Control Techniques COMMANDER SE, Руководство для продвинутых пользователей

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Commander SE Advanced User Guide
45
Issue Number: 4
The power factor is used in conjunction with the motor rated current parameter 5.07 to calculate the rated active current.
Enter this from the nameplate of the motor. When a rotating autotune is carried out by the drive, the calculated power factor is
automatically saved by the drive.
*Units: poles (by text), pole pairs (by number)
When Auto is selected, the drive automatically calculates the number of motor poles of the machine from the settings in
parameters
5.08 and 5.06 . If either of these parameters are adjusted for a special motor or to modify the V/f characteristic,
the automatic calculation may calculate the number of motor poles incorrectly. This would cause an incorrect slip
compensation to be applied and the rpm speed indication would be incorrect. Therefore, the correct number of motor poles
should be programmed manually.
0 no autotune
1 non-rotating static autotune
2 rotating autotune
There are two levels of autotune that can be performed by the Commander SE.
Non-rotating static autotune
This autotune measures the motor stator resistance and system voltage offset. The results of the test are stored in the
appropriate parameters. After the test is carried out, the motor will run as requested.
The motor must be at standstill before this test is initiated.
Rotating autotune
The drive will always carry out a rotating autotune on the motor in the forward direction of motor rotation even if the run
reverse command is given to initiate the autotune routine.
In addition to the stator resistance and system voltage offset, the rated magnetising current and total system leakage
inductance are measured. The motor is accelerated up to
2
/
3
rated speed in the forward direction of motor rotation to measure
the rated magnetising current. The speed will be less if insufficient DC Bus voltage is available to operate at
2
/
3
rated speed
without field weakening. After this autotune has been carried out, the run forward or run reverse terminal will need to be
opened and closed to allow the motor to run.
The stator resistance and voltage offset are stored in their appropriate parameters. The rated magnetising current and total
system leakage inductance are used to set up the motor rated power factor (parameter
5.10 ).
The motor must be at standstill before this test is initiated.
The main advantage of carrying out a rotating autotune over a non-rotating autotune is that the drive calculates the correct
power factor, rated torque current and magnetising current for the motor. This will give more accurate slip compensation (if
enabled).
5.10 Motor rated power factor
Ú
0 ~ 1.00
Ö
0.85 RW Uni
5.11 No of motor poles
Ú
Auto, 2P ~ 8P (0 ~ 4)
Ö
Auto(0)
*
RW Uni Txt
Poles by text
(Value on display)
Pole pairs (Value
through serial comms)
Auto 0
2P 1
4P 2
6P 3
8P 4
5.12 Autotune
Ú
0 ~ 2
Ö
0 RW Uni
NOTE
NOTE