11日 金曜日 午後8時18分