Description of the Software Modules and Parameters
Parameter manual b maXX BM5800
Document No.: 5.16029.03
659
of 814
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3.8.11 Operating mode current control
At the current control operating mode (Z109.1– = -2) either the torque current set value
or a torque set value (as of FW version 1.14 and if Z18.9– bit 5 = 1) can be specified. In
this case the speed controller output has no effects.
The set field current is determined by the field weakening controller or from the flux con-
troller.
The torque current and the field current are controlled in the d-q-current controller.
The torque current set value can be written to the writable parameter "isq set value for
OM current control (
Z18.50–) in % (standardization: 100%= I
sq max
Z19.8–)
The torque set value can be written in the writable parameter "Torque set value for OM
current control" (
Z18.78–) in % (standardization: 100% = M
base
Z138.34–).
At the torque current specification (Z18.9– bit 5 = 0) the torque current set value in A is
converted. At the torque specification (Z18.9– bit 5 = 1) the torque set value at first is re-
scaled and then is converted with the current Kt factor (Kt-factor Z107.44– * Kt correction
factor Z138.23–) and the flux set value Z146.13– into a torque current in A. Then, the
result (torque current set value in A) is passed on to the motor manager in RT0 cycle (lsq
set value unlimited
Z18.45–).
Furthermore, additional torque current Z19.7– can be added to the lsq set value unlimit-
ed. The result is checked upon limits and is transferred to the current controller (lsq set
value
Z47.1–).
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