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Custom Permanent Magnet

Jan. 14, 2022

With the rapid development of low carbon economy, new energy vehicles, wind power generation and other energy-saving and environmental protection industry into a period of rapid development, for high-performance neodymium permanent magnet material has brought strong demand, buy magnets choose us, professional production of custom manufacturing of various types of magnets, large factory quality, to the picture to sample batch custom permanent magnet, production of a variety of shaped permanent magnet. magnet, factory direct supply. The middle link is eliminated, and the cost performance is higher. Welcome to inquire!


What is a permanent magnet definition?



The permanent magnet is a natural product, also known as a natural magnet, or it can be manufactured artificially (the strongest magnet is a NdFeB magnet). A material with a wide hysteresis line, high coercivity, and high remanent magnetism, which remains constant once magnetized. Also known as permanent magnets and hard magnetic materials. In applications, permanent magnets work in the second quadrant of the demagnetized part of the deep magnetic saturation and magnetization hysteresis line. Permanent magnets should have the highest possible coercivity Hc, remanence Br, and maximum magnetic energy product (BH) m in order to ensure maximum magnetic energy storage and stable magnetic properties.


Permanent magnet types



Permanent magnet materials can be divided into two categories: traditional permanent magnet materials, such as Alnico and ferrite, with low magnetic properties and low prices; and new rare-earth permanent magnet materials, such as samarium magnets (e.g. SmCo) and neodymium magnets (NdFeB), with high magnetic properties and high prices.

(1) Alloy permanent magnet materials

Including rare earth permanent magnet materials (NdFeB Nd2Fe14B), samarium cobalt (SmCo), aluminum nickel cobalt (AlNiCo)

(2) Ferrite permanent magnets (Ferrite)

Classification by production process

The different production processes are divided into

Sintered Ferrites: Sintered NdFeB magnets are produced by smelting through the airflow mill and have a very high coercivity value and a very high magnetic energy, the maximum magnetic energy product (BHmax) is more than 10 times higher than Ferrite. The mechanical properties are also very good, allowing different shapes to be cut and drilled. The maximum working temperature of the high-performance product is 200°C.

Due to its material content, it is prone to rust and corrosion, so the surface must be tinted in different ways depending on the requirements. (e.g. galvanized, nickel, environmentally friendly zinc, environmentally-friendly nickel, nickel-copper-nickel, environmentally friendly nickel-copper-nickel, etc.). Very hard and brittle, with high resistance to demagnetization, high cost/performance ratio, not suitable for high operating temperatures (>200°C).

custom permanent magnet

Bonded Ferrites: Bonded NdFeB is a composite NdFeB permanent magnet made by evenly mixing NdFeB powder with a binder such as resin, plastic or low melting point metal, and then compressing, extruding, or injection molding. The product can be formed in one go, without secondary processing, and can be made into various complex shapes directly. The bonded NdFeB has magnetic properties in all directions and can be processed into NdFeB compression molds and injection molds. High density, excellent magnetic properties, good corrosion resistance, good temperature stability.

Injection-molded ferrites: very high precision, easy to make thin-walled rings or thin magnets with complex anisotropic shapes

These three processes are divided into isotropic and anisotropic magnets depending on the orientation of the magnetic crystals.


Here are some permanent magnet examples:

Rare Earth Magnets

Rare Earth Magnets


Custom Block NdFeB Magnet


Custom Block NdFeB Magnet

Custom Neodymium Arc Magnet

Custom Neodymium Arc Magnet

By shape

Permanent magnets are available in a variety of shapes, such as standard rings, rods, and discs, as well as customized shapes such as trapezoidal, curved, beveled, and even "bowler hat" shapes.


