Inductors & Magnetic Devices

The Main Introduction of Plastic Magnets

Plastic magnets are an increasingly popular choice for new products, increasing performance or reducing costs. Normally, plastic bonded magnets are compression moulded to net shape and due to the high tolerances achieved, require no further machining. The high magnetic values and reduced size of plastic magnets make them ideal for miniaturization where weight and space are at a premium.

 

In addition to our standard grades, we can offer special blended grades where the remanence and energy product of the magnet is optimised for customer’s specific applications whilst maintaining the same high resistance to demagnetisation and elevated temperature properties as the standard grade. In addition new isotropic and anisotropic powders are becoming available that have been optimised for higher temperatures, high density or low cost applications.


Safety Usage of Portable Generator

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The portable generator is a device that backup the electricity in emergency. Portable generator manufacturer offers well advices for users. You can follow the tips while using the portable generators in safely and appropriate operation. Below are several methods recommended.  

First, just do not use portable generator at home due to the emission of carbon-monoxide. Second, follow portable generator manufacturer’ suggestions to install the portable generator. Third, plug appliances directly into the generator’s outlet. Finally, use the proper cord to suit for the generator; for instance, use a heavy-duty extension cord for outdoor use to keep the safely usage.

How to Replace a TV Power Cable?

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The power cable of TV is easy to get damaged during moving. While falling off the cable will be out of work. So, in the meantime we can replace it by our own. It is simple to get started. For the first step is to know the shape of the female plug enabling to meet the right outlet.

Instructions

1

Bring the broken power cable with you and get a replaced one from an electronics store. Per TV power cable is equipped with a male plug and a female plug. The former one inserts into the wall outlet, and the later one inserts into the back of the TV.
2

If you lost your power cable during moving, just go over the TV’s owner manual or look at the back of TV to check the model number there. And then search for this type of power cable at an electronics store.

3

Search online for the TV type, model number and power cable. To ensure if the female end can insert into the outlet on the back of the TV via checking the picture online.

4

Have a phone call with producer to get further information about where you can buy another TV power cable. Although producers sell indirectly to the public, they offer other places for dealerships to sell products. Hence, we can buy the plug through dealerships who will order from producers.

5

Replace an appropriate power cable with the female plug which fits into your TV. These cables are cheaper than the normal cables and are easy to get one. You can find these power cables online or at electronics store.


NdFeb Magnets

image from www.ndfebmagnet-china.com

Known as third generation of Rare Earth magnets, Neodymium Iron Boron (NdFeB) magnets are the most powerful and advanced commercialized permanent magnet today. Since they are made from Neodymium, one of the most plentiful rare earth elements, and inexpensive iron, NdFeB magnets offer the best value in cost and performance.

Applications of NdFeB magnets are: magnetic separators, linear actuators, microphone assemblies, servo motors, DC motors (automotive starters), computer rigid disc drives, printers and speakers. 


NdFeb Magnets

image from upload.wikimedia.org

NdFeb Magnets are made from an alloy containing, amongst others, the elements Neodymium, Iron and Boron (NdFeB). The NdFeB magnets are the strongest type of magnet commercially available and are manufactured in a wide range of shapes, sizes and grades. We offer 47 grades of licensed Neodymium Iron Boron with 25 types of surface /coating finish for each grade.

The NdFeB magnets are anisotropic sintered magnets – the alloy is jet milled to a fine powder and is then compacted in the presence of a magnetic field to give it a preferred direction of magnetisation (making it anisotropic in performance). The NdFeB magnets are then sintered to fuse the powder together before final machining and magnetising produces the completed super strength Neodymium magnet.


Rare Earth Magnets

image from i00.i.aliimg.com

 

The rare earth magnets are metals that are ferromagnetic, meaning that like iron they can be magnetized, but their curie temperatures are below room temperature, so in pure form their magnetism only appears at low temperatures. However, they form compounds with the transition metals such as iron, nickel, and cobalt, and some of these have Curie temperatures well above room temperature. Rare earth magnets are made from these compounds.

