Rfc - A Sensorless; Induction Motor Without Position Feedback - Emerson Powerdrive F300 User Manual

Safety Product Mechanical
information information installation
7.3.2

RFC - A Sensorless

Induction motor without position feedback

Action
Ensure:
Before power-
• The drive enable signal is not given (terminal 29)
up
• Run signal is not given
• Motor is connected
Verify that RFC-A mode is displayed as the drive powers up. If the mode is incorrect see section
5.6 Changing the operating mode on page 108, otherwise restore parameter defaults (See section
Power-up the 5.8 Restoring parameter defaults on page 109.
drive Ensure:
• Drive displays 'Inhibit'
If the drive trips, see Chapter 13 Diagnostics on page 260.
Enter:
• Motor rated frequency in Pr 00.047 (Hz)
Enter motor
• Motor rated current in Pr 00.046 (A)
nameplate
• Motor rated speed in Pr 00.045 (rpm)
details
• Motor rated voltage in Pr 00.044 (V) - check if
Set maximum Enter:
speed • Maximum speed in Pr 00.002 (rpm)
Set acceleration Enter:
/ deceleration • Acceleration rate in Pr 00.003 (s to Pr 01.006)
rates • Deceleration rate in Pr 00.004
The drive 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.
NOTE
A rotating autotune will cause the motor to accelerate up to
selected 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
• 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 and values relating to deadtime compensation from the drive. Measured
Autotune
values are used to calculate the current loop gains, and at the end of the test the values in
Pr 00.038 and Pr 00.039 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 00.043.
• 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 2/3 base speed in the direction selected. The
rotating autotune measures the stator inductance of the motor and calculates the power factor.
To perform an autotune:
• Set Pr 00.040 = 1 for a stationary autotune or set Pr 00.040 = 2 for a rotating autotune
• Close the drive enable signal (terminal 29). The drive will display 'Inhibit'.
• Close the run signal (terminal 24). The lower display will flash 'Autotune' while the drive is
performing the autotune.
• Wait for the drive to display 'Inhibit' and for the motor to come to a standstill.
If the drive trips, see Chapter 13 Diagnostics on page 260.
• Remove the drive enable and run signal from the drive.
Select 'Save Parameters' in Pr mm.000 (alternatively enter a value of 1000 in Pr mm.000) and press red
Save
parameters
reset button or toggle the reset digital input.
Run Drive is now ready to run
140
Electrical Getting Basic
installation started parameters
It is highly recommended that a rotating autotune is performed (Pr 00.040 set to 2).
Running NV Media Card
Optimization
the motor Operation
Detail
or connection
2
/ base speed in the direction
3
Onboard Advanced Technical
Diagnostics
PLC parameters data
0.02
1000rpm
R
S
σL
S
L
S
T
Nm
Powerdrive F300 User Guide
UL listing
information
Mot X XXXXXXXXX
No XXXXXXXXXX kg
IP55 I.cl F ° C 40 s S1
V Hz min -1 kW cosφ A
230 50 1445 2.20 0.80 8.50
400 4.90
CN = 14.5Nm
240 50 1445 2.20 0.76 8.50
415 4.90
CN = 14.4Nm
CTP- VEN 1PHASE 1=0,46A P=110W R.F 32MN
t
t
0.03 0.04
cos ∅
saturation
break-
points
N rpm
Issue Number: 2