FAQ

What is NANOPERM® ?

NANOPERM® is a rapidly quenched iron based alloy with a fine crystalline microstructure. The typical grain size is only 10nm - this is why the material is called 'nanocrystalline'. This fine material structure is the reason for extraordinary softmagnetic properties which can be adjusted in a wide range by an annealing process under the presence of external magnetic fields.

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How to make tape wound cores at MAGNETEC
?

Firstly, the unprocessed amorphous ribbons are slitted in appropriate widths on specially designed machines. Depending on the need the slitted tape can be strip coated (insulation) - among others to achieve better high-frequency properties. Then the tape is wound into the desired toroidal core dimensions on special winding machines. The winding thorn diameter corresponds to the desired core inner diameter. In a next step the toroidal cores are annealed by a special heat treatment - under presence of external magnetic fields. Here the soft magnetic properties such as permeability level, core losses and magnetostriction are 'adjusted'. After reviewing the core characteristics - usually by electrical measurement - the toroidal cores are fixed - i.e. cased in a plastic housing or coated with epoxy resin. Finally after a repeated core measurement the finished cores are marked.

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Is MAGNETEC manufacturer of the amorphous ribbon ?

The amorphous ribbon isn´t manufactured by MAGNETEC, but is purchased from different international suppliers in big quantities - several hundred tons per year.

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last update: 2016-10-18