everbeen magnet

Cow magnets

Cow magnets are popular with dairy farmers and veterinarians to help prevent Hardware Disease in their cattle. While grazing, cows eat everything from grass and dirt to nails, staples and bits of bailing wire (referred to as tramp iron). Tramp iron tends to lodge in the honeycombed walls of the recticulum, threatening the surrounding vital organs and causing irritation and inflammation, known as Hardware Disease. The cow loses her appetite and decreases her milk output (dairy cows), or her ability to gain weight (feeder stock). Cow magnets help prevent this disease by attracting stray metal from the folds and crevices of the rumen and recticulum. One magnet works for the life of the cow!

Alnico magnets are made primarily from aluminum,nickel,cobalt,copper,iron and sometimes titanium. They can be either cast or sintered.

Applications of Alnico Magnets:

Separators
Sensors
Electron tubes
Traveling wave tubes
Radar
Holding magnets
Clutches and bearings
Motors
Relays
Controls
Generators
Receivers
Telephones
Microphones
Bell ringers
Loudspeakers
Cow magnets
Educational products

Attributes of Alnico:

Very temperature stable,great for high heat applications
Working temperature can reach 550-600 oC
Does not lend itself to conventional machining (hard and brittle)
High residual induction and energy product compared to ceramic material
Low coercive force compared to ceramic and rare earth materials (more subject to demagnetization)

Samarium Cobalt Magnets

Samarium cobalt magnets (SmCo) are composed of samarium, cobalt and iron. These rare earth magnets are extremely strong

for their small size, metallic in appearance and found in simple shapes such as rings, blocks and discs.

Applications of Samarium Cobalt Magnets:

Computer disc drives
Sensors
Radar
Traveling wave tubes
Satellite systems
Motors where temporary stability is vital Attributes of Samarium Cobalt Material
High resistance to demagnetization
High Energy Product
Good temperature stability
High resistance of corrosion and oxidation
Expensive material (cobalt is market price sensitive)

Cermaic Magnets

Ceramic (ferrite) magnets are composed of strontium carbonate and iron oxide. They are charcoal gray in color and usually appear in the forms of discs,rings,blocks,cylinders,and sometimes arcs for motors.

Applications of Ceramic Magnets:

Speaker magnets
DC brushless motors
Magnetic Resonance Imaging (MRI)
Magnetos used on lawnmowers and outboard motors
DC permanent magnet motors (used in cars)
Separators (separate ferrous material from non-ferrous)
Used in magnetic assemblies designed for lifting,holding,retrieving and separating
Magnetic Door Catcher
Instrument and Meters
Toys
Arts and crafts

Attributes of Ceramic Magnets:

Least expensive material compared to alnico and rare earth magnets
High intrinsic coercive force
Available in simple shapes only due to manufacturing process
Lower service temperature than alnico,greater than rare earth
Lower energy product than alnico and rare earth magnets
Most common grades of Y25,Y30,Y30H-1,Y30H-2,Y32,Y33 ceramic are 1,5 and 8 (1-8 possible)

Tolerances:

For as pressed material,tolerance on the thickness (direction of magnetization) is ± .005inch. Other dimensions are ± 2% or ± .010inch,whichever is greater.

Rubber magnets

Rubber magnets is compounded by magnetic powder and high polymer materials through the special craft. It has some advantages in magnet shaping, size precision, flexibility etc. It may take the strip, circular, various geometric figured, sheet,coiled material (max. width 620mm, thickness0.4-8mm, unlimited length) according to the customer’s requirements. Its surface may implement UV oil coating, spray lacquer, printing, lamination, double-faced adhesive tape, PVC processing and etc.

Applications of Rubber Magnet:

Small size precise motor
Refrigerator door sealing strip
Bathroom door sealing strip
Toy
Stationery
Advertisement propaganda
Print

Magnetic strip:

The magnetic strip is used in refrigerator, bathroom, window and advertisement, It can be made over ten specification with strip and R, T,concave shape. We also can produce them according to the customer’s design and requests.

Fridge magnet:

Fridge magnet is rubber magnets adhered to various kinds of PVC. PP, double-sided tape. The colors are various . It is normally used on Logo, children’s toys, gifts and advertising . The design can be decided according to customers' need.

Neodymium magnets (Ndfeb) are composed of neodymium, iron, boron and a few transition metals. These magnets are extremely strong for their small size, metallic in appearance and found in simple shapes such as rings, blocks and discs. Their max energy product can be 35MGOe~50MGOe , Neodymium magnets are developed rapidly and applied widely due to their perfect characteristic, rich raw material resource and reasonable price.

