Configuration
Function blocks
Internal motor control with vector control (MCTRL2)
8
8.2
8.2.7
8.2-63
EDSVF9333V EN 3.0-06/2005
As an alternative to the speed control, the vector control can be switched to
torque control with speed limitation.
Note!
In the basic configurations C0005 = 4xxx the torque control with
speed limitation is already set.
ƒ When MCTRL-N/M-SWT = HIGH, the torque control with speed
limitation is active.
– The torque control with torque setpoint selection via MCTRL-M-ADD
is active.
– MCTRL-M-ADD acts as a bipolar torque setpoint.
– The sign of the speed limitation value at MCTRL-N-SET is
automatically created from the sign of the torque setpoint at
MCTRL-M-ADD. Thus, the speed limitation value acts in both
directions of rotation.
– The actual torque is output as analog signal (in [%] of M
max
(C0057))
to MCTRL-MACT.
Stop!
If the motor is to create a holding torque at standstill, the torque
setpoint must not fall below a certain limit.
ƒ Depending on the motor type and accuracy of the identified
motor parameters, the vector control can become unstable if
the torque setpoint <10 % ... 20 %.
ƒ Operate the motor with speed feedback when the required
holding torque is within the critical region.
Torque control with speed
limitation
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