News

Medium frequency Steel-shell furnace What is the function of a magnetic yoke? Let’s start by understanding what a magnetic yoke is. Typically, a magnetic yoke refers to a soft magnetic material that doesn’t generate its own magnetic field (magnetic flux lines) but merely serves as a conduit for transmitting magnetic flux within a magnetic circuit. Magnetic yokes are commonly made from soft iron, A3 steel, and soft magnetic alloys—materials with relatively high permeability. In certain special applications, ferrite materials may also be used to fabricate magnetic yokes. Thanks to the presence of a magnetic yoke, we can direct the magnetic flux lines generated by current-carrying coils or permanent magnets to precisely where they’re needed—this principle is somewhat analogous to how an electrical circuit functions.

Medium-frequency melting furnace The furnace body is equipped with a medium-frequency steel-shell furnace magnetic yoke. The magnetic yoke’s shielding function reduces magnetic leakage, prevents the furnace body from overheating, and improves efficiency. At the same time, the magnetic yoke serves to support and secure the induction coil, enabling the medium-frequency furnace body to achieve high strength and low noise levels. The magnetic yoke is a crescent-shaped structure made of cold-rolled silicon steel sheets and stainless steel clamps. The mating surface between the iron core and the coil is arc-shaped, and the compression area is a surface rather than a single line as in previous designs. This structural design provides excellent compression performance and minimizes magnetic leakage.

The magnetic yoke is an iron core made by stacking silicon steel sheets. It is evenly and symmetrically arranged around the induction coil, operating at medium frequency. Steel-shell furnace The magnetic yoke manufacturer states that its function is to confine the stray magnetic flux from the induction coil, thereby improving the efficiency of induction heating. Additionally, as a magnetic shield, it reduces heat generation in metal components such as the furnace frame and also serves to reinforce the induction coil itself. After the silicon steel laminations are stacked, they are secured using specialized clamping plates rather than dedicated through-bolts. This structural design fully utilizes the magnetic-conducting area of the silicon steel laminations, minimizing the likelihood of localized overheating in the body of the medium-frequency induction melting furnace.