What is a whirlpool?
The whirlpool is generated by the hot tub when two electromagnetic fields crosses. It circulates in a direction that opposes the original current. The resistance resulting from the collision of both fields effectively converts the part of the electricity present to the heat, the undesirable by -product, if the intention is simple to transmit electricity, as in the transformer. Other applications, however, use contradictory magnetism of whirlpools to achieve additional results, including metal identification, testing of materials and technical assemblies and braking of railway cars. The layers of conductive material are separated by layers of insulating material. As a result, the natural magnetic attraction of the unnatural force to the conductive material is fragmented and has no chance of creating a counterproductive swirling current.
Sometimes the production of heat is using whirlpool, especially in industrial furnaces used to melt metals. Varytopes of residential inductions rely on the same principle, while the electromagnetic field of the burner the ReactIt is with a magnetic field of special iron dishes. Heat only occurs where both surfaces meet, so the rest of the hob does not.
Two applications with low technologies for whirlpools are found in sales vending machines and recycling. In the vending machine, stationary magnet causes an invalid object, such as a steel slug. On a much larger scale, types of cans and other recyclable metals can be sorted because each metal responds to enemy magnetic power in a way.
In the swirling current brake, the magnetodolation of IC is great enough to stop the railway car. In a system comparable to friction, the magnetic force resists steel wheels. As the wheels slow down, the resistance decreases, allowing a gradual slowdown and smooth stop. The closure mechanisms for electrical tools such as circular saws work in a similar way.
Eddy CurRent Inspection allows non -destructive analysis of conductive metals and assemblies that contain them. With this technique, the inspector induces the whirling current in the test material and then seeks irregularities in the current flow. For example, discontinuity in the interaction of two magnetic fields could indicate the presence of a crack. This type of testing is sufficiently sensitive to check changes in the thickness of material, corrosion or other undesirable, hidden conditions.
One of the remarkable users of Eddy Current Inspection is the National Aviation and Space Administration of the United States (NASA). Theagentura often has to solve problems with materials and systems that are already introduced, so the non -destructive aspect of the swirling probe is essential. In the spring of 2009, NASA discovered a defect in the control valve, a critical component that controls the flow of fuel during the start of the shuttle and other missiles. Testing Eddy Current Testing allowed the agency to monitor the status of the valve and eventually it was determined that allThe moves should be replaced.