PowerFlex Digital DC Drive User Manual -
Publication 20P-UM001C-EN-P - July 2008
Programming and Parameters
3-15
MO
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Field Config
98
[Fld Reg Ki Base]
Integral gain (K
I0
) of the field current regulator in (base value).
Default:
Min/Max:
3277.00
0.10 / 32770.00
456
[Fld Weaken Ratio]
The ratio of Motor Nameplate Base Speed to Par 45 [Max Ref
Speed] when Par 469 [Field Mode Sel] = 1 "Field Weaken". It is
the percentage of maximum application speed when field
weakening will begin. This value is "Motor Base Speed" / Par 45
[Max Ref Speed] x 100. If Par 469 [Field Mode Sel] = 0 “Base
Speed”, this parameter must be = 100%.
Default:
Min/Max:
Units:
100
0 / 100
%
467
[Max Fld Curr Pct]
Maximum allowable field current. The maximum value (100%)
corresponds to the value set in Par 280 [Nom Mtr Fld Amps].
The value of this field linearly affects the field current, unless a
flux curve is set in Pars 916, 917, and 918 [Fld Const xx Pct].
Note: This parameter can be assigned to an analog input or
output.
Default:
Min/Max:
Units:
100
Par 468 [Min Fld Curr Pct] / 100
%
468
468
[Min Fld Curr Pct]
Minimum allowable field current. The value set in this parameter
also influences the threshold at which the “Fld Current Loss”
(F6) fault occurs. The threshold is half of the value of Par 468
[Min Fld Curr Pct]. The value of Par 351 [Field Current] equals
the value of this parameter when Par 499 [Field Economy En] =
1 “Enabled” and Field Economy becomes active.
Default:
Min/Max:
Units:
30
0 / Par 467 [Max Fld Curr Pct]
%
467,
499
469
[Field Mode Sel]
Operating mode of the field controller.
•
“Base Speed” = The motor field is regulated with constant
current and controls the motor from zero to base speed. If a
curve is defined through Pars 916, 917 and 918 [Fld Const xx
Pct], this value will change linearly through Par 467 [Max Fld
Curr Pct] (which is a percentage of the nominal flux value set
in Par 280 [Nom Mtr Fld Amps]).
•
“Field Weaken” = The motor field is regulated with a
combination of torque and constant power (armature and field
regulation, i.e., field weakening). The maximum armature
voltage is configured in Par 175 [Rated Motor Volt].
•
“External” = The motor field power is supplied by an external
rectifier/converter (the drive’s field output is disabled).
Default:
Options:
0 =
0 =
1 =
2 =
“Base Speed”
“Base Speed”
“Field Weaken”
“External”
916,
917,
918
497
[Field Reg Enable]
Enables/Disables the field regulator.
•
“Enabled” = The field regulator is enabled and controlling the
field output.
•
“Disabled” = The field regulator is disabled. (i.e., The field
current is zero.) In addition, Par 473 [FldLoss Flt Cfg] should
be set to 0 “Ignore”.
Note: This parameter can be assigned to a digital input.
Default:
Options:
1 =
0 =
1 =
“Enabled”
“Disabled”
“Enabled”
473
498
[Force Min Field]
Enables/Disables the minimum field current value.
•
“Enabled” = The field current corresponds to the value set via
Par 468 [Min Fld Curr Pct].
•
“Disabled” = The field current is regulated based on the
quadrant mode and situation in which the drive is operating.
Note: This parameter can be assigned to a digital input (35
“Force MinFld”).
Default:
Options:
0 =
0 =
1 =
“Disabled”
“Disabled”
“Enabled”
File
Gr
oup
No.
Parameter Name & Description
See
page 3-2
for symbol descriptions
Values
Related
A
A
