Delta Electronics MVF2000 Series, Product Manual

Page: 68 / 136

Table 4-62 Field weakening
ID Parameter Min Max Unit Default Description
P0443
Field weakening
enable
0 1 0
0-Disable
1-Enable
P0444
Start frequency of
field weakening
0 150 % 100
P0445
Field weakening
coefficient
0 100 % 90

Field weakening function is applied to the load with constant power. when VFD operates
below start frequency of field weakening, the motor flux is controlled to a constant value.
While motor speed is above start frequency of field weakening, VFD will decrease flux to
make output voltage remain constant.
Table 4-63 Energy saving operation
ID Parameter Min Max Unit Default Description
P1368
Energy saving
operation enable
0 1 0
0=Disable
1=Enable
P1369
Ki of energy saving
operation
0 65535 0
P1370
Coefficient of energy
saving operation Ki
0 65535 % 100
P1371
Output limit of
energy saving
operation controller
0 100 % 60
Percentage of flux
reference
P1372
Frequency lower
limit of energy saving
operation
0 100 % 10
Percentage of rated
frequency

Energy saving operation function is used to decrease motor current in order to save
energy and decrease the motor noise. This function can be used in applications such as
fans, pumps etc.
Table 4-64 Droop control
ID Parameter Min Max Unit Default Description
P1025 Droop coefficient 0 50 % 0
P1026
Dynamic droop time
constant
0 32 s 0
P1027
Speed reference
offset of droop
0 20 % 0
P1028 Droop mode 0 1 0
0-Normal
1-Linear

There are two operation mode for droop control.
Droop mode Description
Normal The droop coefficient is constant.