Lenze 8600 series - Torque Controller; Features

10 Torque controller
10.1 Features
The torque control is used to supply a torque which is proportional
to the setpoint, depending on a torque reference at a connected AC
asynchronous machine. For this, the torque setpoint is entered via
an analog Signal input which is permanently compared with the
torque supplied to the motor shaft.
If the torque setpoint exceeds the act. value torque, the field
frequency and thus the output voltage is reduced until setpoint and
act. value are identical. If the act. value torque is reduced when the
load is removed from the drive, the field frequency is increased
again.
A motor without load and with a torque setpoint higher than OV will
accelerate to the field frequency setpoint, i.e. the drive operates as
torque Source.
The following torque characteristic Shows the behaviour of the
torque control.
-
-
Matt
1
Mset -
Loading
-5
Unloading
fdset fd
Function
The principle of the torque control is based on the detection and
control of the torque-generating component of the motor current.
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