Previously, we introduced the Maxwell software to establish 2D coil magnetic field simulation. Sometimes, 3D coils cannot be simplified to 2D. In this case, it is necessary to establish a complete 3D coil model. The basic analysis is similar to the 2D coil magnetic field simulation. The main difference is that you need to segment the current-carrying cross section yourself. The following is a detailed introduction.

1. Geometric model establishment

The coil geometry model shown in the figure below can be established by using 3D modeling software and then imported into Maxwell, or it can be established directly in Maxwell software. Since the model is relatively simple, this article directly establishes the geometry model in Maxwell software. As shown in the figure below, the outer diameter of the coil is 40mm, the inner diameter is 32mm, and the height is 30mm.

 2. Assign materials

 3. Cut out the current-carrying cross section

 Split the coil along the YZ plane

 Separate the cut sections

 After separation, delete one of them and keep one section.

4. Set up current excitation and boundary conditions

Select the cross section to set the current excitation, the current size is 1A (ampere-turns), and the type is selected as Stranded. The current-carrying conductor is divided into winding and solid. Select winding here.

 Select the air domain surface to set the flux parallel boundary condition

 5. Solve the problem and use the default configuration

 6 Set the air domain mesh size

 7. Results display

Magnetic field strength vector diagram

 Magnetic field intensity cloud map

 Variation of magnetic field strength along the path in the middle of the coil