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Activ Harmonic Filter (AHF)

The improvement of electric power supply reliability and electric power quality

AHF

Types of equipment:

1. Active compensation of harmonic currents

• Digital control based on Fourier transform table

• Fast response

• Filtering to 49-th harmonics inclusive

• Application: welding machines, induction furnaces, ...

• Fourier transform table displays all of the contents of harmonics in thecurrent

• Possibility of compensation of the individual harmonics level

Application:

constant load, all kinds of drives


2. Active compensation of reactive power 

• Response without delay and without resonance

• Optional

3-phase: VFD, converters, UPS, induction furnaces, welding machines...

 


 

Example of implementation

ACTIVE FILTER FOR CURRENT 30A/50A
ACTIVE FILTER FOR CURRENT OF 100-300A