Rockwell Automation PowerFlex series, Руководство пользователя

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PowerFlex Digital DC Drive User Manual - Publication 20P-UM001C-EN-P - July 2008
C-26 Application Notes
Manually Adjusting the Current Regulator Tune Settings
During the current regulator auto tuning test the value of Par 587 [I Reg
Error] displays. This parameter is used to determine whether the current
regulator is correctly tuned. The value should be as near to zero as possible,
but values between -40 and +40 are acceptable. Any changes to the resulting
value are made in Par 454 [Arm Inductance] in order to fine tune the speed
regulator and set Par 587 [I Reg Error] to an acceptable value.
❏
If the value of Par 587 [I Reg Error] is positive, increase the value
of Par 454 [Arm Inductance].
❏
If the value of Par 587 [I Reg Error] is negative, decrease the value
of Par 454 [Arm Inductance].
Fine Tuning the Field Current Regulator
Important: In most cases motors with a direct current and an independent
excitation work with a constant field (Par 469 [Field Mode Sel]
= 0 “Base Speed”). In this case it is not necessary to optimize
the field current or armature voltage regulators.
The procedure below is used for drives that use constant torque and power
(mixed armature and field regulation). In these cases it is necessary to
configure the field converter according to this method.
Important: Do not issue a “Start” command to the drive during the field
current regulator fine tuning procedure.
Follow the procedure below to fine tune and optimize the field current
regulator:
1. Configure the following parameters:
❏
Set Par 467 [Max Fld Curr Pct] = 100% of the field rated current of
the connected motor
❏
Set Par 468 [Min Fld Curr Pct] = 0
❏
Set Par 91 [Fld Reg Kp] = 0.00
❏
Set Par 92 [Fld Reg Ki] = 0.00
2. Measure the field current using an analog output by setting:
❏
Par 66 [Anlg Out1 Sel] = 18 “Fld Current”
❏
Par 67 [Anlg Out2 Sel] = 24 “Field Ref”