Sine-Wave Filters - Danfoss VLT AutomationDrive FC 300 Design Manual

Options and Accessories
Step 3
Illustration 9.37 Positioning
Place the frequency converter in the lower bracket, lift the
upper one. When the frequency converter is in place,
lower the upper bracket.
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VLT AutomationDrive FC 300 Design Guide, 0.25-75 kW
Step 4
Illustration 9.38 Tightening of Screws
Now tighten the screws. For extra security, drill and mount
screws in all holes.

9.14 Sine-wave Filters

When a motor is controlled by a frequency converter,
resonance noise will be heard from the motor. This noise,
which is the result of the design of the motor, arises every
time an inverter switch in the frequency converter is
activated. The frequency of the resonance noise thus
corresponds to the switching frequency of the frequency
converter.
For the FC 300, Danfoss can supply a Sine-wave filter to
dampen the acoustic motor noise.
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MG33BE02 - VLT is a registered Danfoss trademark
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