What is the magnetic circuit, what is the magnetic circuit open, closed state?

- Aug 13, 2019-

Magnetic circuit is composed of one or more permanent magnets, current-carrying wires and soft iron in accordance with a certain shape and size to form a component with a specific working air gap magnetic field.Soft iron can be pure iron, low carbon steel, ni-fe alloy, ni-co alloy and other materials with high permeability.Soft iron, also known as yoke iron, plays a role in controlling flux flow, increasing local magnetic induction intensity, preventing or reducing magnetic leakage, and improving the mechanical strength of the whole structure.


The magnetic state of a single magnet without soft iron is usually called open state.When a magnet is in a magnetic flux loop composed of soft iron, the magnet is said to be in a closed state.