Hitachi SJ Series, User Manual

Page: 163 / 786

12-3-4
Chapter 12 Inverter Functions
12.3.2 Motor constant setting
• Unstable motor operation
• Want to use a motor other than Hitachi’s.
• Want to use the vector control function.
• Want to use the automatic boost function.
• Note that the motor constants will be overwritten if
any of the following actions is taken. This applies to
both IM and SM (PMM).
- The motor capacity or number of motor poles is
changed.
- The auto-tuning is performed.
- The initialization is performed.
Please be advised to save the constants using the
R/W function on the operator keypad VOP.
• For details of adjustment, see “12.9,1 Control mode
selection”.
IM motor constant parameters
• Set the motor constant I0 in the following way if it is
switched from SJ700.
[Hb116]=(50Hz/A003)×H023 (or H033)
• The motor operation could be stabilized if the
following operations are made.
• In particular, the motor constants need to be set
according to the motor specifications when the
automatic boost function, automatic boost function
with sensor, sensorless vector control function, 0
Hz-range sensorless vector control function, or
vector control function with sensor is used.
• The motor constants of Hitachi’s standard motor
are automatically set to the followings when the
motor capacity or number of motor poles is
changed.
• Some of the motor constants in the followings are
automatically set to acquired constant data when
the auto-tuning function is used. For details, see the
next section.
• The motor constants can be chosen from the motor
constant selection or manually changed or
adjusted.
• Hitachi’s IE3 motor constants are used as initial
values of the induction motor (IM) constants.
・基底周波数を変更した場合、モータ定数 I0 の基準
値が変わり、変更ありと見なされます。(設定値は
維持されます)。正しい値をオートチューニングで
取得するか、日立の誘導モータ(IM)の初期値を呼び
出す場合には、[Hb103]極数選択を別の値、例えば、
一旦 4 極を 2 極にし、再び４極に設定することで変
更された後の基底周波数に対応するデータが
[Hb116]モータ定数 I0 に設定されます。
Item Parameters Data Description
Motor constant
R1
[Hb110] 0.000001~1000.000000( Ω ) Sets the primary resistance of IM.
Motor constant
R2
[Hb112] 0.000001~1000.000000( Ω ) Sets the secondary resistance of IM.
Motor constant L [Hb114] 0.000001~1000.000000(mH) Sets the leakage inductance of IM.
Motor constant
I0
[Hb116] 0.01~10000.00(A) Sets the no-load current of IM.
Motor constant J [Hb118] 0.00001~10000.00000(kgm
2
)
Sets the moment of inertia of the
system.
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