Parker AC30 - Tr Adaptation

D-182 Parameter Reference
AC30 series Variable Speed Drive
Tr Adaptation
Parameters::Motor Control::Tr Adaptation
When the motor control strategy is set to Closed Loop vector, i.e. using encoder feedback, it is important to know the actual value of the rotor time
constant. This value is measured by the autotune, but it will change as the motor temperature changes. The purpose of this module is to track the
changing value of the rotor time constant, and to use all available feedback information to make the best possible estimate of its actual value at any
given time.
Parameter Name
No.
Path
Default
Range
Units
Writable
Actual Rotor T Const
1520
Parameters::Motor Control::Tr
Adaptation
x.
1 to 100000
ms
NEVER
This diagnostic shows the actual value of rotor time constant used by the motor control. This value is the nominal value stored in the
Induction Motor Data, modified by this module to give a value as close as possible to the real value.
Tr Adaptation Output
1521
Parameters::Motor Control::Tr
Adaptation
x.
1 to 500
%
NEVER
This diagnostic shows the factor by which the nominal rotor time constant is multiplied, in order to give the actual rotor time constant
passed to the motor control.
Demanded Terminal Volts
1528
Parameters::Motor Control::Tr
Adaptation
x.
0 to 1000
V
NEVER
In order to maintain constant flux for a given load, the motor terminal volts must be controlled. This diagnostic gives the terminal volts
demand used by the control loop.
Terminal Volts
1529
Parameters::Motor Control::Tr
Adaptation
x.
0 to 1000
V
NEVER
This diagnostic shows motor terminal volts. It is included here for convenience, to compare with the demanded terminal volts to make
sure that the terminal volts control loop is able to close the loop to the demanded value.