Mitsubishi Electric FR-F820-00077 Instruction Manual page 496

(C) Motor constant parameters
Parameters in which tuning results are set after tuning
First
motor
Pr.
90
92
93
711
712
717
721
859
96
Tab. 5-150: Setting of motor constants after tuning
Tuning adjustment (Pr. 1002)
The overcurrent protective function may be activated during Lq tuning for an easily magnetically sat-
urated motor (motor with a large Lq decay ratio). In such case, adjust the target flowing current used
for tuning with Pr. 1002 "Lq tuning target current adjustment coefficient".
Changing the motor constants
● If the motor constant is known, the motor constant can be set directly or set using data measured
through offline auto tuning.
● According to the Pr. 71 (Pr. 450) setting, the range of the motor constant parameter setting values
and units can be changed. The setting values are stored in the EEPROM as motor constant
parameters, and two types of motor constants can be stored.
5 - 324
Second
motor Name
Pr.
458 Motor constant (R1)
Motor constant (L1)/
460
d-axis inductance (Ld)
Motor constant (L2)/
461
q-axis inductance (Lq)
739 Motor Ld decay ratio
740 Motor Lq decay ratio
Starting resistance tuning
741
compensation
Starting magnetic pole
742 position detection pulse
width
Torque current/
860
Rated PM motor current
463 Auto tuning setting/status
Other than V/F control or
MM-EFS/MM-THE4 MM-EFS/MM-THE4
Pr. 96 (Pr.4 63) = 1 Pr. 96 (Pr. 463) = 11
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Parameters
Description
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Resistance per phase
⎯
d-axis inductance
⎯
q-axis inductance
d-axis inductance
⎯
decay ratio
q-axis inductance
⎯
decay ratio
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When the setting
value is 10000 or
more: With polarity
inversion for
⎯
compensation,
voltage pulse
(Pr. setting minus
10000) μs
⎯
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