If a product has to be redesigned, it can be prohibitively expensive and result in delays to market and a loss in consumer confidence.īad product design (from an EMC or EMI perspective) would be when earthing, filtering, and shielding have not been considered. How to design for EMI & EMC to minimize risk The standards used are therefore based primarily on radiated and conducted tests. The two key methods that electromagnetic activity or ‘energy’ can reach a product are through the air (radiative coupling) or via the cabling (conductive coupling). ![]() How will the energy travel from the product to its “victim”?.With what/whom is it going to interfere?.Where is this product going to be used?.The device’s intended application will determine the exact type of testing required. In addition, specific industrial or military standards will apply to the product depending on its target market and therefore also need to be considered.Įvaluating how a device will react when exposed to electromagnetic energy is known as susceptibility or immunity testing and involves determining the ability of a device to tolerate noise from external sources.Meanwhile, emissions testing measures the amount of EMI generated by the device that could affect other electrical products and can provide an accurate measurement of the amount and type of noise generated by a device. However, different requirements in the US and the European Union (EU), as well as differing interpretations of the meanings of EMC and EMI, often cause confusion when it comes to testing. ![]() Failing to consider them in the initial stages of product development can result in the time-consuming and costly need to redesign the product at a later stage to meet EMC/EMI specification tests and prevent product failure or safety risk. Electromagnetic compatibility (EMC) and interference (EMI) are both extremely important design considerations.
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