Group 3.1.4.12: I/f start
The I/f Start function is typically used with permanent
magnet synchronous motors (PMSM) to start the
motor with constant current control. This is useful with
high power motors in which the resistance is low and
the tuning of the U/f curve difficult.
The I/f Start function can be used with induction
motors (IM), too, e.g. if the tuning of the U/f curve is
difficult at low frequencies.
Applying the I/f Start function may also prove useful in
providing sufficient torque for the motor at startup.
9240
I/f star
Pos. Description
1 I/f Start Current
2 Output Frequency
3 I/f Start Frequency
4 Motor Current
5 Time [s]
Code Parameter Min Max Unit Default ID Description
P3.1.4.12.1 I/f start 0 1 0 534
0 = Disabled
1 = Enabled
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