Electromagnetic Suspension (EMS) is one of the two primary technologies used in magnetic levitation (maglev) transportation systems. EMS maglev relies on attractive magnetic forces generated by electromagnets mounted on the train to lift it just a few millimeters above a ferromagnetic guideway. The train wraps around the guideway from below, and continuous electronic control adjusts the magnetic force to maintain stable levitation without physical contact.

The main components of an EMS system include levitation magnets, guidance magnets for lateral stability, and a linear motor embedded in the guideway that propels the train. Because the train floats above the track, EMS systems eliminate rolling resistance, resulting in lower maintenance costs, quieter operation, and reduced energy consumption compared to traditional rail.

EMS technology is well-suited for low- to high-speed applications, typically ranging from 100 km/h to over 500 km/h. It is used in both urban transit systems (such as airport links and city routes) and high-speed intercity concepts like the German Transrapid. EMS maglev systems are typically fully automated, offering precise control, high safety, and smooth acceleration.

While EMS requires constant power to maintain levitation, its relatively simple infrastructure and proven performance make it ideal for commercial maglev deployment. Countries like Germany, China, and South Korea have implemented or tested EMS-based systems, demonstrating the technology's effectiveness in both short- and long-distance transportation.