The advantage of the rare earth compounds over other magnets is that their crystalline structures have very high magnetic anisotropy. This means that a crystal of the material is easy to magnetize in one particular direction, but resists being magnetized in any other direction.

Atoms of rare earth elements can retain high magnetic moments in the solid state. This is a consequence of incomplete filling of the f-shell, which can contain up to 7 unpaired electrons with aligned spins. Electrons in such orbitals are strongly localized and therefore easily retain their magnetic moments and function as paramagnetic centers. Magnetic moments in other orbitals are often lost due to strong overlap with the neighbors; for example, electrons participating in covalent bonds form pairs with zero net spin.


NdFeB Magnets

Neodymium Magnets are made from compound containing the elements of Neodymium, Iron and Boron (NdFeB). The NdFeB magnets are the strongest type of magnet commercially available and are manufactured in a wide range of shapes, sizes and grades.

The NdFeB magnets are anisotropic sintered magnets-- the compound is jet milled to a fine powder and is then compacted in the presence of a magnetic field to give it a preferred direction of magnetisation (making it anisotropic in performance). The NdFeB magnets are then sintered to fuse the powder together before final machining and magnetising produces the completed super strength Neodymium magnet.

The Neodymium magnets are also known as Neo magnets, Neodymium Iron Boron magnets, Neodymium-Iron-Boron magnets, NdBFe magnets, NdFeB magnets, NIB magnets, Super Strength magnets and Rare Earth magnets (please note that SmCo is also called a Rare Earth magnet). NdFeB is called a Rare Earth magnet because the Neodymium is a Rare Earth element, having a value of 60 on the Periodic Table. For note, there is nothing rare about Rare Earth magnets – the required elements are readily available and the NdFeB magnets are produced in several hundreds of tonnes each year.


Rare Earth Magnets

image from i00.i.aliimg.com

Rare earth magnets are strong permanent magnets made from compounds of rare earth elements. Developed in the 1970s and 80s, rare-earth magnets are the strongest type of permanent magnets made, producing significantly stronger magnetic fields than other types such as ferrite or alnico magnets. There are two types: neodymium magnets and samarium-cobalt magnets. Rare earth magnets are extremely fragile and also vulnerable to corrosion, hence are usually plated or coated to protect them from breaking.

 

The term “rare earth” can be misleading as these metals are not particularly rare or precious—they are about as abundant as tin or lead. The unparalleled strength of neodymium magnets is only possible due to a sophisticated and delicate arrangement of atomic particles and their electron spin. The process to produce these technological marvels is no less sophisticated or delicate.


Permanent Magnet

image from farm9.staticflickr.com

Magnet is a material that provides magnetic field. A magnetic field is invisible, however, responsible for most notable property of a magnet: a force that pulls on other ferromagnetic materials, such as iron, and attracts or repels other magnets.

permanent magnet is an object made from the material that is magnetized and creats its own persistent magnetic field. An every day example is a refrigerator magnet used to hold notes on the door. Materials that can be magnetized, which are also the ones that are strongly attracted to a magnet, are called ferromagnetic. These include iron, nickel, cobalt, some alloys of rare earth metals, and some naturally occurring minerals such as lodestone. Although ferromagnetic materials are the only ones attracted to a magnet strongly enough to be commonly considered magnetic, all other substances respond weakly to a magnetic field, by one of several other types of magnetism.

 

Ferromagnetic materials can be divided into magnetically “soft” materials like annealed iron, which can be magnetized but do not tend to stay magnetized, and magnetically hard materials, which do. Permanent magnets are made from “hard” ferromagnetic materials such as alnico and ferrite that are subjected to special processing in a powerful magnetic field during manufacture, to align their internal microcrystalline structure, making them very hard to demagnetize. To demagnetize a saturated magnet, a certain magnetic field must be applied, and this threshold depends on cercivity of the respective material. “Hard” materials have high coercivity, whereas “soft” materials have low coercivity

 

The overall strength of a magnet is measured by its magnetic moment or, alternatively, the total magnetic flux it produces. The local strength of magnetism in material is measured by its magnetization.