Firmware
≤
02.00 - DMS 2.1 EN - 03/2011
L
95
8400 motec | Software Manual
Motor control (MCTRL)
Sensorless vector control (SLVC)
5.8.2
Speed control with torque limitation
A speed setpoint is selected and the drive system is operated in a speed-controlled manner.
The operational performance can be adapted in the following ways:
Overload limitation in the drive train
– The torque is limited via the torque setpoint.
– The torque setpoint is identical to the value at the output of the speed controller,
nOutputSpeedCtrl
.
– To avoid overload in the drive train, the torque in motor mode can be limited via the
nTorqueMotLimit_a
process input signal, and the torque in generator mode can be
limited via the
nTorqueGenLimit_a
process input signal:
Motor current limitation
– A cross current setpoint is calculated from the torque setpoint which is limited
depending on the magnetising current, the max. current in motor mode (
and the max. current in generator mode (
– Here, the total current injected into the motor does not exceed the max. currents in
motor and generator mode.
– Using a slip model, the slip of the machine is reconstructed.
– The slip compensation (
) acts as the influencing parameter.
Identifier
DIS code | data type
Information/possible settings
nTorqueMotLimit_a
| INT
Torque limitation in motor mode
• Scaling: 16384
≡
100 % M
max
(
)
• Setting range: 0 … +199.99 %
nTorqueGenLimit_a
| INT
Torque limitation in generator mode
• Scaling: 16384
≡
100 % M
max
(
)
• Setting range: -199.99 ... 0 %
Note!
To avoid instabilities during operation, the torque limit values are internally
processed as absolute values.
Содержание 8400 motec Series
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