Control Techniques UNIDRIVE SP1201 Guía Rápida página 35

Safety Product Mechanical
Information Information Installation
Action
Unidrive SP is able to perform either a stationary or a rotating
autotune. The motor must be at a standstill before an autotune is
enabled. A stationary autotune will give moderate performance
whereas a rotating autotune will give improved performance as it
measures the actual values of the motor parameters required by
the drive.
WARNING
• A stationary autotune can be used when the motor is loaded and it
is not possible to uncouple the load from the motor shaft. The
stationary autotune measures the stator resistance and transient
inductance of the motor. These are used to calculate the current
loop gains, and at the end of the test the values in Pr 0.38 and
Autotune
Pr 0.39 are updated. A stationary autotune does not measure the
power factor of the motor so the value on the motor nameplate
must be entered into Pr 0.43.
• A rotating autotune should only be used if the motor is uncoupled.
A rotating autotune first performs a stationary autotune before
rotating the motor at
rotating autotune measures the stator inductance of the motor and
calculates the power factor.
To perform an autotune:
• Set Pr 0.40 = 1 for a stationary autotune or set Pr 0.40 = 2 for a
rotating autotune
• Close the Drive Enable signal (terminal 31). The drive will display
'rdY'
• Close the run signal (terminal 26 or 27). The lower display will
flash 'Auto' and 'tunE' alternatively, while the drive is performing
the autotune.
• Wait for the drive to display 'rdY' and for the motor to come to a
standstill
If the drive trips, see Chapter 9 Diagnostics on page 39.
Remove the run signal from the drive.
Enter 1000 in Pr xx.00
Save
Press the red
parameters
(ensure Pr xx.00 returns to 0)
Run Drive is now ready to run
Unidrive SP Short Form Guide
Issue Number: 1
Electrical Getting
Installation Started
A rotating autotune will cause the motor to accelerate up
to 2 base speed in the direction selected regardless of
/
3
the reference provided. Once complete the motor will
coast to a stop. The run signal must be removed before
the drive can be made to run at the required reference.
The drive can be stopped at any time by removing the run
signal or removing the drive enable.
2
base speed in the direction selected. The
/
3
reset button or toggle the reset digital input
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the motor parameters
Detail
UL Listing
Diagnostics Appendix
Information
∅
cos
R
S
σL
S
L
S
T
saturation
Nm
break-
points
N rpm
35