Rotating and Gradient Magnetic Field of 3D Helmholtz Coil

Case study

The X and Y axis coils are charged to form a 90-degree orientation angle, and the magnetic field can rotate; There is a conductor inside, and the conductor will rotate when it conducts magnetism.

The conductor piece rotates in a three-dimensional Helmholtz coil

Introduction to three-dimensional Helmholtz coils, rotating magnetic field, and gradient magnetic field
 
A three-dimensional Helmholtz coil is a magnetic field generator composed of three coaxial toroidal coils. This coil design produces a uniform and controllable magnetic field, characterized by a magnetic field whose strength remains constant in space. By adjusting the current and geometry of the coil, we can achieve precise control over the strength and direction of the magnetic field. Three-dimensional Helmholtz coils are widely used in magnetic field experiments, magnetic resonance imaging and other fields.

Rotating magnetic field refers to the phenomenon that the direction of the magnetic field changes periodically in space. By introducing AC power into a three-dimensional Helmholtz coil, we can achieve the generation of a rotating magnetic field. Rotating magnetic field have many applications. For example, in the study of magnetic properties of materials, rotating magnetic field can be used to change the magnetic behavior of materials, thereby achieving control of material properties.

Gradient magnetic field refers to the phenomenon that the magnetic field intensity changes linearly in space. In a three-dimensional Helmholtz coil, we can generate gradient magnetic field by applying currents of different sizes to different coils.

Gradient magnetic field are widely used in medical imaging. For example, in magnetic resonance imaging, through the action of gradient magnetic field, signals at different locations can be distinguished, thereby obtaining high-quality images.

Simulation of rotating magnetic field