How do EMI filters work?
An EMI filter for a power supply normally consists of passive components, including capacitors and inductors, connected together to form LC circuits. The inductor(s) allow DC or low frequency currents to pass through, while blocking the harmful unwanted high frequency currents.
What is the main purpose of an in line filter?
A line filter is the kind of electronic filter that is placed between electronic equipment and a line external to it, to attenuate conducted radio frequencies — RFI, also known as electromagnetic interference (EMI) — between the line and the equipment.
How are EMI filters used in power lines?
Power line EMI filters are designed to attenuate (or reduce) all radio frequency emissions or energy that is above the applicable EMC specification.
Where does the energy for EMI come from?
Every electrical or electronic device connection may become a potential source of EMI. It is generated externally by cosmic energy, such as solar flares, lightning strikes, atmospheric noise, electronic equipment, power lines and so on. A large part of it is generated along the power line and transmitted to the equipment through the power line.
What kind of power filter do I Need?
PF91-PF98 Power Entry Modules, Power Line & 3 Phase Power Filters are designed in multiple configurations to cover a range of industrial applications. These have excellent attenuation for high voltage impulse, are available in single and dual stage and address FCC Part 15 regulations while meeting your power filtering needs…
Where do power line filters need to be installed?
Proper installation of a filter network is critical to achieving successful filtering of electromagnetic interference. API recommends that power line filters be installed where the power line enters the equipment. The filter acts as a barrier between polluted energy and clean energy going into your equipment.