4-248
■ Motor excitation current (17-09)
a) Only the static-type or stator resistance measurement auto-tuning (17-00=1 or 17-00=2) can be
set. This data can be obtained by manual tuning. Normally, it does not require adjusting.
b) Motor excitation current is used for non-rotational auto-tuning.
c) The setting range of motor excitation current is 15%~70% of the motor rated current.
d) If this parameter is not set, the inverter calculates the motor related parameters.
■ Automatic tuning start (17-10)
Set parameter 17-10 to 1 and press ENTER the inverter will display “Atrdy” for Auto-tune ready. Next,
press RUN key to start the auto-tune procedure. During auto-tuning the keypad will display “Atune “for
Auto-tune in progress. When the motor is successfully tuned, the keypad shows "AtEnd".
■ Error history of automatic tuning (17-11)
If auto-tuning fails the keypad will display the AtErr" message and the auto-tune cause is shown in
parameter 17-11. Refer to section 5 for troubleshooting and possible automatic tuning error causes.
Note: The motor tuning error history (17-11) shows the tuning result of the last auto-tune. No error is
displayed when auto-tune is aborted or when the last auto-tune was successful.
■ Motor Leakage Inductance Ratio (17-12)
a) Only stator resistance measurement auto-tuning (17-00=2) can be set and this data can be
obtained by manual tuning. Normally, it does not require adjustment.
b) It is mainly for non-rotational auto-tuning. The default setting is 3.4%. It is required to tune to make
the adjusted parameter value saved into the group 02-33.
c) If this parameter is not set, the inverter calculates the motor related parameters.
■ Motor Slip Frequency (17-13)
a) Only stator resistance measurement auto-tuning (17-00=2) can be set and this data can be
obtained by manual tuning. Normally, it does not require adjustment.
b) It is mainly for non-rotational auto-tuning. The default setting is 1Hz. It is required to tune to make
the adjusted parameter value saved into the group 02-34.
c) If this parameter is not set, the inverter calculates the motor related parameters.
Notes:
- Perform the “Stator resistance measurement” (17-00=2) auto-tune if the inverter/motor leads are
longer than 167ft (50m).
- For the best performance in vector control perform the rotary-type automatic tune (17-00=0) first
(using short motor leads between the inverter and motor) and a “Stator resistance measurement”
(17-00=2) next.
- If a rotary auto-tune (17-00=0) cannot be performed, manually enter the mutual induction (02-18),
excitation current (02-09), core saturation compensation factor 1-3 (02-11 - 02-13).
- Perform the “Stator resistance measurement” (17-00=2) in V/F control when inverter/motor leads are
longer than 167ft (50m).
■ Rotational Tuning Mode Selection (17-14)
It is only enabled in rotation auto-tuning (17-00=0) and rotational auto-tuning combination (17-00=5).
17-14=0,
Under VF control mode, no-loading can drive general standard induction motors without oscillation.
And it is the most widely used mode.
Note: If VF mode rotational tuning is failed, try Vector mode rotational tuning to run again.
To Next Page
Loading...
