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Since its establishment in 1964, Ohtama Co., Ltd. has been recognized in the industry as a maker specialized in magnetic shielding with Permalloy

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OHTAMA CO.,LTD. Technical information
Technical information
What is the magnetic field?
Examples of interference
Principle of magnetic shield
Concerning Permalloy
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What is the magnetic field?

Image photoWhat is the magnetic field?
Magnets attract iron. They attract or repel each other. Every magnet is believed to have the so-called magnetic field around it, which is invisible. Due to the influence of this magnetic field, magnets attract or repel each other. The Earth also has its own magnetic field. Even a piece of iron comes to have a magnetic field after attracted by a magnet, which is not so strong as those of magnets. Other than magnets, electric wires or power cables sometimes have magnetic fields. However, this does not mean that they have their own magnetic fields. They come to have magnetic fields only when electric currents are passing through them: that is, electric currents generate magnetic fields. (Magnets continue to have magnetic fields almost permanently. There is no moment for them to lose their magnetic fields.)

Examples of interference Principle of magnetic shield Concerning Permalloy
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