“eddy current”的概念、定义、翻译、参考文献-科学参考

eddy current

Physics

A current induced in a conductor situated in a changing magnetic field or moving in a fixed one. Any imagined circuit within the conductor will change its magnetic flux linkage, and the consequent induced e.m.f. will drive current around the circuit. In a substantial block of metal the resistance will be small and the current therefore large. Eddy currents occur in the cores of transformers and other electrical machines and represent a loss of useful energy (the eddy-current loss). To reduce this loss to a minimum metal cores are made of insulated sheets of metal, the resistance between these laminations reducing the current. In high-frequency circuits ferrite cores can be used. Eddy currents in a moving conductor interact with the magnetic field producing them to retard the motion of the conductor. This enables some electrical instruments (moving-coil type) to utilize eddy currents to create damping and hence a stable reading in a short time. Eddy currents are also used in induction heating.

Electronics and Electrical Engineering

A current induced when a conductor is subject to a varying magnetic field. Energy is dissipated by eddy currents (eddy-current loss), usually appearing as heat, and becomes significant in high-frequency applications. This effect is utilized in induction heating. Eddy currents in a moving conductor react with the magnetic field to produce retardation of the motion and are used to produce damping. They are sometimes called Foucault currents (although discovered by Joule).

单词	eddy current
释义	eddy current Physics A current induced in a conductor situated in a changing magnetic field or moving in a fixed one. Any imagined circuit within the conductor will change its magnetic flux linkage, and the consequent induced e.m.f. will drive current around the circuit. In a substantial block of metal the resistance will be small and the current therefore large. Eddy currents occur in the cores of transformers and other electrical machines and represent a loss of useful energy (the eddy-current loss). To reduce this loss to a minimum metal cores are made of insulated sheets of metal, the resistance between these laminations reducing the current. In high-frequency circuits ferrite cores can be used. Eddy currents in a moving conductor interact with the magnetic field producing them to retard the motion of the conductor. This enables some electrical instruments (moving-coil type) to utilize eddy currents to create damping and hence a stable reading in a short time. Eddy currents are also used in induction heating. Electronics and Electrical Engineering A current induced when a conductor is subject to a varying magnetic field. Energy is dissipated by eddy currents (eddy-current loss), usually appearing as heat, and becomes significant in high-frequency applications. This effect is utilized in induction heating. Eddy currents in a moving conductor react with the magnetic field to produce retardation of the motion and are used to produce damping. They are sometimes called Foucault currents (although discovered by Joule).
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