Power Factor - Danfoss VLT AutomationDrive FC 300 Design Manual

FC 300 Design Guide
How to Read this Design Guide
Set-up:
You can save parameter settings in four set-ups. Change between the four parameter set-ups
and edit one set-up, while another set-up is active.
SFAVM
Switching pattern called S tator F lux oriented A synchronous V ector M odulation (par. 14-00).
Slip Compensation:
The adjustable frequency drive compensates for the motor slip by giving the frequency a
supplement that follows the measured motor load.
Thermistor:
A temperature-dependent resistor placed where the temperature is to be monitored
(adjustable frequency drive or motor).
Trip:
A state which occurs in different situations, i.e. DC link voltage is too high or too low, motor temperature is too
high, etc. A trip can be canceled by pressing reset or, in some cases, be programmed to reset automatically.
Trip Locked:
A state which occurs in different situations, i.e. short circuit of motor terminals, ground fault, etc. A
locked trip can be canceled by cutting off mains and restarting the adjustable frequency drive.
VT Characteristics:
Variable Torque characteristics used for pumps and fans.
VVC plus
plus
If compared with standard voltage/frequency ratio control, Voltage Vector Control (VVC ) improves the
dynamics and the stability, both when the speed reference is changed and in relation to the load torque.
60° AVM
Switching pattern called 60° A synchronous V ector M odulation (par. 14-00).

Power Factor

"
The power factor is the relation between I and I .
1 RMS
The power factor for 3-phase control:
The power factor indicates to what extent
the adjustable frequency drive imposes a
load on the mains supply.
The lower the power factor, the higher the I
RMS
for the same HP/kW performance.
In addition, a high power factor indicates that the different harmonic currents are low.
The FC 300 adjustable frequency drives' built-in DC coils produce a high power factor,
which minimizes the imposed load on the mains supply.
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MG.33.B3.22 - VLT is a registered Danfoss trademark