Basic Design Principles of Electromagnets

When a direct current passes through a conductor, a magnetic field is generated, and when passing through a conductor made into a solenoid, a magnetic field similar to a bar magnet is generated. A magnetic material is added to the center of the solenoid, and the magnetic material will be magnetized to achieve the effect of strengthening the magnetic field. Therefore, the strength of the magnetic field generated by the electromagnet is related to the magnitude of the direct current, the number of coil turns and the magnetic conductive material in the center. When designing the electromagnet, we will pay attention to the distribution of the coil and the selection of the conductive material, and use the magnitude of the direct current to control the magnetic field. strength. However, the material of the coil has resistance and limits the size of the magnetic field that the electromagnet can generate, but with the discovery and application of superconductors, there will be opportunities to break through the existing limitations.