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Diagnostics Optimization CT MODBUS RTU Technical Data
E300 Design Guide 157
Issue Number: 1
Open loop Rotating autotune: Basic control and improved performance
Stage 1 of the Rotating autotune is to carry out the Static autotune in Open loop as described in section 7.3.1 Static Autotune .
Stage 2 a rotating autotune test is performed in which the motor is accelerated with the selected ramps up to a frequency of A21 Motor Rated
Frequency B06) x 2/3, and the frequency is maintained at that level for 4 seconds. Stator Inductance (B35) is measured and this value is used in
conjunction with other motor parameters to calculate Motor Rated Power Factor (B04).
Table 7-7 lists the parameters required for Open loop motor control indicating which should be set by the user and which can be measured with an
autotune.
Table 7-7 Open loop rotating autotune parameters
RFC- A Rotating autotune: Basic control and improved performance
This test measures the parameters for improved performance by rotating the motor.
Stage 1 of the Rotating autotune is to carry out the Static autotune in RFC-A, refer to section 7.3.1 Static Autotune on page 151.
Stage 2 a rotating autotune test is performed in which the motor is accelerated with the selected ramps up to a frequency of A21 (Motor Rated
Frequency B06) x
2
/
3
, and the frequency is maintained at that level for 40 seconds. The Stator Inductance (B35) is measured, and this value is used
in conjunction with other motor parameters to calculate the Motor rated power factor.
The motor should be unloaded for this test. Table 7-8 lists the parameters required for RFC-A motor control indicating which should be set by the user
and which can be measured with an autotune.
Table 7-8 RFC-A rotating autotune parameters
Parameter Required for Detail
A21 (Motor Rated Frequency B06)
Basic control
Motor nameplate
A18 (Motor Rated Current B02)
A22 (Motor Rated Speed B07) Slip compensation
A19 (Motor Rated Voltage B03) Basic control
Motor Rated Power Factor (B04) Not used
A20 (Number Of Motor Poles B05) Basic control
Stator Resistance (B34)
Basic control Ur S (0) Ur (1), Ur Auto (3), Ur I (4)
modes
Manually enter, Static or rotating
autotune
Transient Inductance (B33) Improved performance
Static or rotating autotuneMaximum Deadtime Compensation (B46)
Basic control
Current At Maximum Deadtime Compensation (B47)
Parameter Required for Measured in test
A21 (Motor Rated Frequency B06)
Basic control
Motor nameplate
A18 (Motor Rated Current B02)
A22 (Motor Rated Speed B07) Slip compensation
A19 (Motor Rated Voltage B03) Basic control
Motor Rated Power Factor (B04) Not used Rotating autotune
A20 (Number Of Motor Poles B05) Basic control Motor nameplate
Stator Resistance
(B34)
U
r S (0) Ur (1), Ur Auto (3), Ur I (4) modes
Static or rotating autotune
Stator Resistance (B34)
Improved performance
Transient Inductance (B33) Rotating autotune
Maximum Deadtime Compensation (B46)
Basic control
Static or rotating autotune
Current At Maximum Deadtime Compensation (B47)
Start Current Loop P Gain (I03)
Run Current Loop P Gain (I08)
Stop Current Loop P Gain (I13)
Static or rotating autotune
Start Current Loop I Gain (I04)
Run Current Loop I Gain (I09)
Stop Current Loop I Gain (I14)
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