• Categories:Industry News
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• Time of issue:2020-10-26 13:32
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(Summary description)The Helmholtz coil is composed of a pair of identical circular conductor coils, using a rectangular coordinate system, and the central axis of the two circular coils with a radius of R is coaxial with the z-axis. The z coordinates of the two circular coils are sum respectively. Each conductor coil carries a current I in the same direction.

This setting can minimize the inhomogeneity of the magnetic field at the center position O (or origin) of the two coils. This action promotes and also means that the superior non-zero differential term is. This argument will be explained in more detail later. However, doing so will still make the magnetic field value between the intersection of the coil plane and the z-axis and point O differ by about 7%.

In some applications, Helmholtz coils can be used to offset the earth's magnetic field, resulting in an area close to zero.

Helmholtz coils are a pair of parallel and connected coaxial circular coils. The current in the two coils has the same direction and magnitude. When the distance d between the coils is exactly equal to the radius R of the circular coil, the circular current-carrying coil is called a Helmholtz coil. The characteristic of this coil is that it can generate a wide and uniform magnetic field near the midpoint of its common axis.

Helmholtz coils are usually used to generate a magnetic field with a relatively large specified volume and high uniformity, but a relatively weak magnetic field value. Users can use this magnetic field to complete various experiments. Helmholtz coils can generate static DC or AC magnetic fields according to different applications. Its main applications are: offset the earth's magnetic field, determine the magnetic shielding effect, the magnetic susceptibility of electronic equipment, the calibration of fluxgates and navigation equipment, the study of biomagnetic fields, and the use of fluxmeters to detect the characteristics of permanent magnets.