Techniques to Control Electromagnetic Interference
There are some technique available to reduce the effect of EMI or for controlling EMI. Some of them are:
- Grounding
- Shielding
- Filtering
Grounding
Grounding is similar to earthing. Grounding protects the entire power system from poor performance or malfunctioning. The one side of live wire is connected to electrical appliances and other side is inserted into ground to avoid overloading and other accidents. An electrical conductive path is introduced in this between electrical and electronic system and a reference point – basically it is the connection made to the earth.
Shielding
For reducing the effect of EMI, EMI shielding is done. EMI shielding is method of creating a barrier that prevents leakage of strong electromagnetic fields that can interfere with electrical devices and signals. EMI shielding is done to isolate the electromagnetic field source or as an enclosure of the device that needs protection. It contains radiation in the source and consist of a circuit as well. So small radiation ends up by penetrating the shield if it is not so thick .
Filtering
EMI filters are an effective way to protect devices against the harmful impacts of electromagnetic interference. EMI filtering is also known as EMI suppression filters. EMI filters are attached to devices or circuits and it can suppress electromagnetic noise transmitted through conduction. These filters remove any unwanted current conducted through wires and cables.
Electromagnetic Interference
Electromagnetic Interference(EMI) is the interference caused in an electrical path or electrical device due to an external source such as lightning, solar storms, and solar flares. Have you ever experienced some unwanted noise, while communicating through mobile phones? This unwanted noise is caused because of Electromagnetic Interference. In this article we are going to learn what is electromagnetic interference with Some Examples Next we will go through how it evolves, its effect, its properties of electromagnetic Interference, advantages and disadvantages of electromagnetic interference. So it is basically an unwanted noise in the electric circuit by an outside source.
Electromagnetic Interference is also called as radio frequency interference as it is also a subset of electrical noise on the EMI spectrum and it disrupts the radio frequency system.
Table of Content
- What is Electromagnetic Interference (EMI)?
- Cause and Effect
- Characteristics
- EMI Coupling Mechanisms
- How is EMI transmitted ?
- Techniques to Control EMI
- Advantages and Disadvantages