Danfoss vlt aqua - Introduction to the Low Harmonic Drive; Working Principle

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
VLT AQUA Low Harmonic Drive Instruction
Manual
3 Introduction to the Low Harmonic Drive
MG.20.T1.22 - VLT
®
is a registered Danfoss trademark 3-1
3