Magnetic Metals Corporation products

The tape wound toroidal core approaches the perfect magnetic circuit configuration as well as permitting the most efficient application of high permeability magnetic alloys. The physical and magnetic characteristics of the toroidal shape reveal many features which contribute to this near-perfect circuit. For instance, the air gap in the magnetic path is so small that it can be considered non-existent. This minimizes losses, fringing, leakage, distortion, and decreases the magnetizing force necessary to produce a given flux within the material. In a toroidal core and coil assembly, the entire magnetic path is contained within the electrical winding, further minimizing leakage flux and increasing winding-to-winding coupling. Tape wound cores do generate a small flux in the axial direction, however, this leakage flux can be contained by ring laminations assembled to the top and bottom of the core.

Tape wound cut cores throughout the core manufacturing industries are currently being produced with a straight cut along the horizontal plane as core shown in Figure 1 below. The core is cut in this manner so that a coil designed with specific winding turns and dimensions can be placed onto the leg of the core as part of an assembly unit for a transformer (see Figure 2).

Our amorphous-alloy cores provide a wider range of high frequency properties and lower core losses than other soft magnetic materials. Amorphous Alloys are metallic glass materials without a crystalline structure. Amorphous-Alloy Cores provide better electrical conductivity, higher permeability and magnetic density, and efficient operation over a wider temperature range than cores made from conventional materials. Smaller, lighter, and more energy-efficient designs are possible for transformers, inductors, invertors, motors, and any device requiring high frequency, low loss performance.