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Tape Wound Toroidal Cores

The tape wound toroidal core is close to the perfect magnetic path configuration and allows for the most efficient application of high magnetic conductivity magnetic alloys. The physical and magnetic properties of the ring reveal many features that contribute to this near-perfect circuit.


For example, the air gap in the magnetic path is so small that it does not exist. This minimizes loss, edges, leaks, deformations, and reduces the magnetic force required to produce a given flux within the material.

In the ring core and coil assembly, the entire magnetic circuit is contained in the electrical winding, further reducing the leakage flux and increasing the coupling of the winding to the winding. The tape wound cores does produce a smaller flux up the axis, but this leakage flux can be suppressed by assembling it into a ring stack at the top and bottom of the core.

The tape wound core configuration also provides good self-shielding to resist external magnetic fields. A single, uniform magnetic path causes any in-entry magnetic field to be divided into two parts and an equal but opposite voltage is sensed in both halves of the evenly distributed windings. Therefore, there does not appear to be a significantly induced voltage throughout the winding.

Available shapes, sizes and materials
Magnetic Metals produces winding ring cores and other shaped cores for power transformers, inductors, drive transformers, saturation resistors, magnetic amplifiers, current transformers, converters and inverters.

We offer a wide range of sizes and materials for the iron core of the winding transformer. Molds of almost any size can be manufactured to reduce mold costs. You can also choose from a variety of housings or coating materials to meet your requirements.

Magnetic materials for tape wound cores can be divided into two categories: "square ring" or "Round ring". This classification is based on the relative shape of the B-H loop.
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