D6: Field Weakening And Field Forcing; D7: Offset Frequency - YASKAWA E1000 Technical Manual

Setting 1: Lower Limit is Determined by Parameter d2-02
Only parameter d2-02 sets the lower frequency reference limit.

◆ 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 digital input programmed for H1- = 63. Field Weakening
should only be used with a known and unchanging light load condition. Use the Energy Saving function (b8-
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. Field Forcing can improve the motor responsiveness. It is ineffective during DC Injection Braking.
■
d6-01: Field Weakening Level
Sets the level to what the output voltage is reduced when Field Weakening is activated. Set as percentage of the
maximum output voltage.
No.
d6-01
■
d6-02: Field Weakening Frequency Limit
Sets the minimum output frequency for that field weakening can be activated. For frequencies below d6-02, Field
Weakening cannot be activated.
No.
d6-02

◆ d7: Offset Frequency

■
d7-01 to d7-03: Offset Frequency 1 to 3
Three different offset values can be added to the frequency reference. They can be selected using digital inputs
programmed for Offset frequency 1, 2, and 3 (H1- = 44, 45, 46). The selected offset values are added together if
multiple inputs are closed at the same time.
Note: This function can be used to replace the "Trim Control" function (H1- = 1C, 1D) of earlier Yaskawa drives.
No.
d7-01
d7-02
d7-03
Figure 5.28 illustrates the Offset frequency function.
Figure 5.28
Frequency
reference
YASKAWA ELECTRIC SIEP C710616 35D YASKAWA AC Drive E1000 Technical Manual
Parameter Name
Field Weakening Level
Parameter Name
Field Weakening Frequency Limit
Parameter Name
Offset Frequency 1
Offset Frequency 2
Offset Frequency 3
Offset Frequency 1 [d7-01]
(Signed)
Offset Frequency 2 [d7-02]
(Signed)
Offset Frequency 3 [d7-03]
(Signed)
Figure 5.28 Offset Frequency Operation
SFS
Multi-function
input (44) = on
Multi-function
input (45) = on
Multi-function
input (46) = on
5.4 d: Reference Settings
Setting Range Default
0 to 100%
Setting Range Default
0 to 200.0 Hz
Setting Range Default
-100.0 to 100.0%
-100.0 to 100.0%
-100.0 to 100.0%
Frequency
reference after
soft starter
common_TMonly
80%
0.0 Hz
0%
0%
0%
5
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