4oz thick copper magnetic coil PCB

Electricity and magnetism are mutually inductive and interdependent, existing synchronously in electromagnetic phenomena. When a steady direct current (DC) passes through a conductor, a steady magnetic field is consistently induced around the conductor. When the conductor is formed into an inductive coil, it can be determined based on the electromagnetic induction principle that a magnetic field is present within the inductive coil. When the inductive coil is integrated into a current loop, any variation in the DC current of the circuit (e.g., from low to high or vice versa) will cause a corresponding change in the magnetic field inside the inductor. This varying magnetic field will induce an induced current in the coil. In accordance with the electromagnetic induction law, the direction of this induced current must be opposite to that of the original DC current, thereby exhibiting a certain impedance to the change of DC current in a short period. However, once the current stabilizes after the variation is completed, the magnetic field will no longer change, and the impedance effect will cease to exist.