Rare earth is known as the "vitamin" of modern industry, and it has important strategic value in intelligent manufacturing, new energy industry, military field, aerospace, medical treatment, and all emerging industries involving the future.
The third generation of rare earth permanent NdFeB magnets is the strongest permanent magnet in contemporary magnets, known as the "permanent magnet king". NdFeB magnets is one of the strongest magnetic materials found in the world, and its magnetic properties are 10 times higher than the ferrite widely used before, and nearly 1 times higher than the first and second generation of rare earth magnets (samarium cobalt permanent magnet). It uses "iron" to replace "cobalt" as a raw material, reducing the dependence on scarce strategic materials, and the cost has been greatly reduced, making the wide application of rare earth permanent magnets possible. NdFeB magnets is the ideal material for manufacturing high-efficiency, miniaturized and lightweight magnetic functional devices, which will have a revolutionary impact on many applications.
Due to the advantages of China's rare earth raw material resources, China has become the world's largest supplier of NdFeB magnetic materials, accounting for about 85% of the global output, so let's explore the application field of NdFeB magnets products.
Applications of NdFeB magnets
1.Orthodox Car
The application of high-performance NdFeB magnets in traditional automobiles is mainly concentrated in the field of EPS and micromotors. EPS electronic power steering can provide the power effect of the motor at different speeds, ensuring that the car is light and flexible when steering at low speed, and stable and reliable when steering at high speed. EPS has high requirements on the performance, weight and volume of permanent magnet motors, because the permanent magnet material in EPS is mainly high-performance NdFeB magnets magnets, mainly sintered NdFeB magnets . In addition to the starter that starts the engine on the car, the rest of the motors distributed in various places on the car are micromotors. NdFeB magnets permanent magnet material has excellent performance, used to manufacture motor has the advantages of small size, light weight, high efficiency and energy saving, the previous automotive micromotor only as a wiper, windshield scrubber, electric oil pump, automatic antenna and other components assembly power source, the number is relatively small. Today's cars pursue comfort and automatic maneuvering, and micro-motors have become an indispensable part of modern cars. Skylight motor, seat adjusting motor, seat belt motor, electric antenna motor, baffle cleaning motor, cold fan motor, air conditioner motor, electric water pump, etc. all need to use micromotors. According to automotive industry estimates, each luxury car needs to be equipped with 100 micromotors, at least 60 high-end cars, and at least 20 economic cars.
2.New Energy Automobile
NdFeB magnets permanent magnet material is one of the main functional materials of new energy vehicles. NdFeB magnets material has excellent performance and is used to manufacture motors, which can realize the "NdFeB magnets " of automotive motors. In the automobile, only with the small motor, can reduce the weight of the car, improve safety, reduce exhaust emissions, and improve the overall performance of the car. The application of NdFeB magnets magnetic materials on new energy vehicles is larger, and each hybrid vehicle (HEV) consumes about 1KG more NdFeB magnets than traditional vehicles; In pure electric vehicles (EV), rare earth permanent magnet motors instead of traditional generators use about 2KG NdFeB magnets.
3.Aerospace Field
Rare earth permanent magnet motors are mainly used in various electric systems on aircraft. An electric brake system is a drive system with an electric motor as its brake. Widely used in aircraft flight control systems, environmental control systems, braking systems, fuel and starting systems. Because rare earth permanent magnets have excellent magnetic properties, a strong permanent magnetic field can be established without additional energy after magnetization. The rare earth permanent magnet motor made by replacing the electric field of the traditional motor is not only efficient, but also simple in structure, reliable in operation, small in size and light in weight. It can not only achieve high performance that traditional excitation motors cannot achieve (such as ultra-high efficiency, ultra-high speed, ultra-high response speed), but also can manufacture special motors to meet specific operating requirements.
4.Other areas of transportation (high-speed trains, subways, maglev trains, trams)
In 2015, China's "permanent magnet high-speed rail" trial operation successfully, the use of rare earth permanent magnet synchronous traction system, due to the permanent magnet motor direct excitation drive, with high energy conversion efficiency, stable speed, low noise, small size, light weight, reliability and many other characteristics, so that the original 8-car train, from 6 cars to 4 cars equipped with power. Thus saving the traction system cost of 2 cars, improving the traction efficiency of the train, saving at least 10% of electricity, and reducing the life cycle cost of the train.
After the NdFeB magnets rare earth permanent magnet traction motor is used in subway, the noise of the system is significantly lower than that of the asynchronous motor when running at low speed. The permanent magnet generator uses a new closed ventilated motor design structure, which can effectively ensure that the internal cooling system of the motor is clean and clean, eliminating the problem of filter blockage caused by the exposed coil of the asynchronous traction motor in the past, and making the use safer and more reliable with less maintenance.