Applications of Sintered Neodymium Magnets:

Magnetic separators
Microphone assemblies
Servo motors
DC motors (automotive starters) and other motors
Computer rigid disc drives
magnetic resonance imaging
Various holders
Toys
Meters
Odometer
sensors

Attributes of Neodymium Material:

Very high resistance to demagnetization
High energy for size
Good in ambient temperature
Moderately priced
Material is corrosive and should be coated for long term maximum energy output
Low working temperature for heat applications, but higher levels of heat resistance materials are being introduced periodically

permanent magnetic material

Has a wide hysteresis loop, high coercivity and high remanence, which can be magnetized by a constant magnetic materials. Known as hard magnetic materials. Practical, in-depth work of permanent magnet material and magnetic saturation magnetization hysteresis loop after the second quadrant of the demagnetization. Permanent magnet materials commonly used aluminum into permanent magnet alloy of nickel and cobalt, iron magnetic cobalt-chromium alloy, hard ferrite, rare earth permanent magnet materials and composite permanent magnet materials.

① AlNiCo of permanent magnet alloy. Iron, nickel, aluminum elements as the main component, but also contains copper, cobalt, titanium and other elements. Remanence with high and low temperature coefficient, magnetic stability. - Casting alloys and alloy powder sintering two. 20th Century 30 ~ 60 more in the application, is used for industrial instrumentation in the manufacture of magnetic-electric instruments, flow meters, micro motors, relays, etc..

② FeCrCo of permanent magnets alloy. Iron, chromium, cobalt element for the major components, also contain a small amount of molybdenum and titanium, silicon. Its processing performance and thermoplastic can be cold deformation, and the magnetic properties similar to the magnetic nickel and cobalt aluminum alloy, and through the plastic deformation and heat treatment can improve the magnetic properties. Section used in the manufacture of various small, complex-shaped components of small magnets.

③ permanent magnetic ferrite. Mainly barium ferrite and strontium ferrite, the resistivity high coercivity, can be effectively used in air-gap magnetic circuit, especially suited for small generators and the permanent magnet motor. Hard ferrite non-precious metals nickel, cobalt, rich source of raw materials, the process is simple, low cost, can be a substitute for aluminum nickel and cobalt permanent magnet manufacturing magnetic separation, magnetic thrust bearing, speakers, such as microwave devices. However, the lower its maximum energy product, poor temperature stability, texture than crisp, fragile, impatient shock and vibration, it is not appropriate for measuring instruments and precision requirements of the magnetic devices.

④ rare earth permanent magnet materials. Cobalt is rare earth permanent magnet materials and Nd-Fe-B permanent magnet materials. The former is rare earth elements cerium, praseodymium, lanthanum, neodymium and cobalt, such as formation of intermetallic compounds, the energy product up to 150 times more than carbon steel, aluminum nickel and cobalt permanent magnet materials 3 to 5 times, hard ferrite 8 ~ 10 times, low temperature coefficient, magnetic stability, and the coercivity of up to 800 1000 / m. Mainly used for low-speed torque motor, activated motors, sensors, such as magnetic bearings pushed the magnetic system. Nd-Fe-B permanent magnet material is a third-generation rare earth permanent magnet material, remanence, and the coercivity of the largest energy product than the former, non-friable, better mechanical properties of the alloy with low-density, magnetic components to the light , thin, small and ultra-small. However, its magnetic temperature coefficient higher, limiting its application.

⑤ permanent magnets material from the compound of permanent magnet material and as a powder binder from the plastic composite material. Because they contain a certain proportion of binder, so the magnetic properties than the corresponding binder did not significantly reduce the magnetic material. In addition to permanent metal composite materials, other composite materials because of the permanent magnet of the heat-resistant adhesive constraints, the use of lower temperatures, less than 150 ℃. But the size of permanent magnet material and high precision, good mechanical properties, the magnet properties of the various parts of the uniform, and easy to approach and multi-radial magnet magnetization. Mainly used in the manufacture of instrumentation, communications equipment, rotating machinery, and sports equipment such as magnetic.

