Magnetic domains locked in, result in the ability of a permanent magnet to support an external magnetic field. Once established these domain positions are held until acted upon by forces exceeding those of the locked domains. The energy required to change the magnetic field produced by...
Evil geniuses, commence drooling. Scientists have figured out how to remotely control a cell’s self-destruction. Magnets that guide the behavior of tiny metal beads can be used to flip on a cell’s death switch, kick-starting the cell’s demolition. The approach might one day be...
Parents, doctors and caregivers need to know that if a child swallows small, high-powered magnets, life-threatening problems can result, Canadian pediatricians warn.
Rare-earth magnets were created in the 1980s that are 10 to 20 times stronger than traditional magnets and are now widespread in...
A permanent magnet is a magnet because of the orientation of its
domains. Domains are the small magnetic field inherent in the
crystalline structure of ferromagnetic materials. Ferromagnetic
materials are the only substances capable of being made into magnets
they are normally iron, nickel,...
It seems that the number one question in the magnet industry is, “What will be the trend in rare earth raw material prices next year?†Nobody wants to experience the pain felt in 2011. And I doubt that we will.
The permanent magnet industry will start to see the beginning of the...
Yet, sometimes people will feel confuse between permanent magnet motor and magnet motor. In fact, the mechanism between these two types of magnet motors is still the same. The permanent magnet motor is more specific if compare to magnet motor. It is powered solely via the permanent magnet. The...
Magnets are very “attractive†and interesting elements. One of the earliest natural forces that humans stumbled upon was most probably magnetism, although it has been relatively recent that the dormant potential of the properties of magnetic substances have been realized.
Many...
A Ferrite magnet is a category of permanent magnet. Its major constituent is Iron (III) oxide. It is the simplest of all existing permanent magnets and therefore also lower in cost compared to them. They are also used as magnetic cores for transformers among other applications. They are hard and...
The Ferrite permanent magnet is also known as a Ceramic Magnet and even as hard ferrite magnet. The name is interchangeable but they all refer to exactly the same material type. They are known as Ceramic Magnets because they are electrically insulating. Ferrite permanent magnets exist in two forms...
A permanent magnet is a magnet that is permanent, in contrast to an electromagnet, which only behaves like a magnet when an electric current is flowing through it. Permanent magnets are made out of substances like magnetite (Fe3O4), the most magnetic naturally occurring mineral, or neodymium, a...
A neodymium magnet (also known as NdFeB, NIB, or Neo magnet), the most widely used type of rare-earth magnet, is apermanent magnet made from an alloy of neodymium, iron, and boron to form the Nd2Fe14B tetragonal crystalline structure.Developed in 1982 by General Motors and Sumitomo Special...
The method of manufacture of Neodymium Iron Boron magnets is as follows:-
The Neodymium metal element is initially separated from refined Rare Earth oxides in an electrolytic furnace. The “Rare Earth†elements are lanthanoids (also called lanthanides) and the term arises from the...
Neodymium is a kind of fairly rare metal which is used in high grade magnets, Due to the increased demand, its prices rised since recent years.
Neodymium serves as a constituent of high strength neodymium magnets. Neodymium magnets is widely used in loudspeakers, computer...
Many devices such as televisions, telephones, computers, clocks and watches, heart pacemakers, or other small appliances are sensitive to the effects of magnets and can be damaged or ruined if you do not protect them against magnetism. Some audio speakers and radios incorporate magnets into their...
Medical magnets are rapidly gaining popularity all to do with recurring pain. Magnetic therapy has been around for a long time, and gradually returns to the treatment of many disorders. If you do not know much about magnets can obtain information and to find a new method for dealing with...
Bonded neodymium magnets are manufactured from an Isotropic material which is compression moulded and can be machined into complex shapes. The major advantage over other Rare Earth magnets is it can be magnetised in any direction, and have multi poles. The one disadvantage is it is poor resistance...
The basic principle of the holding or pot magnet is to direct and concentrate the flux from both magnetic poles to one active face. This is usually achieved with steel pole pieces or a steel-backing cup. Pot magnets are made predominately made from three types of magnetic material
Sintered...
A magnet can be magnetized in a variety of directions. The diagrams below depict various magnetic orientations available during the manufacture of magnets. These orientations may be available in isotropic and some anisotropic...
If the burden of two systems of measurement for common quantities (English vs. metric) throws your mind into confusion, this is not the place for you! Due to an early lack of standardization in the science of magnetism, we have been plagued with no less than three complete systems of measurement...
The discovery of the relationship between magnetism and electricity was, like so many other scientific discoveries, stumbled upon almost by accident. The Danish physicist Hans Christian Oersted was lecturing one day in 1820 on the possibility of electricity and magnetism being related to one...
Each permanent magnet material discussed above has its own pros and cons. How to choose the right one for your particular application is a challenge to any user. A balance between cost and performance must be considered in selecting of permanent magnet material. In Reference Information section...
Mapping the magnetic field of an object is simple in principle. First, measure the strength and direction of the magnetic field at a large number of locations (or at every point in space). Then, mark each location with an arrow (called a vector) pointing in the direction of the local magnetic field...
Permanent magnets are objects that produce their own persistent magnetic fields. They are made of ferromagnetic materials, such as iron and nickel, that have been magnetized, and they have both a north and a south pole.
Magnetic field of permanent magnets
Main articles: Magnetic moment and Two...
My company will be exhibiting at HANNOVER MESSE 2013
Exhibition Date: 8-12 April, 2013Exhibition Booth No.: H14-J02Visiting Hours: 9:00 to 18:00Exhibition Venue: Messegelände, D-30521 Hannover, Germany
Welcome new and old customers come to visit. We meet in Hannover!
HANNOVER MESSE...
Permanent magnet motor
Abstract
A permanent magnet motor which generates mechanical output power by the repulsion forces between a movable permanent magnet and a fixed permanent magnet. A movable magnetic shield is interposed between the magnets when they are adjacent one another and then the...
Synchronous motor elements with permanent magnet rotors are a powerful drive for your spindle. They can achieve extremely high torques and maximum speeds (up to 250,000 min-1). These products are characterised by large rotor bores, low rotor temperatures, maximum power densities and extremely short...
Asynchronous motors are established in many branches of industry and are affordable, robust and characterised by a high power density. In the low-voltage range they are designed for any given voltage and frequency. Whilst taking the requirements of our customers into account we can also maximise...
e+a Permanent magnet motor
This website gives a short overview of electrical machines used as permanent magnet motors and generators, their advantages and some application fields especially in the high speed domain. Here, a permanent magnet motor is supposed to be a synchronous machine with a...
Rare earth magnets have been available since the 1970's; the first being samarium cobalt (SmC0) which is still favored for high temperature applications (300C) but have otherwise largely been supplanted by neodymium iron boron (NdFeB). Rare earth magnets come in all shapes and sizes including...
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