20-09-2017, 10:55 AM
Electromagnetic brakes (also called electromechanical brakes or EM brakes) slow or stop the movement using electromagnetic force to apply mechanical (friction) resistance. The original name was "electromechanical brakes" but over the years the name changed to "electromagnetic brakes", referring to its method of actuation. Since it became popular in the mid-20th century, especially on trains and trams, the variety of applications and brake designs has increased dramatically, but the basic operation remains the same. Both electromagnetic brakes and eddy current brakes use electromagnetic force but electromagnetic brakes are ultimately dependent on friction and eddy current brakes use magnetic force directly.
Applications
In locomotives, a mechanical link transmits the torque to an electromagnetic braking component. Trams and trains use electromagnetic brakes where the braking element is pressed by magnetic force to the rail. They are distinguished from the mechanical brakes of the track, where the braking element is mechanically pressed into the track.
Electric motors in industrial and robotic applications also employ electromagnetic brakes. Recent design innovations have led to the application of electromagnetic brakes to aircraft applications. In this application, a motor / generator combination is first used as a motor to turn the tires up to the speed before landing, thus reducing tire wear, and then as a generator to provide regenerative braking.
Applications
In locomotives, a mechanical link transmits the torque to an electromagnetic braking component. Trams and trains use electromagnetic brakes where the braking element is pressed by magnetic force to the rail. They are distinguished from the mechanical brakes of the track, where the braking element is mechanically pressed into the track.
Electric motors in industrial and robotic applications also employ electromagnetic brakes. Recent design innovations have led to the application of electromagnetic brakes to aircraft applications. In this application, a motor / generator combination is first used as a motor to turn the tires up to the speed before landing, thus reducing tire wear, and then as a generator to provide regenerative braking.