Inductor winding machine manufacturers tell you whether the hollow inductor coil will be magnetic saturation

Magnetism does not saturate in the absence of change. The magnetic properties of permanent magnetic materials are constant, while soft magnetic materials themselves are not magnetic. Soft magnetic materials are easy to magnetize and demagnetize, and magnetic saturation occurs when the magnetic flux reaches a certain amount. Magnetic saturation is a physical property of magnetic materials, which means that the magnetic flux passed by a magnetically conductive material cannot be increased indefinitely due to the limitation of physical structure, and thus remains in a certain amount. Magnetic saturation is a physical property of magnetic materials, magnetic saturation is generated, in some occasions is harmful, but some occasions sometimes beneficial. For example, magnetic saturation voltage regulator, is the use of the core of the magnetic saturation characteristics to achieve the purpose of voltage stabilization. Power transformer (coil inductance) saturation, then the current increases sharply, and will soon heat up and burn. Hollow coil because the medium inside the coil is air, the air is very large magnetic resistance. It is very difficult to saturate it. Although hollow coils basically do not saturate, it does not mean that hollow coils can be used indefinitely, only that the bandwidth of hollow coils is very wide.

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