Vacon NX series Applications Manual page 315

PARAMETER DESCRIPTIONS
J = System inertia (kg*m
f = Motor nominal frequency (Hz)
nom
T = Motor nominal torque
nom
P = Motor nominal power (kW)
nom
627 CL: MAGNETIZING CURRENT AT START 6 (2.6.23.7)
Defines the current that is applied to motor when the start command is given (in Closed Loop
control mode). At start this parameter is used together with parameter ID628 to decrease the
time before the motor is able to produce maximum torque.
628 CL: MAGNETIZING TIME AT START 6 (2.6.23.8)
Defines the time for how long the magnetization current (ID627) is applied to the motor at
start. The magnetizing current at start is used in order to premagnetize the motor before
running. This will improve the torque performance at start. The time needed depends on the
size of the motor. The parameter value varies from 100 ms to 3 seconds. The bigger the
motor the more time is needed.
631 IDENTIFICATION 23456 (2.6.13,2.6.16)
The identification run calculates or measures the motor parameters that are necessary for a
good control of the motor and speed.
The identification run helps you to adjust the motor-specific and the drive-specific
parameters. It is a tool for the commissioning and the servicing of the drive. The goal is to
find the parameter values that are optimal for the operation of the drive.
NOTE!
Before you do the identification run, you have to set the motor nameplate
parameters.
ID110Nominal voltage of the motor (P2.1.6)
ID111Nominal frequency of the motor (P2.1.7)
ID112Nominal speed of the motor (P2.1.8)
ID113Nominal current of the motor (P2.1.9)
ID120Motor cos phi (P2.1.10)
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