BENSHAW RSi SG Series, Инструкция по эксплуатации

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Chapter 6 - Parameter Description [AFN]
6-33
▣ The drive should only use one set of motor
parameters. The drive should not be set to use the
second set of motor parameters.
▣
For best performance, the auto tuning feature in
AFN-61 should be used.
▣ Set the appropriate values for the overload limit
function and the stall prevention. The values set should
exceed 100% of the rated motor current.
▣
When using analog signals to control the speed of
the drive, the wires should be shielded and installed to
reduce electrical interference.
▣ The number of motor poles should be 2, 4 or 6.
▣ The distance between the drive and the motor should
not exceed 100m (328 ft).
CAUTIONS WHEN USING SENSORLESS VECTOR
CONTROL
▣
Forced-cooling should be used for the motor when
the average operating speed is under 20Hz and more
than 100% load is applied.
▣ The motor may rotate 0.5% faster than the maximum
speed under light loads or if the motor temperature
does not reach normal operating temperature.
▣
Use the auto-tuning feature when the motor is at
normal temperature (average temperature where the
motor normally operates).
▣ The output torque may be reduced when an output
filter option is used between the drive and the motor.
▣ Overcurrent trips may occur if AFN-62 [Stator
resistance] is set to more than double the auto-tuned
value.
Additional Tuning for Sensorless Vector Control
▣ Adjust the AFN–44 [No Load Motor Current
(RMS)] value larger or smaller by 5% if the measured
current is higher or lower than that of V/F control when
under a light load.
▣
Adjust the AFN–42 [Rated Motor Slip] value larger
or smaller by 5% if the actual speed is faster or slower
than that of V/F control with rated load.
AFN-61~63: Auto tuning
All of the motor parameters can be tuned by setting
AFN-61 to “YES”. Auto tuning is deactivated when
“No” is selected.
The auto tuning function automatically measures the
motor parameters needed for Sensorless Vector control
and Auto Torque Boost such as stator resistance, rotor
resistance, leakage inductance and no-load current.
Note: The rated current, voltage, efficiency and slip
described in the motor nameplate should be entered
before performing auto tuning. If efficiency is not
indicated on the nameplate, use the default value.
These parameters display default settings based on
motor horse power, set with parameter AFN-40. When
Sensorless Vector control is selected in AFN-60, and
Auto tuning is performed with AFN-61, the values
detected during auto tuning are displayed.
AFN ► Auto tuning
61 NO
Factory Default:
NO
AFN ► Stator Resistance
62 Rs
AFN ► Leakage Inductance
63 L
s