The certainty of having to halt at some point when traveling quickly is one of its downsides. The basic principle of friction; you slow to a stop when two surfaces rub together when you need to brake quickly. The value of friction brakes has now been amply demonstrated by their widespread use in automobiles, bicycles, aircraft, and most factory equipment. But they also have a significant disadvantage: because they depreciate slightly with each usage, they are relatively pricey. What is the substitute? One possibility is to use electromagnetic instead of friction to slow down motion. Electromagnetic eddy-current brakes, which can cost half as much to operate over their lifetime as conventional friction brakes, work on a principle that sounds like something from Flash Gordon or Buck Rogers. What are they & their types? Let's look more closely! What is Electromagnetic Eddy Current Brake & its Types?Electro-mechanical brakes, or EM brakes, are other names for electromagnetic brakes. They use electromagnetic force to create mechanical resistance, or friction, which slows down or stops motion. The magnetic field developed by an electrical current passing through a brake coil is potent enough to move an armature on or off a magnetic face. While more complex than this, real eddy current brakes function essentially similarly. The renowned French physicist Jean-Bernard Léon Foucault, who invented the Foucault pendulum and was one of the first to measure the speed of light on Earth precisely, put up these theories in the 19th century. This is why Eddy currents are sometimes referred to as Foucault currents in older books. There are two main types of eddy current brakes: linear and circular. Linear BrakesLinear brakes are used on roller coasters and train tracks when the brake is a part of the track. Two parts make up the simplest linear electromagnetic eddy-current brakes; one is stationary while the other travels in a straight line past it. A series of strong, permanent magnets positioned permanently at the end of the track of a rollercoaster may create eddy currents in metal components attached to the side of the cars as they pass by. Until the end of the ride, where magnets collide with metal and brakes engage, the cars travel freely around the track. A typical train cannot employ this strategy since the brakes may need to be deployed at any point along the route. This implies that the magnets must be integrated into the framework supporting the train's wheels and be the switchable variety. When triggered, electromagnets are less than 1 cm away from the rail and slow the train by generating eddy currents inside the rail itself. Because it is a fundamental principle of electromagnetic that current can only be generated when a conductor is moved through a magnetic field, an eddy current brake can only be used to stop a train and not to keep it stationary after it has stopped. Therefore, eddy current brake-equipped cars also require conventional brakes. Circular BrakesCircular brakes likewise contain one static part and one moving part, just like linear eddy current brakes. Depending on whether the electromagnet travels or remains stationary, they have two primary categories. The simplest ones resemble conventional brakes, but they work by applying magnetism and producing eddy currents in a rotating metal disc that passes through a stationary electromagnet. In the other arrangement, the electromagnets really rotate around a fixed center shaft in a series of coils mounted on an outer wheel. We explained all about electromagnetic eddy current brakes, including their types. Feel free to contact us if you want to know more.
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