Toshiba T300MTX, Instruction Manual

Page: 67 / 140

IF08CZ10 April, 2019
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CIRCUIT OPERATION (cont’d)
Vector Control Simulator Follower Control (SFC, optional control used with a speed
sensor)
When the machine has torsional resonance, the (SFC) function may be used to try to reduce the
torsional vibration and increase the speed response.
With SFC, the speed regulator output signal is input to an inertia compensation block. This block
produces an estimated speed signal. The speed feedback is then subtracted from this value to create a
speed deviation signal. This signal is then sent through a proportional block and added to the output of the
speed regulator. The speed deviation signal is also sent through an anti-overshoot block and subtracted
from the speed regulator output. The combination of these two functions can be used to help improve the
recovery of the system during shock loading.
The speed deviation signal is also sent to a differential block and added to the torque reference (see
below). This signal is effective for torsional vibration control. When the SFC function is not used, set all of
the gains to 0.
Vector Control Torque Reference and Current Reference
The TRQ_REF signal, obtained from the calculation, results in the speed control compared with the
external input tension reference TENS_R signal, to find the torque reference T_R. In this optional control,
the operation is made based on TENS_R, used as a torque reference, during normal operation, and the
speed control circuit functioning as a speed limit. (Operation is made based on the external torque reference
in winding machines. However, if materials are broken, operation is changed to the speed control
operation.)
Torque reference
input
EXT_TRQ
(option)
Output of torque
reference speed
control
SFC_T_R
+
+
LMT_DIDT_P
LMT_DIDT_N
<di/dt>
Limit calculation
Section
3.5.4.2
<Torque limit>
1.0/100%
Tension reference input
with gain
(option)
EXT_TENS_GAIN
TENS_R2
X
Tension auxiliary
reference input
TENS_R_A
(option)
Tension reference
TENS_R1
(option)
1.0/100%
TRQ_REF
TENS_R
+
+
A
B
Min
A
B
Max
A
B
A>=B
IMPACT_TEST25
T_R
1.0/100%
Reverse coiling option
command
DI1_INP
R_TEN
CUT detection
If control, of the output
speed control signal,
continues for 60 ms or
longer, this status is
determined as an
asCUT detection.
CUT output
SSEQOUT1 Bit 2
Tension control
selection
sequence
+
+
A
B
A<=B
Torque Reference