ferriittiytimiä

Ferriittiytimet are ferrite-based cores used in electronics to concentrate magnetic flux in devices such as inductors and transformers. They are made from ferrite ceramics and are chosen for their high electrical resistivity, which helps minimize eddy current losses at high frequencies. The two main families are manganese-zinc (MnZn) ferrites and nickel-zinc (NiZn) ferrites, each with different permeability and frequency characteristics.

Ferriittiytimet come in various shapes, including toroidal rings, disks, beads and rods. They are often assembled into components such as inductors, transformers or EMI filters, and can also surround a wire as a choke or ferrite sleeve to suppress high-frequency interference. The manufacturing process typically involves mixing metal oxides, forming the ceramic, and sintering at high temperature to create a solid, durable core.

Key properties include high resistivity, relatively high permeability (especially MnZn at lower frequencies), and favorable performance at radio and power-electronic frequencies. NiZn ferrites, with lower permeability but very high resistivity, are commonly used for higher-frequency applications. Temperature behavior and saturation flux density depend on composition and design.

Applications of ferrite ydit (ferriittiytimet) span power electronics, such as switch-mode power supplies and common-mode chokes, as well as RF components and EMI suppression devices. They offer compact, low-loss solutions for handling high-frequency magnetic fields, though they generally provide lower saturation levels and mechanical brittleness compared with metallic cores.