Nord Drivesystems SK 300P Series - Page 77

5 Parameter
BU 0800 en-4521 77
P314 Torq curr ctrl limit S P
Setting range
0 … 400 V
Factory setting
{ 400 }
Description
"Torque curr. Ctrl. limit". 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 range (see P320). The values
for P314 and P317 should always be set approximately the same, so that the field and
torque current controllers are balanced.
P315 Field curr. ctrl. P S P
Setting range
0 … 1000 %
Factory setting
{ 400 }
Description
Current controller for the field current. The higher the current controller parameters are
set, the more precisely the current setpoint is maintained. At low frequencies,
excessively high values of P315 generally result in high frequency oscillations. On the
other hand, excessively high values of P316 usually cause low frequency oscillations
over the entire speed range
The field current controller is switched off if the value "Zero" is entered in P315 and
P316. In this case, only the lead time for the motor model is used.
P316 Field curr. ctrl. I S P
Setting range
0 … 800 % / ms
Factory setting
{ 50 }
Description
I component of the field current controller (see P315 "Field current controller P").
P317 Field curr ctrl lim S P
Setting range
0 … 400 V
Factory setting
{ 400 }
Description
"
Field curr. ctrl. limit
". Determines the maximum voltage increase of the field current
controller. The higher the value, the greater the maximum effect of the field current
controller. Excessive values in P317 can specifically lead to instability during transition to
the field weakening range (see P320). The values for P314 and P317 should always be
set approximately the same, so that the field and torque current controllers are balanced.
P318 P weak S P
Setting range
0 … 800 %
Factory setting
{ 150 }
Description
The field weakening controller reduces the field setpoint if the synchronous speed is
exceeded. In the basic speed range, the field weakening controller has no function; for
this reason, the field weakening controller only needs to be set if speeds above the
nominal motor speed are set. Excessive values for P318 / P319 cause controller
oscillations. The field is not weakened 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 I weak S P
Setting range
0 … 800 % / ms
Factory setting
{ 20 }
Description
Only affects the field weakening range, see P318 "P weak”