Powerîš‹factorîš‹ =
I
1
 × cosϕ1
I
RMS
îš‹ = îš‹
I
1
I
RMS
sincecosϕ1 = 1
The power factor indicates to which extent the drive imposes a load on the
mains supply.
The lower the power factor, the higher the I
RMS
for the same kW perform-
ance.
I
RMS
îš‹ = îš‹ I
1
2
îš‹ + îš‹I
5
2
îš‹ + îš‹I
7
2
îš‹ + îš‹..îš‹ + îš‹I
n
2
In addition, a high-power factor indicates that the different harmonic cur-
rents are low.
The DC coils in the drive produce a high-power factor, which minimizes the
imposed load on the mains supply.
A defined preset reference to be set from -100% to +100% of the reference
range. Selection of 8 preset references via the digital terminals.
The PID control maintains the required speed, pressure, temperature, and
so on, by adjusting the output frequency to match the varying load.
Pulse input/incremental encoder
An external, digital pulse transmitter used for feeding back information on
motor speed. The encoder is used in applications where great accuracy in
speed control is required.
A pulse frequency signal transmitted to the digital inputs (terminal 29 or
33).
R
Determines the relationship between the reference input at 100-% full scale
value (typically 10 V, 20 mA) and the resulting reference. The maximum ref-
erence value is set in parameter 3-03 Maximum Reference.
Determines the relationship between the reference input at 0-% value (typi-
cally 0 V, 0 mA, 4 mA) and the resulting reference. The minimum reference
value is set in parameter 3-02 Minimum Reference.
S
Switching pattern called stator flux-oriented asynchronous vector modula-
tion (parameter 14-00 Switching Pattern).
The SLC (smart logic control) is a sequence of user-defined actions execu-
ted when the associated user-defined events are evaluated as true by the
SLC. (See parameter group 13-** Smart Logic Control).
The STO function brings the drive safely to a no-torque state.
Save parameter settings in 4 setups. Change between the 4 parameter set-
ups and edit 1 setup, while another setup is active.
The drive compensates for the motor slip by giving the frequency a supple-
ment that follows the measured motor load keeping the motor speed al-
most constant.
A start command belonging to Group 2 control commands, see the table
Function Groups under Control Command.
A stop command belonging to Group 1 control commands, see the table
Function Groups under Control Command.
AU275636650261en-000101/130R0334720 | Danfoss A/S © 2022.12
Glossary
VLT AutomationDrive FC 301/302
Programming Guide
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