Custom Round Magnet

Custom Round Magnet

Custom Ring Permanent Magnet with Hole

Custom Ring Permanent Magnet with Hole


What is a permanent magnet used for?-applications



Permanent magnets are used in a wide range of applications in electronics, electrical, mechanical, transport, medical and household products. They are used in wind power generation, new energy vehicles, inverter air conditioners, energy-saving lifts, intelligent manufacturing, subdivisions such as permanent magnets for loudspeakers and telephone receivers, magnetic systems for magnetoelectric meters, magnetic poles in generators and permanent magnet motors, permanent magnet devices for machine manufacturing (e.g. permanent magnetic suction cups for surface grinding machines), magnetic levitation systems, magnetic bearings, magnetic separation systems, magnetic ore dressing, magnetic water purification systems, magnetron tubes, magnetic systems for proton accelerators, etc. magnetic systems, etc.

permanent magnet for electronics, electricalpermanent magnet for new energy vehiclespermanent magnet for inverter air conditioners


Custom permanent magnet FAQ



Q1. What is a permanent magnet called?

A permanent magnet is an object that retains its magnetic properties for a long time without an applied magnetic field. Depending on the material, permanent magnets can be made from ferromagnetic materials such as iron and nickel, which of these materials will feel a force.

Q2. Which of these materials will feel a force from a permanent magnet?

Ferromagnetic metals are strongly attracted by a magnetic force.

Q3. What is the difference between a permanent magnet and an electromagnet?

Electromagnets (solenoids) are made by converting electrical energy into magnetic energy and then from magnetic energy into kinetic energy (electrical energy → magnetic energy → kinetic energy). The design of electrical energy, therefore, involves voltage, current, resistance, and power. The design of magnetic energy involves magnetic induction, magnetic flux, etc. The design of kinetic energy processes involves a three-dimensional relationship between stroke, force, and time.

The design and manufacture of electromagnets is therefore a very comprehensive industry, which, like resistors, capacitors, and relays, is classified as an electronic component and is used in a wide range of applications.

Permanent magnets can be natural, also known as natural magnets (a valuable national resource), or artificially manufactured (the strongest magnets are NdFeB magnets). A material with a wide hysteresis line, high coercivity, high remanence, and a constant magnetism once magnetized. Also known as permanent magnets and hard magnetic materials. In applications, permanent magnets work in the second quadrant of the demagnetized part of the deep magnetic saturation and magnetization hysteresis line. Permanent magnets should have the highest possible coercivity Hc, remanence Br and maximum magnetic energy product (BH) m to ensure maximum magnetic energy storage and stable magnetic properties.

Their points of difference.

The magnetic poles of an electromagnet can be changed, this is determined by the positive and negative poles of the energized solenoid and the direction of winding of the coil. Permanent magnets, on the other hand, have fixed N and S poles.

Q4. How to make a strong permanent magnet?

To make a permanent magnet, the ferromagnetic material is heated at incredibly high temperatures while being exposed to a strong external magnetic field. This causes the individual magnetic domains in the material to align with the direction of the external magnetic field until all the domains are aligned and the material reaches its magnetic saturation point. The material is then cooled and the aligned magnetic domains are locked in position. This alignment of the domains gives the magnet anisotropy. After the external magnetic field has been removed, the hard magnetic material will retain most of its domain alignment, forming a strong permanent magnet.

Q5. How does a permanent magnet work

How a permanent magnet works are all about its atomic structure. All ferromagnetic materials produce a naturally occurring, albeit weak, magnetic field generated by the electrons surrounding their nuclei. These groups of atoms can be oriented in the same direction, and each of these groups of atoms is known as a single magnetic domain. Like all permanent magnets, each magnetic domain has its own north and south pole. When a ferromagnetic material is not magnetized, its magnetic domains point in a random direction and their magnetic fields cancel each other out.

Q6. How much does a permanent magnet cost?

It varies considerably from material to material. In the case of ferrite, it is mainly the cost of the tooling, so please feel free to ask us for a specific price.

how long does a permanent magnet last

A permanent magnet is, as the name suggests, an object that retains its magnetic properties for a long time without an applied magnetic field. After 11.6 years of use under normal conditions, the Alnico flux loses 5% of its magnetic flux, the ferrite loss cannot be measured.


Permanent magnet sales by factory

Permanent magnet manufacturers have a first-class production line, high precision and good quality products, welcome to discuss! Our permanent magnets have been widely used in the fields of electroacoustics, motors, instruments, meters, automatic control, etc.


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