Introduction To The Low Harmonic Drive; Working Principle - Danfoss VLT AQUA Instruction

VLT AQUA Low Harmonic Drive Instruction
Manual

3 Introduction to the Low Harmonic Drive

3.1.1 Working Principle

The VLT Low Harmonic Drive is a VLT High Power adjustable frequency drive with an integrated active filter. An active filter is a device that actively
monitors harmonic distortion levels and injects compensative harmonic current onto the line to cancel out the harmonics.
Figure 3.1: Basic layout for the Low Harmonic Drive
®
MG.20.T1.22 - VLT is a registered Danfoss trademark
3 Introduction to the Low Harmonic Drive
3
3-1