Setting Procedure Of Real Sensorless Vector Control (Speed Control) - Mitsubishi Electric FR-A720-0.4K Instruction Manual

Fr-a700 series
Hide thumbs Also See for FR-A720-0.4K:
Table of Contents

Advertisement

Speed control by real sensorless
vector control, vector control
4.4.1

Setting procedure of real sensorless vector control (speed control)

Set the motor capacity and the number of motor poles. (Pr. 80, Pr. 81)
Select a control method. (Refer to page 91)
Set the operation command. (Refer to page 295)
Perform offline auto tuning. (Pr. 96)
As required
⋅ Easy gain tuning (Refer to page 104)
⋅ Select online auto tuning. (Pr. 95) (Refer to page 191)
⋅ Manual input speed control gain adjustment (Refer to page 106)
CAUTION
⋅ Make sure to perform offline auto tuning before performing real sensorless vector control.
⋅ The carrier frequencies are selectable from among 2k, 6k, 10k, 14kHz for real sensorless vector control.
⋅ Torque control can not be performed in the low speed region and at a low speed with light load. Choose vector control.
⋅ Performing pre-excitation (LX signal and X13 signal) under torque control may start the motor running at a low speed even when
the start command (STF or STR) is not input. The motor may run also at a low speed when the speed limit value=0 with a start
command input. Perform pre-excitation after making sure that there will be no problem in safety if the motor runs.
⋅ Do not switch between the STF (forward rotation command) and STR (reverse rotation command) during operation under torque
control. Overcurrent shut-off error (E.OC ) or opposite rotation deceleration error (E.11) occurs.
⋅ For the 0.4K to 3.7K, the speed deviation may become large at 20Hz or less and torque may become insufficient in the low speed
region under 1Hz during continuous operation under real sensorless vector control. In such case, stop operation once and
reaccelerate to improve the problems.
⋅ When the inverter is likely to start during motor coasting under real sensorless vector control, set to make frequency search of
automatic restart after instantaneous power failure valid (Pr. 57 ≠ "9999", Pr. 162 = "10").
96
Perform secure wiring.
(Refer to page 14.)
Set the motor. (Pr. 71)
(Refer to page 179.)
(Refer to page 91.)
Set the motor capacity (kW) in Pr. 80 Motor capacity and set the number of
motor poles (number of poles) in Pr. 81 Number of motor poles.
(V/F control is performed when the setting is "9999" (initial value).
Set "10" (speed control) or "12" (speed-torque switchover) in Pr. 800 and make
speed control valid.
Select the start command and speed command.
(1) Start command
1)Operation panel: Setting by pressing
2)External command: Setting by forward rotation and reverse rotation
command (terminal STF or STR)
(2) Speed command
1)Operation panel: Setting by turning
2)External analog command (terminal 2 or 4) :
Give a speed command using the analog signal input to terminal 2 (or
terminal 4).
3)Multi-speed command:
The external signals (RH, RM, RL) may also be used to give speed
command.
Set the torque limit. (Pr. 810)
(Refer to page 98.)
(Refer to page 181.)
Sensorless
Sensorless
Sensorless
/
of the operation panel
of the operation panel

Advertisement

Table of Contents
loading

Table of Contents