5.4
Control parameters
BU 0500 GB
Subject to technical alterations
83
Parameter
Set value / Description / Note
Device
Supervisor
Parameter
set
P312
Torque current controller P
SK 520E
and above
S P
0 ... 800 %
[ 200 ]
Current controller for the torque current. The higher the current controller parameters are set, the
more precisely the current setpoint is maintained. Excessively high values in P312 generally lead
to high-frequency oscillations at low speeds; on the other hand, excessively high values in P313
generally produce low frequency oscillations across the whole speed range.
If the value "Zero" is entered in P312 and P313, then the torque current control is switched off. In
this case, only the motor model lead is used.
P313
Torque current controller I
SK 520E
and above
S P
0 ... 800 % / ms
[ 125 ]
I-component of the torque current controller. (See also P312 >Torque current controller P<)
P314
Torque current controller limit
SK 520E
and above
S P
0 ... 400 V
[ 400 ]
Determines the maximum voltage increase of the torque current controller. The higher the value,
the greater the maximum effect that can be exercised by the torque current controller. Excessive
values in P314 can specifically lead to instability during transition to the field weakening zone (see
P320). The values for P314 and P317 should always be set roughly the same, so that the field
and torque current controllers are balanced.
P315
Field current controller P
SK 520E
and above
S P
0 ... 800 %
[ 200 ]
Current controller for the field current. The higher the current controller parameters are set, the
more precisely the current setpoint is maintained. Excessively high values for P315 generally lead
to high frequency vibrations at low speeds. On the other hand, excessively high values in P316
generally produce low frequency vibrations across the whole speed range If the value "Zero" is
entered in P315 and P316, then the field current controller is switched off. In this case, only the
motor model lead is used.
P316
Field current controller I
SK 520E
and above
S P
0 ... 800 % / ms
[ 125 ]
I-component of the field current controller. See also P315 >Field current controller P<
P317
Field current controller limit
SK 520E
and above
S P
0 ... 400 V
[ 400 ]
Determines the maximum voltage increase of the torque current controller. The higher the value,
the greater is the maximum effect that can be exercised by the field current controller. Excessive
values in P317 can specifically lead to instability during transition to the field reduction range (see
P320). The values for P314 and P317 should always be set roughly the same, so that the field
and torque current controllers are balanced.
P318
Weak field control P
SK 520E
and above
S P
0 ... 800 %
[ 150 ]
The weak field control reduces the field setpoint when the synchronous speed is exceeded.
Generally, the weak field control has no function; for this reason, the field reduction controller only
needs to be set if speeds are set above the nominal motor speed. Excessive values for P318 /
P319 will lead to controller oscillations. The field is not reduced sufficiently if the values are too
small or during dynamic acceleration and/or delay times. The downstream current controller can
no longer read the current setpoint.
P319
Weak field control I
SK 520E
and above
S P
0 ... 800 % / ms
[ 20 ]
Affects only the field reduction range, see P318 >Field reduction controller P<
