Permanent Magnets – The most used Magnet Choice

There are three main sorts of magnets – permanent, temporary and electromagnets. These three types, permanent magnets are an average person is most familiar with. A good example of one common, everyday permanent magnet is often a fridge magnet.

They can be considered permanent because if they are magnetized they maintain their volume of magnetism. It becomes an object made out of a material that’s magnetized and it also creates a persistent magnetic field.

They are often made in nearly every possible shape. A good magnet should create a high magnetic field that has a low mass. Moreover, while you are seeking qualities of any good over unity magnetic you wish to ensure that it’s stable from the influences that may demagnetize it.

There are a selection of several varieties of these and every type has different characteristics and properties. What differentiates these includes:
• How easily they are often demagnetized
• How strong they may be
• How their strength changes according to the temperature

Sorts of permanent magnets include:
• Neodymium
• Samarium-cobalt
• Alnico
• Ceramic (also referred to as ferrite)

Neodymium and samarium-cobalt are called rare earth magnets. Rare earth magnets make the largest magnetic flux together with the smallest mass. They are renowned for is the strongest of all permanent magnets and they are tough to demagnetize.

Alnico’s name comes from its components. Alnico is made from aluminum, nickel and cobalt. This particular type just isn’t easily troubled by temperature, yet it is easily demagnetized.

Finally, ceramic or ferrite magnets are perhaps typically the most popular type, ultimately because of their flexibility. They are flexible and sometimes thin, and therefore they could be bent and moved in many different methods, which makes them excellent options for marketing purposes. They are fairly strong and not easily demagnetized, however strength varies based on the temperature.

The reason for permanent magnets vary greatly, including:

1. Mechanical applications depend upon the attractive and repelling force with the magnet. Such applications include:
• Magnetic separators & holding devices
• Torque drives
• Bearing devices

2. Electrical energy applications depend on utilizing the magnetic field to convert mechanical energy into electric energy. Such applications include:
• Generators and alternators
• Eddy current brakes

3. Mechanical energy applications count on while using the magnetic field to change electricity to mechanical energy. Such applications include:
• Meters
• Motors
• Speakers
• Relays

4. Applications that are meant to direct, shape and control electron and ion beams. Such applications include:
• Ion Pumps
• Cyclotrons
• Cathode-ray tubes

Permanent magnets would be the well known and are also utilized in a number of products and environments. When selecting these you want to consider its strength, performance in temperature and whether it be easily demagnetized.

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About the Author: Valerie Clancy