How is the concept of eddy currents and eelctrogmagnetic damping used in speedometers, electric brakes and dead beat galvanometer?
In The Brakes of Trains During braking, the brakes expose the metal wheels to a magnetic field which generates eddy currents in the wheels. The magnetic interaction between the applied field and the eddy currents acts to slow the wheels down. The faster the wheels spin, the stronger is the effect, meaning that as the train slows the braking force is reduces, producing a smooth stopping motion.
Speedometers To know the speed of any vehicle, these currents are used. A speedometer consists of a magnet which keeps rotating according to the speed of our vehicle. Eddy currents are been produced in the drum. As the drum turns in the direction of the rotating magnet, the pointer attached to the drum indicates the speed of the vehicle.We can tgo to further deatails as these have close relation with vehicle parts and are complicated
n a dead beat galvanometer, eddy currents help in electromagnetic damping.
Electromagnetic damping: This is used in designing deadbeat galvanometers. When a current, which is steady, is passes through the coil of galvanometer, it is deflected. Normally the coil oscillates about its equilibrium position for some time before coming to the rest. But due to eddy currents in the core of the coil the coil attains its equilibrium position almost instantly. Thus, the motion of coil is damped. This is called electromagnetic damping.
During braking, the brakes expose the metal wheels to a magnetic field which generates eddy currents in the wheels. The magnetic interaction between the applied field and the eddy currents acts to slow the wheels down. The faster the wheels spin, the stronger is the effect, meaning that as the train slows the braking force is reduces, producing a smooth stopping motion.
To know the speed of any vehicle, these currents are used. A speedometer consists of a magnet which keeps rotating according to the speed of our vehicle. Eddy currents are been produced in the drum. As the drum turns in the direction of the rotating magnet, the pointer attached to the drum indicates the speed of the vehicle.We can tgo to further deatails as these have close relation with vehicle parts and are complicated
n a dead beat galvanometer, eddy currents help in electromagnetic damping.
Electromagnetic damping: This is used in designing deadbeat galvanometers. When a current, which is steady, is passes through the coil of galvanometer, it is deflected. Normally the coil oscillates about its equilibrium position for some time before coming to the rest. But due to eddy currents in the core of the coil the coil attains its equilibrium position almost instantly. Thus, the motion of coil is damped. This is called electromagnetic damping.
