Danfoss AKD 5001 Manual

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Danfoss AKD 5001 Manual Manual pdf 53 page image

AKD 5000 Automatic Motor Adaptation, AMAAutomatic motor adaptation is a test algorithmthat measures the electrical motor parameters ata motor standstill. This means that AMA itselfdoes not supply any torque.AMA is useful when commissioning systems, wherethe user wants to optimise the adjustment of thefrequency converter to the motor applied. This featureis used in particular where the factory setting doesnot adequately cover the motor in question.There are two motor parameters that are of primarysignificance in automatic motor adaptation: thestator resistance, Rs, and the reactance at normalmagnetising level, Xs. Parameter 107 allows a choiceof automatic motor adaptation, with determinationof both Rs and Xs, or reduced automatic motoradaptation with determination of only Rs.The duration of a total automatic motor adaptationvaries from a few minutes on small motors to morethan 10 minutes on large motors.Limitations and preconditions:• For AMA to be able to determine the motorparameters optimally, the correct nameplate datafor the motor connected to the frequency convertermust be entered in parameters 102 to 106.• For the best adjustment of the frequencyconverter, it is recommended to carry out AMAon a cold motor. Repeated AMA runs may leadto a heating of the motor that will result in anincrease of the stator resistance, Rs.• AMA can only be carried out if the rated motorcurrent is minimum 35% of the rated outputcurrent of the frequency converter. AMA can becarried out up to one oversize motor.• If a LC filter is inserted between the frequencyconverter and the motor, it will only be possibleto carry out a reduced test. If an overallsetting is required, remove the LC filter whilerunning a total AMA. After completion of theAMA reinsert the LC filter.• If motors are coupled in parallel only usereduced AMA if any.• When using synchronous motors it is onlypossible to make a reduced AMA.• Long motor cables can have an effect on theimplementation of the AMA function if their resistanceis bigger than the stator resistance of the motor.How to perform an AMA1. Press the [STOP/RESET] key2. Set motor nameplate data in parameters 102 to 1063. Select whether a total [ENABLE (RS,XS)]or a reduced[ENABLE RS] AMA is required in parameter 1074. Connect terminal 12 (24 VDC) to terminal27 on the control card5. Press the [START] key or connect terminal18 (start) to terminal 12 (24 VDC) to start theautomatic motor adaptation.Now the automatic motor adaptation goes throughfour tests (for reduced AMA only the first two tests).The different tests can be followed in the display asdots after the text WORKING in parameter 107:1. Initial error check where nameplate data and physicalerrors are checked. Display shows WORKING.2. DC test where the stator resistance is estimated.Display shows WORKING..3. Transient test where the leakage inductance isestimated. Display shows WORKING...4. .AC test where the stator reactance is estimated.Display shows WORKING....NB!:AMA can only be carried out if there areno alarms during tuning.Discontinue AMAIf the automatic motor adaptation is to be discontinued,press the [STOP/RESET] key or disconnectterminal 18 from terminal 12.The automatic motor adaptation ends up with oneof the following messages after the test:Warnings and alarm messagesALARM 21Auto-optimisation OKPress the [STOP/RESET] key or disconnect terminal 18from terminal 12. This alarm indicates that the AMA isOK and that the drive is correctly adapted to the motor.ALARM 22Auto-optimisation not OK[AUTO MOTOR ADAPT OK]A fault has been found during automatic motoradaptation. Press the [STOP/RESET] key or disconnectterminal 18 from terminal 12. Check the possible causeto the fault related to the alarm message given. Thefigure after the text is the error code, which can beseen in the fault log in parameter 615. Automatic motoradaptation does not update parameters. You maychoose to run a reduced automatic motor adaptation.MG.50.R3.02 -52