Mitsubishi Electric FR-A720-0.4K Instruction Manual page 505

Parameter
Name
Number
Tuning data unit
684
switchover
Induced voltage
706
constant
707 Motor inertia (integer)
Motor d-shaft
711 inductance Ld decay
ratio
Motor q-shaft
712 inductance Lq decay
ratio
Starting magnetic
721 pole position
detection pulse width
Motor inertia
724
(exponent)
Motor protection
725
current level
859 Torque current
*1 Initial values differ according to the inverter capacity. (55K or lower/75K or higher)
*2 The initial value differs according to the voltage level. (200V/400V)
POINT
· The settings are valid only under the PM sensorless vector control.
· When the wiring length between the inverter and the motor is long (30m or longer as a reference), use the
offline auto tuning function to drive the motor in the optimum operation characteristic.
· The offline auto tuning enables the operation with an IPM motor other than MM-CF.
· Tuning is enabled even when a load is connected to the motor. (As the load is lighter, tuning accuracy is higher.
Tuning accuracy does not change even if the inertia is large.)
· Reading/writing of motor constants tuned by offline auto tuning are enabled. You can copy the offline auto
tuning data (motor constants) to another inverter with the PU (FR-DU07/FR-PU07).
· The offline auto tuning status can be monitored with the PU (FR-DU07/FR-PU07/FR-PU04).
· Do not connect a surge voltage suppression filter (FR-ASF-H/FR-BMF-H) to the 55K or lower and sine wave
filter (MT-BSL/BSC) to the 75K or higher between the inverter and motor.
(1) Before performing offline auto tuning
Check the following before performing offline auto tuning.
· The PM sensorless vector control
· A motor should be connected. Note that the motor should be at a stop at a tuning start.
The motor capacity should be equal to or one rank lower than the inverter capacity.
·
· The maximum frequency under PM sensorless vector control should be 300Hz.
· Even if tuning is performed without motor running (Pr. 96 Auto tuning setting/status = "11"), the motor may
run slightly. Therefore, fix the motor securely with a mechanical brake, or before tuning, make sure that
there will be no problem in safety if the motor runs. (Caution is required especially in vertical lift
applications). Note that if the motor runs slightly, tuning performance is unaffected.
· Tuning is not available during position control under PM sensorless vector control.
Initial
Setting Range
Value
0
0
1
0
to 5000mV • s/rad
9999
9999
10 to 999
9999
9999
9999 0 to 100%, 9999
9999 0 to 100%, 9999
9999 0 to 6000µs, 9999
1 to 7
9999
9999
0 to 500%
9999
9999
55K or lower
9999
75K or higher
9999
should be
selected.
8/24
Internal data converted value
Displayed in "A, , mH, %"
Adjust the constant if the current fluctuates
during operation after tuning.
Constant value calculated based on the
tuning data
Set the motor inertia.
Uses the inertia of the MM-CF IPM motor
Tuning data
(The value measured by offline auto tuning
is automatically set.)
9999: Motor constant of the MM-CF IPM
motor. (Except 9999, the set value is the
motor constant.)
Set the motor inertia.
Uses the inertia of the MM-CF IPM motor
Set the maximum current (OCT) level of the
motor (%).
Uses the maximum current of MM-CF
Tuning data
0 to 500A
(The value measured by offline auto tuning
0 to 3600A
is automatically set.)
Uses the constant of the MM-CF IPM motor
Description
BCN-C22005-634