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How to consider the specifications and types of magnets

When choosing NdFeB magnets, customers should choose the magnet trademark suitable for them according to their working temperature. If the working temperature is higher than the...

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Future market of neodymium iron boron

Permanent magnet synchronous motors are widely used in pure electric and hybrid passenger cars. The high-performance neodymium iron boron magnetic material used in permanent magnet synchronous motors is about 1.8 kilograms. Considering the 60% consumption from raw materials to finished products, this part reaches 3 kilograms. In addition, the usage of EPS and other components reaches about 0.4 kilograms. Therefore, the usage of pure electric bicycles is about 3.4 kilograms, and the usage of hybrid bicycles is about 2.2 kilograms. Given the high energy conversion efficiency and low energy consumption of permanent magnet synchronous motors, the volume of permanent magnet synchronous motors is smaller and the efficiency is higher at the same power. It is expected that more electric vehicle models will use permanent magnet synchronous motors in the future, coupled with more vehicle models equipped with dual motor structures. There is room for further improvement in the single vehicle usage

16

2024-01

Neglected TWS core component with poor expectations: magnet

The TWS earphone industry chain has been booming recently. Currently, the TWS Bluetooth earphones on the market are quite diverse, and almost every company is designing, manufacturing, and producing this popular product, TWS Bluetooth earphones. But there is still unexplored virgin land, and there is a significant expectation gap, which is the magnet.Through disassembly, it can be seen that at least two magnets are needed for the charging case of each TWS earphone, and one magnet is required for each corresponding earphone. So each pair of headphones requires 4 magnets. Earphone magnet.In addition to headphones, a greater potential demand lies in smartwatches. Similarly, by dismantling the three WATCH, it was discovered that there are 6 magnets in the charging dock! At least 3 pieces are needed inside the watch!Let's take a look at the knowledge that a qualified structural engineer needs to know about the structure of headphones:As an essential electronic component for headphones,

16

2024-01

Magnet magnetic field orientation

Introduction to magnetization: 1. The magnetization methods of neodymium iron boron magnets mainly include axial magnetization, radial magnetization, thickness direction magnetization, axial multi-stage magnetization, inner circle radiation magnetization, radiation magnetization, and other methods.The magnetization process of neodymium iron boron is simple. Generally, the magnetizable object to be magnetized is placed in the magnetic field formed by a coil with direct current passing through it, and magnetized through a magnetizing machine. The process of magnetization is completed with just a gentle step of the foot (or a long press of the hand for one to two seconds).Magnetic materials are divided into two categories: isotropic magnets and anisotropic magnets. The magnetic properties of isotropic magnets are the same in any direction and can be freely attracted together; The magnetic properties of anisotropic magnets vary in different directions, and the direction in which magnetic p

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2024-01

How to choose strong magnetism

1、 Classification of commonly used magnets1. Ferrite magnet. Due to the cheap materials, the price of ferrite is very low, and it is widely used in handbag packaging factories, speaker factories, and leather product factories.2. Neodymium iron boron magnet. High cost-effectiveness, although its quantity is not as large as ferrite, it has the highest output value. It is involved in various industries, and Dahua Magneto Electric Company produces various precision and strong magnetic products, which are widely used in magnetic connectors, DC motors, robots, smart homes, Bluetooth earphones TWS and other fields.3. Aluminum nickel cobalt magnets are more commonly used in products.4. Samarium cobalt magnet. High cost, only used in some permanent magnet motors.2、 The size of the magnetic force of commonly used magnets1. Neodymium iron boron. The third-generation rare earth permanent magnet product is currently a type of magnetic material, known as strong magnet, strong magnet, permanent magne

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2024-01

High temperature magnets play an irreplaceable role in modern industries

A high-temperature magnet is a magnetic device that can maintain a stable magnetic field in high-temperature environments. In many industrial and scientific applications, magnets need to be used under high temperature conditions, while traditional permanent magnets, electromagnets, and soft magnetic materials will have reduced magnetism at high temperatures. Therefore, high-temperature magnets are widely used as a new type of high-temperature magnetic material in industries such as steel, casting, chemical industry, aerospace, etc.High temperature magnets can be divided into two types: one is based on permanent magnet materials, and the other is based on ferrite materials. Rare earth permanent magnet materials are commonly used as permanent magnet materials, and an important characteristic of these materials is their high rebound force and coercivity, which enables them to maintain stability under high temperature conditions. Ferrite materials are high-temperature resistant materials t

15

2024-01

The magnetization method of magnetic materials

1. Unsaturated magnetization: refers to magnetization energy that does not reach 95% of the saturated magnetization energy. This type of magnetization is reversible and the residual magnetism gradually decreases with time and changes in the magnetic field.2. Saturation magnetization: refers to the energy required for magnetization energy to reach the turning point of magnetization characteristics, generally requiring 1.5 or 2 times the intrinsic coercivity (or remanence), and there will be no demagnetization phenomenon at this time.3. Oversaturation magnetization: At this point, the magnetization energy reaches more than three times the intrinsic coercivity, and the surface magnetism only undergoes slight changes with changes in the magnetic field. This method is adopted for environments with high magnetic energy requirements.A magnetizer is a tool used to magnetize magnetic materials or devices by applying a magnetic field to neodymium iron boron products that need to be magnetized. I

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2024-01
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