Issue link: https://resources.randsim.com/i/1449549
Electromagnetism – A Quick Summary Electromagnetism is the branch of physics that studies the electromagnetic force, which is a type of physical interaction that occurs between electrically charged particles. The magnetic field is produced by the motion of electric charges (current), and currents are induced by changes in a magnetic field. Electromagnetic interference (EMI) generated by devices can cause physical damage to operational equipment and negatively impact the health of nearby individuals. Therefore, it is critical to design products with EMC in mind. Electromagnetic Compatibility and Compliance EMC is the branch of electrical engineering concerned with the unintentional generation, propagation, and reception of electromagnetic energy. Every electronic product must pass several EMC compliance tests to confirm that it does not: ► Negatively interfere with the environment around it ► Malfunction when in the presence of other electronics ► Adversely impact the users. To ensure compliance with all regulatory requirements, the products undergo several certification tests. These are four common tests: 1. radiated emissions – Measures the strength of the electromagnetic field generated to make sure the levels are below the limits specified by various regulatory bodies (e.g., FCC, Industry Canada, RED, CISPR). 2. Conducted emissions – Looks at electromagnetic interference, or noise, on the power lines connected to the electronic device. 3. radiated immunity – Tests the device to ensure it functions properly when subjected to external electronic fields, which come from a wide range of sources, such as cell phones and motors. 4. Specific Absorption Rate (SAR) – Measures the field strength of electromagnetic waves generated within proximity to humans and ensures these power levels are sufficiently low enough to not cause negative physical effects (e.g. cell phones, MRI, etc). If you are an electrical engineer or engineering product manager that needs to present a recommendation to company decision makers, teams, and coworkers about how to cut costs and decrease time-to-market, read this whitepaper. It provides the information you can use to clearly articulate electromagnetic compatibility (EMC) challenges and solutions.