12
4.4.1.2 PDA Static Tuning
Set
Pr.94=55
, then reset the inverter, then the inverter will show “
Auto
” on the keypad, waiting to accept
“FWD”,
“
REV
” or “
STOP
” command.
In push “FWD” or “REV”, the inverter will start tuning process by injecting direct current into the motor windings.
And while tuning, the motor should remain standstill throughout the entire tuning process.
If push “STOP” key while tuning is in progress, the inverter will stop the motor immediately and show “
Er.tu
”.
4.4.1.3 PDA Sensor-less related parameters
After tuning, these parameters are subject to change according the tuning results:
Pr.09 is general voltage boost value.
Pr.67 is RUN mode selection parameter
If tuning complete, Pr.67 will be set to 3, select Sensor-Less (II) compensation mode.
If tuning failed, Pr.67 will be set to 1, select standard V/F (II) mode.
Pr.68 is special voltage compensation factor
If tuning complete, Pr.68 will be used for Sensor-less voltage compensation.
If tuning failed, Pr.68 will be default to 5.0
Pr.69 is special frequency compensation factor
If tuning complete, Pr.69 will be used for Sensor-less compensation
If tuning failed, Pr.69 will be default to 50.50
4.4.1.4 PDA Tuning Fail process
When tuning process initiated, the display will show “
Auto
” and flashing. If push “STOP” key during this period,
the tuning process will be terminated immediately, and display will show “
Er.tu
” means
Tuning Error
.
If Error Tuning occurs, contents of these parameters will be default value.
Pr.09 = 3
Pr.67 = 1
Pr.68 = 5.0
Pr.69 = 50.50
4.4.2 Auto Tuning for PDAN series
For PDAN series, the embedded Auto-Tuning program can search the internal characteristics of motor.
Before start auto-tuning process, these parameters should be assigned first:
Pr.01: Main Acceleration rate
Pr.02: Main Deceleration rate
Pr.10: Base frequency (Hz) of the motor
Pr.11: Voltage (%) when the inverter output frequency reaches Base Frequency
Pr.15: Maximum frequency >= Pr.10
Pr.68: Sensor-Less Boost=0
Pr.78: Current Rating (%) of the motor = (Motor Full Load current / Inverter Full Load current)*100%
Pr.88: Voltage (%) when the inverter output frequency reaches Upper Frequency
4.4.2.1 PDAN Tuning
l
Set
Pr.94=155
l
Reset the inverter, the inverter will start tuning process
4.4.2.2 PDAN Sensor-less related parameters
After tuning, these parameters are subject to change according the tuning results:
Pr.09 is general voltage boost value.
Pr.67 is RUN mode selection parameter
If tuning complete, Pr.67 will be set to 3, select Sensor-Less (II) compensation mode.
Pr.68 is special voltage compensation factor
If tuning complete, Pr.68 will be used for Sensor-less voltage compensation.
Pr.69 is special frequency compensation factor
If tuning complete, Pr.69 will be used for Sensor-less compensation
4.4.3 Gain Adjustment
Under conditions when
Tuning Error
occurs, or when fine adjustment is preferred for compensation accuracy,
customer can modify Pr.69 manually by the procedures described follows:
Note: Pr.69 is composed of two factors:
Pr.69 = F1. F2,
separated by decimal point
.
F1: Low speed Phase compensation factor
Set Pr.67=1 and Pr.54=3 (refer to section 13.1), run the inverter at 5% low frequency (e.g. if Pr.10=60Hz, 5%=3Hz),
Read the POWER ANGLE
f
at this frequency,
Then calculate F1 according the following equation:
)
tan(
/
50
1
f
=
F
F2: High-Speed Load regulation factor
Run the motor to desired high frequency (e.g. 60Hz), using tachometer to check the speed variation between no load
and full load, then adjust the gain constant F2 in order to minimize the load regulation.
