What is electro permanent magnet?

An electro permanent magnet is an upgraded hybrid of electro magnet and permanent magnet, in which the external magnetic field can be switched on or off by a pulse of electric current in a wire winding around part of the magnet, but requires no electricity to maintain the field. It’s composed of magnet materials, steel parts, coils and electronic control device.

How does an electro permanent magnet work?

An electro permanent magnet contains two magnetic materials, one magnetically hard (e.g. Nd-Fe-B) and one semi-hard (e.g. Alnico), capped at both ends with a magnetically soft material (e.g. Iron) and wrapped with a coil. A current pulse of one polarity magnetizes the materials together, increasing the external flow of magnetic flux. A current pulse of the opposite polarity reverses the magnetization of the semi-hard material, while leaving the hard material unchanged. This diverts some or all of the flux to circulate inside the device, reducing the external magnetic flux.

Main Features:

• Unique EPM technique using double magnet systems.
• EPM needs electricity only during switching magnet ON and OFF.
• Over 95% of electricity saved compared to conventional electromagnet during working.
• Magnetic force still remains in the event of a sudden power failure.
• Low maintenance cost

Applications:

Electro permanent magnets are very strong and versatile, and thus can be used as material handling/lifting magnets, workpiece holding magnetic chucks, magnetic clamping system for molds and dies, and magnetic grippers for automation. For years, we have been providing custom engineered magnets for a wide range of applications in industries including metal fabrication, shipbuilding, steel mill, automotive, medical industry, mechanical engineering, transport company, material store, etc.

Steel construction

Steel wholesalers.

Mechanical engineering

Shipyards and offshore

Train and rolling stock

Metal cutting workshops

Molds and dies

Automotive

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Medical

Energy

Automation