Electromagnets Used in DVD Players

Electromagnets used in DVD players

A DVD player is a small device that uses electromagnets to spin a dvd causing a signal to appear on whatever device you are watching. Electromagnets play a large role in how a DVD player works and how we are able to spin a disc to a desired speed to watch any movie appear on some sort of screen.  The first DVD player was invented by David Paul Gregg and James Russell who patented their design and technology in 1961.

DvD players use electromagnets to spin the motor that spins the disc that shines a light to show you the movie you are watching. Most dvd players use BLDC motors to spin the disc that use electromagnets. BLDC means Brushless direct current motors that are motors that are powered by direct current electricity and electromagnets. These motors have a permanent magnet rotor with wire wrapped around the electromagnetic stators. DC current flows through the stators which causes the magnet to pull the rotor in a circle allowing the DVD to be played at any desired speed. Without the electromagnet pulling the motor that holds the disc in a circle the DVD could not be played using any other technology.

Without this electromagnetic technology that we use in many everyday motors, specifically such as this BLDC motor used in many DVD players and speakers, we would not be able to watch and enjoy many of the shows, films and moves we love. Even though new technology has come out, creating new ways of watching movies, the DVD player is a classic device that using the fascinating technology of electromagnetism.