Performing High-Accuracy, Fast-Response Control (Gain Adjustment For Pm Motor Control) - Mitsubishi Electric FR-F800 Instruction Manual

Speed control under PM motor control
NOTE
• To change to the PM motor control, perform PM parameter initialization at first. If parameter initialization is performed after
setting other parameters, some of those parameters will be initialized too. (Refer to
initialized.)
• Constant-speed operation cannot be performed in the low-speed range of 150 r/min or less.
• During PM motor control, the RUN signal is output about 100 ms after turning ON the start command (STF, STR). The delay
is due to the magnetic pole detection.
• During PM motor control, the automatic restart after instantaneous power failure function operates only when an MM-EFS or
MM-THE4 IPM motor is connected.
When a regeneration unit is used, the frequency search may not be available if the rotation speed is about 10% higher than
the rating.
5.3.2
Performing high-accuracy, fast-response control
(gain adjustment for PM motor control)
Manual gain adjustment is useful for achieving optimum machine performance or improving unfavorable conditions,
such as vibration and acoustic noise during operation with high load inertia or gear backlash.
Pr. Name
820
Speed control P gain 1
G211
821 Speed control integral
G212 time 1
Torque control P gain 1
824
(current loop
G213
proportional gain)
Torque control integral
825
time 1 (current loop
G214
integral time)
830
Speed control P gain 2
G311
831 Speed control integral
G312 time 2
834
Torque control P gain 2
G313
835 Torque control integral
G314 time 2
154
PARAMETERS
Initial Setting
value range
25% 0 to 1000%
0.333 s 0 to 20 s
50% 0 to 500%
40 ms 0 to 500 ms
0 to 1000%
9999
9999
0 to 20 s
9999
9999
0 to 500%
9999
9999
0 to 500 ms
9999
9999
page 151
Description
The proportional gain during speed control is set. (Setting
this parameter higher improves the trackability for speed
command changes. It also reduces the speed fluctuation
caused by external disturbance.)
The integral time during speed control is set. (Setting this
parameter lower shortens the return time to the original
speed when the speed fluctuates due to external
disturbance.)
The proportional gain of the current controller is set.
The integral time of the current controller is set.
Second function of Pr.820 (valid when RT signal is ON)
The Pr.820 setting is applied to the operation.
Second function of Pr.821 (valid when RT signal is ON)
The Pr.821 setting is applied to the operation.
Second function of Pr.824 (valid when RT signal is ON)
The Pr.824 setting is applied to the operation.
Second function of Pr.825 (valid when RT signal is ON)
The Pr.825 setting is applied to the operation.
for the parameters that are
PM PM PM