Toshiba T300MVi MEDIUM VOLTAGE - Circuit Operation - Speed Control

- 36
d/dt
CIRCUIT OPERATION (cont’d)
Speed Control
The following figure shows the speed control block diagram.
The speed reference signal SP_R and the filtered speed feedback are input and the deviation
between these two is subjected to proportional/integral operations and output. After this signal is subjected
to torque filtering and torque limit processing, a torque reference SFC_T_R is output.
Control response is performed with the following parameter settings.
ASPR_A: Anti-overshoot gain
ASPR_AT: Anti-overshoot gain time constant
ASPR_P: Proportional gain
ASPR_W1: Response target
Note that if the GD
2
of the machine is extremely large compared to GD
2
of the motor or if there is
torsional resonance, the control response may need to be slow.
Speed Control
Limit
Block
Speed
reference
SP_R
Speed control gain
switching (option)
Switching of a
Minimum of 4 stages
ASPR_G_SEL
<Anti-over>
<Speed control>
ASPR_A: Anti-overshoot
ASPR_AT: Anti-overshoot time constant
ASPR_P: Proportional gain
ASPR_W1: Response target
Speed
feedback
SP_F
<Torque limit>
4000/100%
SFC_T_R
SFC_DATA
FLT_T_R
OP_SFC_P: Proportional gain
OP_SFC_D: Differential gain
OP_SFC_A: Anti-over gain
LMT_SFC_D: Differential limit
<Limit>
<Differential>
<Proportional>
<Anti-over>
<inertia><Filter>
SFC (option)
Simulator
FLT_SFC OP_SFC_J
<Filter>
<Integration>
<Proportion>
+
+
+
-
+
+
+
-
-
+
<Filter>
FLT SP
-
+