Lenze EVF9383 - Manual (Page 269)

Configuration
Function blocks
Internal motor control with vector control (MCTRL2)
8
8.2
8.2.7
l
8.2−53 EDSVF9383V EN 7.1−04/2012
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.
)
Note!
Due to physical regularities, the operability of the flying restart
circuit depends on the application, the motor and the motor
power.
ƒ With EVF9335 ... EVF9338 and EVF9381 ... EVF9383 devices,
the operability of the flying restart circuit can therefore not be
guaranteed.
Torque control with speed
limitation
Automatic speed detection
after controller enable − flying
restart circuit