Emerson MP25A4 User Manual page 74

Mentor mp series high performance dc drive 25a to 7400a, 480v to 690v two or four quadrant operation
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Safety
Product
Mechanical
Information
information
Installation
Action
Mentor MP is able to perform either a static, rotating or continuous autotune. The motor must be at a standstill
before an autotune is enabled.
Static autotune for current loop gains
When this operation is performed the drive will perform an estimation of Motor constant (Pr 5.15), Continuous
proportional gain (Pr 4.13), Continuous integral gain (Pr 4.14), Discontinuous integral gain (Pr 4.34), Back
EMF set point (Pr 5.59), Armature resistance (Pr 5.61) and Flux loop I gain (Pr 5.72) with respect to the
selected motor map and store the values.
Static autotune
To perform a static autotune:
Set Pr 5.12 (SE13, 0.34)= 1
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
Remove the enable signal when the autotune has finished
Remove the run signal
Close the enable signal. Close the run signal (terminal 26 or 27). Provide speed reference to run the drive
up to a low speed, the drive will regulate its own estimated speed.
Check that the feedback device is functioning correctly:
For encoder speed feedback - Check encoder speed feedback
For tachometer speed feedback - Check tachometer speed feedback
Checking speed
feedback
When the feedback device being used is seen to be functioning correctly, stop the drive and select the
correct feedback device using Pr 3.26 (Fb01, Pr 0.71)
NOTE
For improved estimated speed accuracy and torque control in the field weakening range a rotating autotune is
recommended to determine the motor flux characteristics Pr 5.12 (SE13, 0.34) = 2
Mentor MP is able to perform either a static, rotating or continuous autotune. The motor must be at a standstill
before an autotune is enabled.
NOTE
A rotating autotune cannot be carried out in Estimated speed mode.
A rotating autotune will cause the motor to accelerate up to
regardless of the reference provided. Once complete the motor will coast to a stop. The enable
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.
WARNING
Rotating autotune for motor field flux set-up
Rotating
When selected the drive will determine the rated field compensation factor (Pr 5.74) for rated flux and the
autotune
motor field winding saturation break-points (Pr 5.29 and Pr 5.30), by spinning the motor at 25% of its base
speed (Pr 5.08) with respect to the selected motor map and store the values.
To perform an autotune:
Set Pr 5.12 (SE13, 0.34) = 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 'inh' and for the motor to come to a standstill
If the drive trips, see Chapter 13 Diagnostics on page 167.
Remove the drive enable and run signal from the drive.
Select SAVE in Pr xx.00 (SE00, 0.21)
Save parameters
Press the red
Drive is now ready to run
Close enable signal
Run
Close run signal
Provide speed reference
74
Electrical
Getting
Basic
installation
started
parameters
reset button or toggle the reset digital input (ensure Pr xx.00 (SE00, 0.21) returns to 'no Act').
www.controltechniques.com
Running
SMARTCARD
Optimization
the motor
operation
Detail
Pr 3.27 (Fb09, 0.79).
Pr 3.52 (Fb04, 0.74).
1
/
base speed in the direction selected
4
Onboard
Advanced
Technical
Diagnostics
PLC
parameters
data
Mentor MP User Guide
UL
information
Issue: 3

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