Activ Harmonic Filter (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
constant load, all kinds of drives
2. Active compensation of reactive power
• Response without delay and without resonance
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