P272 Operating Mode Of Closed-Loop Emf Control; P273 Control Word For Emf Controller Precontrol; P283 Filter Time For Actual Value For Emf Controller Precontrol; Closed Loop Emf Control - Siemens 6RA70 Series Instructions Manual

PNU Description
10.13 Closed-loop EMF control
P272 Operating mode of closed-loop EMF control
*
0 Fault message F043 ("EMF too high for braking operation") is
active: If the EMF is too high when a torque direction change is
(G165)
requested (i.e. if the calculated firing angle (K0101) for the
armature current in the new torque direction is > 165 degrees),
both torque directions are disabled. If, at the same time, the
absolute value of the armature current required in the new
torque direction is > 0.5% of rated converter DC current (P072),
fault message F043 is activated (see Section 10 for possible
fault causes).
1 Alarm A043 and automatic field reduction if EMF is too high in
braking operation.
If the EMF is too high in braking operation (i.e. if the following
applies to the armature firing angle α before limitation (K0101):
α > ( α W – 5 degrees)), alarm A043 is activated ( α W is the
inverter stability limit according to P151 or 165 degrees with a
discontinuous armature current).
The field is reduced with activation of A043. This field reduction
is achieved by regulating the armature firing angle to ( α W – 5
degrees) by means of a P controller, whose output reduces the
EMF controller setpoint. "Field weakening operation by internal
closed-loop EMF control" (P081=1) must therefore be
parameterized so that the field reduction can take effect.
When a torque direction change is requested, both torque
directions remain disabled until the field, and thus the EMF,
have been reduced accordingly (i.e. until the calculated firing
angle (K0101) for the armature current required in the new
torque direction is <165 degrees).
P273 Control word for EMF controller precontrol
*
0 EMF controller precontrol disabled, precontrol output = rated
FDS
motor field current (P102)
(G165)
1 EMF controller precontrol is active
P274 Set EMF controller I component to zero
*
0 Set controller I component to zero (i.e. to obtain pure P
FDS
controller)
(G165)
1 Controller I component is active
P275 EMF controller P gain
*
This parameter is automatically set during the field weakening optimization
FDS
run (P051=27).
(G165)
P276 EMF controller reset time
*
This parameter is automatically set during the field weakening optimization
FDS
run (P051=27).
(G165)
P277 EMF controller droop
*
FDS
(G165)
Filter time for setpoint for EMF controller precontrol [SW 1.9 and later]
P280
Filtering of the EMF setpoint at the input of the EMF controller precontrol.
FDS
The purpose of this filter is to decouple the EMF controller precontrol from
(G165)
the EMF controller.
P281 Filter time for setpoint for EMF controller
Filtering of the EMF setpoint at the input of the EMF controller.
FDS
The purpose of this filter is to decouple the EMF controller precontrol from
(G165)
the EMF controller.
P282 Filter time for actual value for EMF controller
FDS Filtering of actual EMF value at the input of the EMF controller.
(G165)
P283 Filter time for actual value for EMF controller precontrol
FDS
Filtering of actual speed value at the input of the EMF controller precontrol.
(G165)
The purpose of this filter is to stabilize the EMF controller precontrol, even
when the actual speed signal is unsteady or distorted by harmonics.
10-38
Value range
[Unit]
Steps
0 to 1
1
0 to 1
1
0 to 1
1
0.10 to 100.00
0.01
0.010 to 10.000
[s]
0.001s
0.0 to 10.0
[%]
0.1%
0 to 10000
[ms]
1ms
[SW 1.9 and later] 0 to 10000
[ms]
1ms
[SW 1.9 and later] 0 to 10000
[ms]
1ms
0 to 10000
[SW 1.9 and later] [ms]
1ms
SIMOREG DC Master Base Drive Panel Operating Instructions
No. indices See
Factory Change
setting (Access /
Type Status)
Ind: None P052 = 3
FS=0 P051 = 40
Type: O2 Offline
Ind: 4 P052 = 3
FS=1 P051 = 40
Type: O2 Offline
Ind: 4 P052 = 3
FS=1 P051 = 40
Type: O2 Offline
Ind: 4 P052 = 3
FS=0.60 P051 = 40
Type: O2 Online
Ind: 4 P052 = 3
FS=0.200 P051 = 40
Type: O2 Online
Ind: 4 P052 = 3
FS=0.0 P051 = 40
Type: O2 Online
Ind: 4 P052 = 3
FS=0 P051 = 40
Type: O2 on-line
Ind: 4 P052 = 3
FS=0 P051 = 40
Type: O2 on-line
Ind: 4 P052 = 3
FS=0 P051 = 40
Type: O2 on-line
Ind: 4 P052 = 3
FS=0 P051 = 40
Type: O2 on-line
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