Rfc-S Sensorless; Permanent Magnet Motor Without Position Feedback - Emerson Powerdrive F300 User Manual

Safety Product Mechanical
information information installation
7.3.3

RFC-S Sensorless

Permanent magnet motor without position feedback

Action
Ensure:
Before • The drive enable signal is not given (terminal 29).
power-up • Run signal is not given
• Motor is connected
Verify that RFC-S mode is displayed as the drive powers up. If the mode is incorrect see Chapter
5.6 Changing the operating mode on page 108, otherwise restore parameter defaults (see Chapter
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:
Enter motor
• Motor rated current in Pr 00.046 (A)
nameplate
• Number of poles in Pr 00.042
details
• Motor rated voltage in Pr 00.044 (V)
Set
Enter:
maximum
• Maximum speed in Pr 00.002 (rpm)
speed
Set
Enter:
acceleration /
• Acceleration rate in Pr 00.003 (s to Pr 01.006)
deceleration
• Deceleration rate in Pr 00.004
rates
The drive is able to perform a stationary autotune. The motor must be at a standstill before an autotune is
enabled. A stationary autotune will give moderate performance.
• A stationary autotune is performed to locate the flux axis of the motor. The stationary autotune measures
the stator resistance, inductance in flux axis, inductance in torque axis with no load on the motor and
values relating to deadtime compensation from the drive. Measured 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.
To perform an autotune:
Autotune
• Set Pr 00.040 = 1 or 2 for a stationary autotune. (Both perform the same tests).
• Close the run signal (terminal 24).
• Close the drive enable signal (terminal 29). The upper row of the display will flash 'Auto Tune' while the
drive is performing the test.
• Wait for the drive to display 'Inhibit'.
If the drive trips it cannot be reset until the drive enable signal (terminal 29) has been removed. See Chapter
13 Diagnostics on page 260.
• Remove the drive enabled and run signal from the drive.
In sensorless mode, when the motor speed is below Pr 00.045 / 10, a special low speed algorithm must be
used to control the motor. There are two modes available, with the mode chosen based on the saliency of the
motor.
Check
The ratio No-load Lq (Pr 00.056) / Ld (Pr 05.024) provides a measure of the saliency. If this value is > 1.1,
Saliency
then injection (0) mode may be used (this is the default). Non-salient (1) mode may be used (but with
limitations). If this value is < 1.1, then Non-salient (1) mode must be used.
Set Pr 00.054 for the selected mode: Injection (0) or Non-salient (1).
Save
Select 'Save Parameters' in Pr mm.000 (alternatively enter a value of 1000 in Pr mm.000) and press red
parameters
reset button or toggle the reset digital input.
Run Drive is now ready to run
Powerdrive F300 User Guide
Issue Number: 2
Electrical Getting Basic
installation started parameters the motor
Running NV Media Card
Optimization
Operation
Detail
Onboard Advanced Technical
Diagnostics
PLC parameters data
1000rpm
UL listing
information
Model No: 95UXXXXXXXXXXXX Brake: 12Nm
Volts: 380/480 24V
Cont: 7.7Nm:4.81Arms 0.67A
Stall: 9.5Nm:5.91Arms
Speed: 3000rpm Poles:6
Control Techniques
Kt: 1.6Nm/Arms Dynamics Ltd
Ins Class: H
ANDOVER, HANTS.
ENGLAND. SP10 5AB
Serial No: XXXXXXXXXXX
0.02
t
t
0.03 0.04
R
S
Ef
Ld
No-load Lq
141