5.wind power generation
In the field of wind power, high-performance NdFeB magnets is mainly used in direct drive, semi-drive and high-speed permanent magnet wind turbines, which take the fan impeller to directly drive the generator rotation, characterized by permanent magnet excitation, no excitation winding, and no collector ring and brush on the rotor. Therefore, it has simple structure and reliable operation. The use of high-performance NdFeB magnets reduces the weight of wind turbines and makes them more efficient. At present, the use of NdFeB magnets 1 megawatt unit is about 1 ton, with the rapid growth of the wind power industry, the use of NdFeB magnets in wind turbines will also increase rapidly.
6.consumer electronics
a.mobile phone
High-performance NdFeB magnets is an indispensable high-end accessories in smart phones. The electroacoustic part of the smart phone (micro microphone, micro speaker, Bluetooth headset, hi-fi stereo headset), vibration motor, camera focusing and even sensor applications, wireless charging and other functions need to apply the strong magnetic characteristics of NdFeB magnets.
b.VCM
Voice coil motor (VCM) is a special form of direct drive motor, which can directly convert electrical energy into linear motion mechanical energy. The principle is to put a circle of barrel winding in a uniform air gap magnetic field, and the winding is energized to generate electromagnetic force to drive the load for linear reciprocating motion, and change the strength and polarity of the current, so that the size and direction of the electromagnetic force can be changed.VCM has the advantages of high response, high speed, high acceleration, simple structure, small size, good force characteristics, control, etc. VCM in hard disk drive (HDD) mostly as a disk head to provide movement, is an important core component of HDD.
c.variable frequency air conditioner
Variable frequency air conditioning is the use of micro-control to make the compressor operating frequency can change within a certain range, by changing the frequency of the input voltage to control the speed of the motor, which causes the compressor to change the gas transmission to change the refrigerant circulation flow, so that the cooling capacity or heating capacity of the air conditioner changes to achieve the purpose of adjusting the ambient temperature. Therefore, compared with fixed frequency air conditioning, frequency conversion air conditioning has the advantages of high efficiency, energy saving and environmental protection. Because the magnetism of NdFeB magnets is better than ferrite, its energy saving and environmental protection effect is better, and it is more suitable for being used in the compressor of frequency conversion air conditioner, and each frequency conversion air conditioner uses about 0.2 kg NdFeB magnets material.
d.Artificial intelligence
Artificial intelligence and intelligent manufacturing have received more and more attention, intelligent robots have become a core technology of human reform of the world, and the driving motor is the core component of the robot. Inside the drive system, micro-NdFeB magnets are everywhere. According to the information and data show that the current robot motor permanent magnet servo motor and NdFeB magnets permanent magnet motor is the mainstream, servo motor, controller, sensor and reducer are the core components of robot control system and automation products. The joint movement of the robot is realized by driving the motor, which requires a very large power mass and torque inertia ratio, high starting torque, low inertia and smooth and wide speed regulation range. In particular, the actuator (gripper) at the end of the robot should be as small and light as possible. When fast response is required, the drive motor must also have a large short-term overload capacity; High reliability and stability is a prerequisite for the general application of the drive motor in industrial robots, so the rare earth permanent magnet motor is the most suitable.
7. medical industry
In medical terms, the emergence of NdFeB magnets has promoted the development and miniaturization of magnetic resonance imaging MRI. Permanent magnet RMI-CT magnetic resonance imaging equipment used to use ferrite permanent magnet, the weight of the magnet is up to 50 tons, the use of NdFeB magnets permanent magnet material, each nuclear magnetic resonance imager only needs 0.5 tons to 3 tons of permanent magnet, but the magnetic field strength can be doubled, greatly improving the image clarity, and NdFeB magnets permanent magnet type equipment has the least area, the least flux leakage. The lowest operating cost and other advantages.
NdFeB magnets is becoming the core support of many advanced industries with its powerful magnetic force and wide applicability. We understand its importance, so we do our best to build an advanced production system. Hangzhou Magnet Power Technology Co., Ltd. has successfully achieved batch and stable production of NdFeB magnets, whether it is N56 series, 50SH, or 45UH, 38AH series, we can provide customers with continuous and reliable supply. Our production base adopts advanced automation equipment and intelligent management system to ensure the precision and efficiency of the production process. Strict quality testing system, do not miss any detail, to ensure that each piece of NdFeB magnets meet the highest standards, so that we can meet the diverse needs of different customers. Whether it is a large order or a customized demand, we can respond quickly and deliver on time.
Post time: Aug-29-2024
