Parker AC890PX Series, Инженерный справочник

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A p p e n d i x D : P r o g r a m m i n g
AC890PX AC Drive
Speed Loop Autotune (MODE = 2 or 3)
For these additional tests, the motor is connected to the load.
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The Stationary autotune will calculate the speed loop gains without rotating the motor. You must know the total inertia of
the system and enter it into the TOTAL INERTIA parameter in the MOTOR INDUCTION function block.
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The Rotating autotune applies a sequence of torque steps to the motor and load to determine the total inertia of the system.
This value is entered into the TOTAL INERTIA parameter in the MOTOR INDUCTION function block.
The maximum speed and torque that can be reached during this test is set by the SPD MAX SPEED and SPD MAX
TORQUE parameters.
The value of total inertia, together with SPD LOOP BNDWDTH, is then used to calculate values for the SPEED PROP
GAIN and SPEED INT TIME parameters in the SPEED LOOP function block. The model used to calculate this is a
simple 2nd order closed-loop system with critical damping.
The maximum value of SPEED PROP GAIN is limited to a value of 20.00 in Sensorless Vector mode. In Closed-Loop
Vector mode, it is limited such that the torque ripple due to encoder quantisations is less than 10%. If either of these limits is
reached, then the SPD LOOP BNDWDTH parameter is re-calculated. After the test, this parameter will display the bandwidth
achieved.