Technical knowledge
Aktive Filter
Functionality and Application
Active filters are able to dynamically adapt to changing load conditions. They can compensate for different electrical parameters in real time, making them particularly effective in applications with varying loads.
Active filters are devices designed to
- Harmonic distortions
- Resonances
- Flicker
- Reactive power compensation (PFC) inductive / capacitive
- Asymmetry
in electrical systems.
Active harmonic filters are particularly useful in industrial applications where nonlinear loads such as frequency converters, switching power supplies and other electronic devices often generate harmonic distortion. They provide a flexible and effective solution for improving power quality in electrical systems.
Use of Active Filters:
The active control means that these filters have an extremely wide range of applications.
In contrast to passive filters, overloading is not possible.
Our active filters are used worldwide in these industries and application areas:
- Automotive industry
- Hospitals
- Paper industry
- Steel and metal industry
- Data centers
- TV stations
- Semiconductor industry
- Administrative buildings
- Research institutes
- National defense / military
- Hydrogen electrolysis plants
- Airports
- Marine / maritime economy
- Oil and gas industry
- Mining
- Food industry
- Chemical industry
What is Power Quality?
Power Quality refers to the characteristics of the electrical energy delivered to consumers and describes how well that energy meets the needs of the connected equipment.
High power quality means that the electrical energy is stable, reliable and free from interference, while low power quality can lead to problems such as overheating, failures or inefficient operation of electrical equipment.
Important aspects of power quality are:
1. Voltage quality: This includes parameters such as voltage levels, fluctuations, distortions and interruptions. A stable voltage is crucial for the proper operation of equipment.
2. Frequency: The frequency of the current should be constant (50 Hz or 60 Hz in many countries). Deviations can lead to malfunctions.
3. Harmonic distortion: This is caused by non-linear loads that generate additional frequencies that deviate from the fundamental frequency. High harmonic distortion can reduce the efficiency of equipment and lead to overheating.
4. Unbalance: In three-phase systems, uneven distribution of loads can lead to voltage and current unbalance, which can affect the performance and lifespan of equipment.
5. Transients: Sudden voltage spikes or drops caused by switching operations or lightning strikes can also affect power quality.
Good power quality is crucial for the efficiency, reliability and lifespan of electrical equipment and systems. Companies and energy suppliers use various measures and technologies to monitor and improve power quality.
These are:
- Active filters
- High-pass filters
- Passive filters
- Power factor correction (PFC) systems