Permanent Magnets
There are three main types of magnets - permanent, temporary and electromagnets. Of these three types, permanent magnets are the ones the average person is most familiar with. A good example of a common, everyday permanent magnet is a fridge magnet.
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| Permanent Magnets: The attraction strength of permanent magnets and the variety of popular magnets today |
- photo by Neodymium Magnets Fishing D90
They are considered permanent because once they are magnetized they keep their level of magnetism. It is an object made from a material that is magnetized and it creates its own persistent magnetic field.
They can be created in almost every possible shape. A good magnet should produce a high magnetic field with a low mass. In addition, when you are looking for qualities of a good permanent magnet you want to ensure that it is stable against the influences that can demagnetize it.
Permanent Magnets - The Most Popular Magnet Choice
There are a number of different types of these and each type has different characteristics and properties. What differentiates these includes:
• How easily they can be demagnetized
• How strong they are
• How their strength changes depending on the temperature
The uses of permanent magnets vary greatly, including:
1. Mechanical applications rely on the attractive and repelling force of the magnet. Such applications include:
• Magnetic separators & holding devices
• Torque drives
• Bearing devices
2. Electrical energy applications rely on using the magnetic field to convert mechanical energy into electric energy. Such applications include:
• Generators and alternators
• Eddy current brakes
3. Mechanical energy applications rely on using the magnetic field to convert electrical energy 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 are the most commonly known and are used in a variety of products and environments. When choosing these you want to consider its strength, performance in temperature and whether it is easily demagnetized.
The Most Popular Magnet Choice
Permanent magnets used for experiments, learn the missing secrets of magnetism:
Other types of magnets: Permanent Magnets
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| A kind of strong permanent magnet: N52 Neodymium magnet 70x40 mm |
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| The type of permanent magnet used for experiments, and easily placed on the rotor of the generator |
Classification of Permanent Magnets By Material
Permanent magnets are known as pentagrams where objects are composed of hard magnetic materials capable of retaining magnetism. At the same time, they do not lose their magnetic fields, but are used as sources to generate magnetic fields.
However, many people do not know how permanent magnets are classified. And to help you answer that question, here's some background information on the types of permanent magnets based on the forming material.
Iron oxide
This is the first permanent magnet ever made, iron oxide magnets have been used in the form of rock magnets since ancient times and are readily available in nature. However, to this day, this type of magnet is not used anymore because the magnetism it produces is very weak. That means its application in manufacturing fields is very difficult.
Carbon steel
Carbon steel is known as a permanent magnet that was put into use from the 18th century to the 50s of the 20th century. With the ability to give more than 1T of residual magnetism, on the other hand, the coercivity of this magnet is very low, so the magnetism is also easily lost. Because of that, carbon steel magnets are gradually being used less and by now it seems to have disappeared.
AlNiCo Magnet
AlNiCo magnets are magnets made from hard magnetic materials that are alloys of nickel, aluminum, cobalt along with a combination of some other additives. It is worth mentioning that this type of magnet has a high residual magnetism but has a low coercive force along with the relatively high cost of this type of magnet, which limits its use.
Hard magnetic Ferrite
Known as permanent magnets made from hard magnetic ferrites which are ceramic materials. Ferrite magnets have many outstanding advantages such as high strength, easy processing, and relatively low cost. At the same time, they have a high oxygen content, so they have a relatively low level of magnetism, and the coercive force fluctuates around 3-6 kOe. Moreover, it is capable of maximum maximum magnetic energy storage not exceeding 6 MGOe. Therefore, this type of magnet accounts for nearly 60% of the market share of permanent magnets on the market today.
Rare earth magnets
These are permanent magnets made from hard magnetic materials based on rare earth applications. There are two main types of rare earth magnets: SmCo high temperature magnets and NdFeB magnets.
However, the disadvantage of rare earth magnets is that they are expensive, and have poor durability. Therefore, the application of magnets is only relative, especially in high-tech fields.
Nanocomposite magnets
Nanocomposite magnets are the newest type of magnets, they were manufactured and put into use in the last years of the last century. The nanocomposite magnet has a composite structure of two nanometer-sized hard and soft magnetic phases. According to experts' research, this is a type of magnet capable of storing huge magnetic energy three times higher than NdFeB magnets.
With the above information, hopefully you will have more useful knowledge about permanent magnets, a type of magnet widely used in our lives.
Permanent Magnet Generator - New Alternative Energy
Permanent magnet generators are a popular form of alternative energy that people are becoming more and more interested about. There is a lot of information online about these generators but you will also find many people out there who have doubts about this topic.
Recently, many new developments have come out with regard to these type of generators. The newer versions are more high tech than the originals. The new technology has been documented in books that tell people how to make it. This is changing some people's minds about solar and wind power. If you are looking for a clean source of alternative energy, you should find out more about this.
Magnetic Generator with Feedback Circuit - Base of Self-Powered Generator
Revealed At Last: Ancient Invention Generates Energy-On-Demand
✔ Nikola Tesla’s method of magnifying electric power by neutralizing the magnetic counter-forces in an electric generator
Generates Energy-On-Demand: Easy Power Plan Will Change Our World Forever
✔ Combination of induction motor and alternator
✔ Combine generators with induction motors - self-powered generators with rotary motion
✔ Various methods of generating high power immobile generators
✔ Or maybe called Overunity for the system. Mother Nature doesn't care about people calling or naming phenomena. Overunity or Free Energy, or Zero Point Energy (ZPE) are just a few different wordsIf you want to be able to power your home without paying energy bills and you are prepared to build this power generator yourself, you will need to get a good guide. You will find a number of guides that contain all the information you need to build step-by-step your own generator so you can save money on energy bills. With such a guide, your "perpetual machine" can be up and running in a week.
Related content: Free Energy Generator