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Nd-Fe-B magnets and magnetic role

First, the history of the magnetized water

Four basic nature of magnetic force is one of the four great inventions in ancient China, one of the compass, is the ingenious application of the magnetic example. Physician Li Shizhen in the early Ming Dynasty 500 years ago found that the magnetic treated water is "to sore fistula, a long skin," and "there is a long drink of, and are advised to liquor," and "impotence" effect ( see the "Compendium of Materia Medica" pages 583-586), to keep fit, the treatment of many diseases. However, the ancients used by naturally occurring magnetic materials is a natural magnet - magnetite, and its magnetic properties of magnetic materials with modern synthetic compared with very low.

Second, the strongly magnetic high Wang - NdFeB

In 1983, the third generation of Nd-Fe-B Na-Fe-B birth of their ordinary magnet magnetic field intensity is more than 10 times, up to more than 10 years of life, human society is so far found energy product (MGOE) the highest-yong Magnetic materials, known as "PM Wang." Widely used in national defense and space technology, microwave, communications, electronics, health care and other high-tech fields.

Third, the Nd-Fe-B principle of cleaning antiscale

Nd-Fe-B by high-strength magnetic water treatment, water molecules bond angle and length of the simultaneous deformation, hydrogen bonding angle decreased from 105 degrees to 103 degrees, the water series of physical and chemical nature of change, water solubility and activity significantly increase the calcium carbonate in the water in the cooking process of decomposition of the soft generate lower calcium bicarbonate, it is not easy accumulated in the wall, easily removed by water. Another water to raise the degree of polymerization, the material was dissolved solid particles become more careful, detailed particle, two smaller distance between the ions, it is not easy condensation in the wall, so as to achieve the effect of fouling.

Fourth, the illnesses and health principles NdFeB
Because of the difference between the environment, the water content of different minerals, the water level of harmful substances has greatly affected our lives and health. Calcium and magnesium salt water, such as insoluble, affecting animals, plants absorption and photosynthesis, a large number of scientific experiments and practice prove "Wokai" in the high-strength magnetic Nd-Fe-B change the surface tension of water, density, force dissolved , and other physical properties, such as the acid-base chemical properties have a significant impact on magnetization of hydropower to increase the activity of the water permeability and biofilm, regular consumption can be physical health, conditioning the body's micro-circulation system, digestive system, endocrine system and nerve function and enhance human immunity, prevention and treatment of various diseases. The high strength of the magnetized water, water molecules are activated, the oxygen content of high: 1, Chang Yin biofilm increased permeability, lower blood viscosity, blood vessels to maintain flexibility and prevent thrombosis, the prevention and resolution of stone; 2. Regular consumption can keep fit, improve human immunity, anti-aging, the prevention and treatment of various diseases, and to accelerate the promotion of human epidermal metabolism, commonly used can change your skin smooth tender, beauty as people.

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Magnetic Glossary

1. Residual Induction, Br

Flux density, measured in gauss, of a magnetic material after being fully magnetized in a closed circuit.

2. Maximum Energy Product, BHmax

The maximum product of (BdHd) which can be obtained on the demagnetization curve.

3. Intrinsic Coercive Force, iHc

Oersted measurement of the material’s inherent ability to resist self-demagnetization.

4 Coercive Force, Hcb

The demagnetizing force, in oersteds, required to reduce the residual induction, Br, of a fully magnetized magnet to zero

5.Maximum Operating Temperature
The maximum temperature of exposure that a magnet can forego without significant long-range instability or structural changes

6.Curie Temperature

Temperature at which a material loses its magnetic properties

7.Gauss

Unit of measure of magnetic induction, B, or flux density in the CGS system.

8.Gaussmeter

instrument that measures the instantaneous value of magnetic induction, B. Its principle of operation is usually based on one of the following: the Hall effect, nuclear magnetic resonance (NMR), or the rotating coil principle.

9.Magnetic induction ,B

the Flux per unit area of a section normal to the direction of the magnetic path. Measured in gauss.

10.demagnetization curve

Also known as the BH Curve,It is the second (or fourth) quadrant of a major hysteresis loop. Points on the normal curve are designated by the coordinates Bd and Hd.Generally describing the behavior of magnetic characteristics in actual use.

11.Magnetic Flux

The magnetic induction(B) over an area(A), when it is uniformly distributed and is normal to the area.

12.Keeper

A soft iron piece temporarily added between the poles of a magnetic circuit to protect it from demagnetizing influences. Also called a shunt. Not needed for Neodymium and other modern magnets.

13.What is a magnet?

A magnet is an object that is made of materials that create a magnetic field. Magnets have poles,Every magnet has at least one north pole and one south pole.

14.magnetic poles

The points, or poles, where their magnetic strength is concentrated. We label them north and south because suspended magnets orient along north-south planes. On different magnets, like poles repel each other, opposite poles attract.

