Danfoss 102 Instructions d'exploitation télécharger pdf (Page 28)

Start the motor at nominal speed. If the application does

not run well, check the VVC

plus

PM settings. Recommen-

dations in different applications can be seen in Table 5.6.

Application Settings

Low inertia applications

Load

Motor

1-17 Voltage filter time const. to be

increased by factor 5 to 10

1-14 Damping Gain should be

reduced

1-66 Min. Current at Low Speed

should be reduced (<100%)

Low inertia applications

50>I

Load

Motor

Keep calculated values

High inertia applications

Load

Motor

> 50

1-14 Damping Gain, 1-15 Low Speed

Filter Time Const. and 1-16 High

Speed Filter Time Const. should be

increased

High load at low speed

<30% (rated speed)

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)

Table 5.6 Recommendations in 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 permanent magnet motors.

Automatic Energy Optimization (AEO) is recommended for

•

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

To activate AEO, set parameter 1-03 Torque Characteristics

to [2] Auto Energy Optim. CT or [3] Auto Energy Optim. VT.

5.4.6

Automatic Motor Adaptation (AMA)

NOTICE

AMA is not relevant for permanent magnet motors.

Automatic motor adaptation (AMA) is a procedure that

optimizes compatibility between the frequency converter

and the motor.

•

The frequency converter builds a mathematical

model of the motor for regulating output motor

current. The procedure also tests the input phase

balance of electrical power. It compares the

motor characteristics with the data entered in

parameters 1-20 to 1-25

•

The motor shaft does not turn and no harm is

done to the motor while running the AMA

•

Some motors may be unable to run the complete

version of the test. In that case, select [2] Enable

reduced AMA

•

If an output filter is connected to the motor,

select Enable reduced AMA

•

If warnings or alarms occur, see 7.3 List of

Warnings and Alarms

•

Run this procedure on a cold motor for best

results

To run AMA

1. Press [Main Menu] to access parameters.

Scroll to parameter group 1-** Load and Motor

and press [OK].

Scroll to parameter group 1-2* Motor Data and

press [OK].

Scroll to 1-29 Automatic Motor Adaptation (AMA)

and press [OK].

Select [1] Enable complete AMA and press [OK].

6. Follow on-screen instructions.

7. The test will run automatically and indicate when

it is complete.

Commissioning

VLT

HVAC Drive Operating Instructions

26 MG11AJ02 - Rev. 2013-07-31

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Danfoss 102 Instructions d'exploitation Page 28

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