Danfoss VLT FC 103 Programming Manual

Also see for VLT FC 103: Service guide Installation guide Installation guide Operating guide Installation guide

Contents

Danfoss VLT FC 103 Programming Manual Manual pdf 94 page image

3.11 Main Menu - Special Functions - Group143.11.1 14-** Special FunctionsParameter group for configuring special frequencyconverter functions.3.11.2 14-0* Inverter Switching14-00 Switching PatternOption: Function:Select the switching pattern: 60° AVM or SFAVM.[0] * 60 AVM[1] SFAVM14-01 Switching FrequencyOption: Function:Select the inverter switching frequency. Changingthe switching frequency can help to reduceacoustic noise from the motor.NOTEThe output frequency value of thefrequency converter must never exceed 1/10of the switching frequency. When the motoris running, adjust the switching frequency in14-01 Switching Frequency until the motor isas noiseless as possible. See also14-00 Switching Pattern and the sectionDerating.[0] 1.0 kHz[1] 1.5 kHz[2] 2.0 kHz[3] 2.5 kHz[4] 3.0 kHz[5] 3.5 kHz[6] 4.0 kHz[7] * 5.0 kHz[8] 6.0 kHz[9] 7.0 kHz[10] 8.0 kHz[11] 10.0 kHz[12] 12.0kHz[13] 14.0 kHz[14] 16.0kHzNOTEEnabling over-modulation can cause vibrations that maydestroy the mechanics if running in field weakening ares(from 47 Hz).14-03 OvermodulationOption: Function:[0] Off Selects no over-modulation of the output voltage inorder to avoid torque ripple on the motor shaft.[1] * On The over-modulation function generates an extravoltage of up-to 8% of Umax output voltage withoutover-modulation, which results in an extra torque of10-12% in the middle of the over-syncronous range(from 0% at nominal speed rising to approximately12% at double nominal speed).14-04 PWM RandomOption: Function:[0] * Off No change of the acoustic motor switching noise.[1] On Transforms the acoustic motor switching noise from aclear ringing tone to a less noticeable ‘white’ noise.This is achieved by slightly and randomly altering thesynchronism of the pulse width modulated outputphases.3.11.3 14-1* Mains On/OffParameters for configuring mains failure monitoring andhandling.14-12 Function at Mains ImbalanceOption: Function:Operation under severe main imbalanceconditions reduces the lifetime of the motor.Conditions are considered severe if the motor isoperated continuously near nominal load (e.g. apump or fan running near full speed).When a severe mains imbalance is detected:[0] * Trip Select [0] Trip to trip the frequency converter.[1] Warning Select [1] Warning to issue a warning.[2] Disabled Select [2] Disabled for no action.[3] Derate Select [3] Derate for derating the frequencyconverter.Parameters for configuring auto reset handling, special triphandling and control card self test or initialisation.14-20 Reset ModeSelect the reset function after tripping. Once reset, the frequencyconverter can be restarted.Option: Function:[0] * Manual reset Select [0] Manual reset, to performa reset via [Reset] or via thedigital inputs.[1] Automatic reset x 1 Select [1]-[12] Automatic reset x1…x20 to perform between oneand twenty automatic resets aftertripping.[2] Automatic reset x 2Parameter Description VLT® Refrigeration Drive Programming GuideMG16H102 - VLT® is a registered Danfoss trademark 933 3