15.North Pole

That magnetic pole which attracts the geographic North Pole

16.magnetic field

A magnetic field is the region in space where a magnetic force can be detected. The magnetic field strength and direction can be measured in terms of strength and direction.

17.Anisotropic (oriented)

The material has a preferred direction of magnetic orientation.

18.Isotropic (non-oriented)

The material has no preferred direction of magnetic orientation, which allows magnetization in any direction.

The definition of magnets

The magnet is not invented, natural magnetite, first discovered and the use of magnets should be Chinese. Therefore, the "compass" is one of the four great inventions of the Chinese people. As for the component that is iron, cobalt, nickel, etc., with the special structure of atoms, atomic itself with magnetic moment. General confusion with these mineral elements. Magnetic zones on magnetic affecting each other .. but outside (such as magnetic field) guided elements consistent with the direction of trend on the show .. Magnetic. also known as magnets. Fe, Co and Ni is the most commonly used magnetic material is basically permanent magnets and magnet-soft iron permanent magnet is coupled with strongly magnetic material so that the spin magnetic and electronic Kok with momentum into fixed direction is coupled with soft magnetic current (also a plus magnetic method), and other current iron will gradually removed soft magnetic As for the loss of the first magnet who discovered the oldest documented Chinese Yellow Emperor is a guide to war so Chiyou as one of China's four great inventions! China in a century BC magnet polarization that is aware of the situation. Warring States era, he used a natural magnet, on a scale of, used for divination. Two methods used by the Northern Song Dynasty create artificial magnet, a kind of iron is hot needles placed in the North-South direction, rapid cooling, the use of the Earth's magnetic field will be magnetized iron pin; another magnet is used iron needle from friction. "Meng Xi Bi Tan," documented the existence of magnetic declination, found under the influence of magnetic declination, the compass needle pointing south, than the SouthEast genuine. Based on this knowledge, and will be developed as a compass magnet for scientific applications. Magnet is a generic term that generally refers to a magnetic things, the actual composition may not necessarily contain iron. Pure metal than the state itself without permanent magnetic iron, only near the permanent magnet will have a magnetic induction. A permanent magnet inside the general increase in other impurity elements (such as carbon) to make magnetic stabilized, but it would reduce the freedom of electronic conductivity and difficult, so when the current through the lamp-up. Rail is a common zone of magnetic elements, but many other elements have a stronger magnetic, like many powerful magnet Rubidium is a mixture of iron boron.

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The development prospects of micro-motor in the automobile industry

1. The micro-motors is applied in automotive engine parts. It is primarily used in automotive starter, EFI control system, engine and the radiator tank, and generator. These parts will use many DC motors.

2, The micro-motor is applied in automobile chassis frame. It is mainly used in the automotive electronic suspension control system, electric power steering devices, vehicle stability control systems, automotive Shunheng control systems, anti-lock control system and drive the power control system. The permanent magnet DC motor or permanent magnet stepper motors are widely used in them.

3, The micro-motor is applied in auto body parts. It is mainly used in the central locking devices, electric rearview mirror, automatic landing antenna, electric sunroof, automatic headlamps, electric vehicle seat adjustment, electric glass risers, electric wipers, air conditioning systems, electrical electronic speed process, etc.. The permanent magnet DC motors or permanent magnet stepper motors are usually used in them.

4, The micro-motor is applied in Auto Accessories. It is mainly used in the vacuum cleaners, inflatable machine, pump, polishing machine, electric massage chairs and other devices.

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The development of three key products for mirco-motor

As micro-motor industry is fully open market economy competitive industry, these enterprises will strengthen development of new product technologies and intellectual investment continually. In order to meet user’s needs, they will develop various high-grade new products. It includes the following three types.
First is the development of high-grade precision micro-motor, such as high-grade precision brushless DC motor, AC servo motor, stepper motor, linear motor, motor with gear, special micro-motor and so on. It will fill the gaps, instead of import.
Second, when they develop the micro-motor, they will strengthen research development of motor drive control, to form micro-motor mainly, including driver controller and other integrated products. Such brushless DC motor drive system, stepper motor drive, digital AC servo drive system and so on. Especially the application of brushless DC motor system will be developed further.
The third is development of special motor. With the improvement of domestic industry automation and modernization, many fields need special motor to realize energy conversion. Such as wind power systems, microelectronic mechanical systems, hybrid vehicles and electric vehicle drive system.

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