Automatic Energy Optimization (Aeo) - Danfoss VLT AQUA Drive FC 202 Instruction Manual

Commissioning
6. 1-37 d-axis Inductance (Ld)
Enter line to common direct axis inductance of
the PM motor.
If only line-line data are available, divide the line-
line value by 2 to achieve the line-common
(starpoint) value.
7. 1-40 Back EMF at 1000 RPM
Enter line-to-line back EMF of PM Motor at
1000 RPM mechanical speed (RMS value). Back
EMF is the voltage generated by a PM motor
5 5
when no drive is connected and the shaft is
turned externally. Back EMF is normally specified
for nominal motor speed or for 1,000 RPM
measured between two lines. If the value is not
available for a motor speed of
1000 RPM, calculate the correct value as follows:
If back EMF is, e.g., 320 V at 1800 RPM, it can be
calculated at 1000 RPM as follows: Back EMF =
(Voltage / RPM)*1000 = (320/1800)*1000 = 178.
This is the value that must be programmed for
1-40 Back EMF at 1000 RPM.
Test Motor Operation
1. Start the motor at low speed (100 to 200 RPM). If
the motor does not turn, check installation,
general programming and motor data.
2. Check if start function in 1-70 PM Start Mode fits
the application requirements.
Rotor detection
This function is the recommended choice for applications
where the motor starts from standstill, e.g., pumps or
conveyors. On some motors, an acoustic sound is heard
when the impulse is sent out. This does not harm the
motor.
Parking
This function is the recommended choice for applications
where the motor is rotating at slow speed, e.g.,
windmilling in fan applications. 2-06 Parking Current and
2-07 Parking Time can be adjusted. Increase the factory
setting of these parameters for applications with high
inertia.
30
®
VLT AQUA Drive FC 202
Start the motor at nominal speed. If the application does
not run well, check the VVC
dations for different applications can be seen in Table 5.7.
Application
Low inertia applications
I
Load
Low inertia applications
50>I
High inertia applications
I
Load
High load at low speed
<30% (rated speed)
Table 5.7 Recommendations for Different Applications
If the motor starts oscillating at a certain speed, increase
1-14 Damping Gain. Increase the value in small steps.
Depending on the motor, a good value for this parameter
can be 10% or 100% higher than the default value.
Starting torque can be adjusted in 1-66 Min. Current at Low
Speed. 100% provides nominal torque as starting torque.

5.4.5 Automatic Energy Optimization (AEO)

NOTICE!
AEO is not relevant for PM motors.
Automatic Energy Optimization (AEO) is recommended for
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To activate AEO, set parameter 1-03 Torque Characteristics
to [2] Auto Energy Optim. CT or [3] Auto Energy Optim. VT.
Danfoss A/S © 10/2014 All rights reserved.
plus
PM settings. Recommen-
Settings
1-17 Voltage filter time const. to be
/I <5 increased by factor 5 to 10
Motor
1-14 Damping Gain should be
reduced
1-66 Min. Current at Low Speed
should be reduced (<100%)
Keep calculated values
/I >5
Load Motor
1-14 Damping Gain, 1-15 Low Speed
/I > 50 Filter Time Const. and 1-16 High
Motor
Speed Filter Time Const. should be
increased
1-17 Voltage filter time const. should
be increased
1-66 Min. Current at Low Speed
should be increased (>100% for a
prolonged time can overheat the
motor)
Automatic compensation for oversized motors
Automatic compensation for slow system load
change
Automatic compensation for seasonal changes
Automatic compensation for low motor loading
Reduced energy consumption
Reduced motor heating
Reduced motor noise
MG20MA22