Mitsubishi Electric FR-D720-0.2K-G, Инструкция по эксплуатации

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109
Selection and protection of a motor
4
P
A
RAMETE
R
S
 Parameters updated by tuning results after tuning
 Tuning adjustment (Pr.672)
 For a motor for which magnetic saturation occurs easily (a motor with a large Lq decay ratio), the overcurrent protective
function may be activated or the calculation error may occur (
Pr.96 = "93") during Lq tuning.
In this case, adjust the target current during tuning by decreasing the setting value of
Pr.672 Lq tuning target current
adjustment coefficient by 10%. The error may be corrected.
 Changing the motor constant
 The motor constants can be set directly when the motor constants are known in advance, or by using the data measured
during offline auto tuning.
If offline auto tuning has ended in error, obtain the information of motor constant from the motor manufacturer to set the
motor constants.
 The changed settings are stored in the EEPROM for the motor constant parameters.
 The following motor-constant parameters need to be set.
Pr. Name Description
90 Motor constant (R1) Resistance per phase
92 Motor constant (Ld) d-axis inductance
93 Motor constant (Lq) q-axis inductance
711 Motor Ld decay ratio d-axis inductance decay ratio
712 Motor Lq decay ratio q-axis inductance decay ratio
717
Starting resistance tuning
compensation
721
Starting magnetic pole position
detection pulse width
859 Rated PM motor current
96 Auto tuning setting/status
Pr. Name Setting Range Setting Increments Initial Value
90 Motor constant (R1) 0 to 50

, 9999 0.001

9999
92 Motor constant (Ld) 0 to 500mH, 9999 0.1mH
93 Motor constant (Lq) 0 to 500mH, 9999 0.1mH
706 Induced voltage constant (phi f)
0 to 5000mV (s/rad),
9999
0.1mV (s/rad)
726
Motor induced voltage constant (phi f)
exponent
0 to 2 1
859 Rated PM motor current 0 to 500A, 9999 0.01A
NOTE
 If "9999" is set, tuning data will be invalid. The drive unit internal constant is used.
 The motor constant parameters are valid for other than auto tuning.
Do not set the motor constant parameters when the S-PM geared motor is used. Doing so may cause abnormal
operation or damage the drive unit and/or the motor.