Danfoss VLT AutomationDrive FC 300 Programming Manual

Also see for VLT AutomationDrive FC 300: Instruction manual Operating instructions Design guide Service manual Operating instructions

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Danfoss VLT AutomationDrive FC 300 Programming Manual Manual pdf 139 page image

3.15 Parameters: 14-** Special Functions3.15.1 14-0* Inverter Switching14-00 Switching PatternOption: Function:[0] * 60 AVM Select the switching pattern: 60° AVM or SFAVM.[1] * SFAVMNOTEThe output frequency value of the frequency converter mustnever exceed 1/10 of the switching frequency. When themotor is running, adjust the switching frequency in4-11 Motor Speed Low Limit [RPM] until the motor is asnoiseless as possible. See also 14-00 Switching Pattern andthe section Special Conditions in the VLT AutomationDriveDesign Guide.14-01 Switching FrequencySelect the inverter switching frequency. Changing the switchingfrequency can help to reduce acoustic noise from the motor.Default depend on power size.Option: Function:[0] 1.0 kHz[1] 1.5 kHz Default switching frequency for355-1200 kW, 690V[2] 2.0 kHz Default switching frequency for250-800 kW, 400V and 37-315kW, 690V[3] 2.5 kHz[4] 3.0 kHz Default switching frequency for18.5-37 kW, 200V and 37-200kW, 400V[5] 3.5 kHz[6] 4.0 kHz Default switching frequency for5.5 – 15kW, 200V and 11-30kW,400V[7] * 5.0 kHz Default switching frequency for0.25 – 3,7kW, 200V and0.37-7.5kW, 400V[8] 6.0 kHz[9] 7.0 kHz[10] 8.0 kHz[11] 10.0 kHz[12] 12.0 kHz[13] 14.0 kHz[14] 16.0 kHzNOTEThe output frequency value of the frequency converter mustnever exceed 1/10 of the switching frequency. When themotor is running, adjust the switching frequency in4-11 Motor Speed Low Limit [RPM] until the motor is asnoiseless as possible. See also 14-00 Switching Pattern andthe section Special conditions in the VLT AutomationDriveDesign Guide.NOTESwitching frequencies higher than 5.0 kHz lead to automaticderating of the maximum output of the frequencyconverter.14-03 OvermodulationOption: Function:[0] Off Select Off [0] for no overmodulation of the outputvoltage, in order to avoid torque ripple on themotor shaft. This feature may be useful forapplications such as grinding machines.[1] * On Select On [1] to enable the overmodulationfunction for the output voltage. This is the rightchoice when it is required that the output voltage ishigher than 95% of the input voltage (typical whenrunning over-synchronously). The output voltage isincreased according to the degree of overmodu-lation.Overmodulation leads to increased torque ripple asharmonics are increased.Control in FLUX mode provides an output current ofup to 98% of the input current, regardless of14-03 Overmodulation.[2] Optimal14-04 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 isachieved by slightly and randomly altering thesynchronism of the pulse width modulated outputphases.14-06 Dead Time CompensationOption: Function:[0] Off No compensation.[1] * On Activates dead time compensation.Parameter Descriptions FC 300 Programming Guide138 MG.33.MB.02 - VLT® is a registered Danfoss trademark33