eddy current

简明释义

涡流

英英释义

例句

1.The design of transformers often considers eddy currents 涡流 to minimize energy loss.

变压器的设计通常考虑到涡流 eddy currents 以最小化能量损失。

2.In non-destructive testing, eddy currents 涡流 are used to detect surface cracks in metals.

在无损检测中，使用涡流 eddy currents 来检测金属表面的裂缝。

3.In induction heating, eddy currents 涡流 are generated to heat metal objects efficiently.

在感应加热中，产生涡流 eddy currents 用于高效加热金属物体。

4.The braking system of the train uses eddy currents 涡流 to slow down without physical contact.

火车的制动系统利用涡流 eddy currents 来减速，而无需物理接触。

5.The principle of eddy currents 涡流 is applied in magnetic levitation trains for smooth operation.

涡流 eddy currents 的原理应用于磁悬浮列车，以实现平稳运行。

作文

Eddy currents are loops of electric current that are induced within conductors by a changing magnetic field in the conductor. These currents can be observed in various applications, such as induction heating and electromagnetic braking. The phenomenon of eddy current (涡流) is an important concept in physics and engineering, as it demonstrates the principles of electromagnetic induction, which was first discovered by Michael Faraday in the 19th century.In practical terms, eddy currents (涡流) arise when a conductor is exposed to a time-varying magnetic field. When the magnetic field changes, it induces a voltage in the conductor according to Faraday's law of electromagnetic induction. This induced voltage generates circulating currents within the material, which are known as eddy currents (涡流). These currents flow in closed loops perpendicular to the magnetic field direction, creating their own magnetic fields that oppose the original change in magnetic flux, a phenomenon described by Lenz's law.One of the most common applications of eddy currents (涡流) is in induction heating, where they are used to heat metals for forging or melting. When a metal object is placed in an alternating magnetic field, eddy currents (涡流) are induced within the metal, leading to resistive heating due to the material's electrical resistance. This method is efficient and allows for precise control over the heating process, making it ideal for industrial applications.Another notable use of eddy currents (涡流) is in electromagnetic braking systems, especially in trains and roller coasters. In these systems, eddy currents (涡流) are generated in conductive materials as they move through a magnetic field. The interaction between the eddy currents (涡流) and the magnetic field creates a braking force that slows down the moving object without physical contact, reducing wear and tear on mechanical components.However, eddy currents (涡流) can also have undesirable effects, particularly in electrical transformers and motors. The presence of eddy currents (涡流) can lead to energy losses in the form of heat, which reduces the efficiency of these devices. To mitigate this issue, engineers often design transformers with laminated cores made of thin sheets of magnetic material, which helps to minimize the formation of eddy currents (涡流) by increasing the electrical resistance of the path through which they can flow.In conclusion, understanding eddy currents (涡流) is crucial for both theoretical and practical aspects of electromagnetism. Their ability to generate heat and provide non-contact braking has led to significant advancements in various technologies. However, managing their effects is equally important to enhance the efficiency of electrical devices. As technology continues to evolve, the study of eddy currents (涡流) will remain a vital area of research, opening up new possibilities for innovation in engineering and physics.