Honeywell HVAC400x Applications Manual page 90

HVAC400X – APPLICATION MANUAL
A. Field weakening point voltage.
B. Zero frequency voltage (50...200%).
C. Back EMF.
D. Motor nominal voltage.
P3.1.2.13 I/F START (ID 534)
You can use this parameter to enable the I/f Start function.
This function starts the motor with constant current control. It provides a sufficient torque for the motor at startup.
You can use this function for example with PM-motors.
P3.1.2.14 I/F START FREQUENCY (ID 535)
You can use this parameter to set the output frequency limit below which the set I/f start current is fed to motor.
When the output frequency of the drive is below the limit of this parameter, I/f Start function activates. When the
output frequency is more than the limit, the drive operation mode changes back to the normal U/f control mode.
P3.1.2.15 I/F START CURRENT (ID 536)
You can use this parameter to set the current that is used when the I/f Start function is enabled.
P3.1.2.16 IDENTIFICATION (ID 631)
Used to automatically optimize the U/f curve.
Identification run calculates, measures, and automatically tunes parameters, thus ensuring good motor operation.
Identification run is a tool used to align parameters from the drive to the connected motor and ensure optimized
operation.
EN2B-0417GE51 R0719
U (V)
A
200%
D
E
F
Fig. 11. Adjusting the stator voltage
100%
B
G
Legend
E. Zero frequency voltage.
F. Motor nominal frequency.
G. Field Weakening Point.
90
C
50%
f (Hz)