Danfoss vlt FC 102 Operating Guide

b.
- c.
- d.
- e.
- f.
1.
2.
3.
•
•
•
•
Parameter 1-31 Rotor Resistance (Rr).
Parameter 1-33 Stator Leakage Reactance (X1).
Parameter 1-34 Rotor Leakage Reactance (X2).
Parameter 1-35 Main Reactance (Xh).
Parameter 1-36 Iron Loss Resistance (Rfe).
5.3.3.1 Application-specific Adjustment when Running VVC+
VVC+ is the most robust control mode. In most situations, it provides optimum performance without further adjustments. Run a
complete AMA for best performance.
5.3.3.2 Application-specific Adjustment when Running Flux
Flux control principle is the preferred control principle for optimum shaft performance in dynamic applications. Perform an AMA
since this control mode requires precise motor data. Depending on the application, further adjustments may be required.
Table 17: Recommendations for Flux Applications
Application
Settings
Low-inertia appli-
cations
Keep calculated values.
High-inertia appli-
cations
Parameter 1-66 Min. Current at Low Speed
Increase current to a value between default and maximum depending on the application.
Set ramp times matching the application. Too fast ramp up causes an overcurrent or overtorque. Too
fast ramp down causes an overvoltage trip.
High load at low
speed
Parameter 1-66 Min. Current at Low Speed. Increase current to a value between default and maximum de-
pending on the application.
No-load applica-
tion
Adjust parameter 1-18 Min. Current at No Load to achieve smoother motor operation by reducing torque
ripple and vibration.
Flux sensorless
control principle
only
Adjust Parameter 1-53 Model Shift Frequency.
Example 1: If the motor oscillates at 5 Hz, and dynamics performance is required at 15 Hz, set parame-
ter 1-53 Model Shift Frequency to 10 Hz.
Example 2: If the application involves dynamic load changes at low speed, reduce parameter 1-53 Mod-
el Shift Frequency. Observe the motor behavior to make sure that the model shift frequency is not re-
duced too much. Symptoms of inappropriate model shift frequency are motor oscillations or drive trip-
ping.
5.3.4 Permanent Magnet Motor Set-up
N O T I C E
Only use permanent magnet (PM) motors in fan and pumps applications.
5.3.4.1 Initial Programming
Procedure
Activate PM motor operation in parameter 1-10 Motor Construction.
Select [1] PM, non-salient SPM.
Set parameter 0-02 Motor Speed Unit to [0] RPM.
AQ267037536117en-000101 / 130R0083 | 43Danfoss A/S © 2023.09
Commissioning
VLT HVAC Drive FC 102
Operating Guide

Danfoss vlt FC 102 Specifications

General

Brand	Danfoss
Model	vlt FC 102
Category	DC Drives
Language	English