ORNL’s Omer Onar, left, power electronics research lead, discusses the 270-kW wireless charging system’s lightweight polyphase electromagnetic coupling coil, pictured in foreground, with Lee Slezak, ...

The possibilities of alternating current by no means stop with using a single source. Ordinary household current in the US is at 60 Hz and about 120 volts. We have, in other words, a single undulating ...

Three-phase is a common method of electric power transmission. It is a type of polyphase system used to power motors and many other devices. Three phase has properties that make it very desirable in ...

Digital signal processing is ubiquitous in modern electronic systems, from MP3 players to digital cameras to wireless handsets. One of the mainstays of a DSP designer’s tool box is the FIR ...

Two decades after it was built, Southern High School's intercom, fire alarm, fire sprinkler and bell systems are now undergoing a first major upgrade that's worth $570,400, an education official and ...