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Strong Neodymium magnets are a common magnetic material, usually made of metal alloys such as iron, nickel and cobalt. They have a wide range of applications in modern industry and daily life, such as electric motors, generators, magnetic brakes, magnetic separators and so on. For the size of the remanent magnet of powerful magnets, whether bigger is better depends on the specific application scenario and requirements.

First, let's understand what residual magnetism is. Residual magnetism is the magnetism that remains in a material after a magnetic field has been applied. In the case of a powerful Neodymium magnet, a higher remanent magnetism means that it is able to maintain a stronger magnetism after a magnetic field has been applied, which can be beneficial in some cases.

In some applications, such as electric motors and generators, the remanent magnetism provides a continuous magnetic field that enables the conversion and transmission of electrical energy. Therefore, in these applications, the greater the remanent magnetism of a powerful magnet, the better, which can improve the efficiency and performance of the equipment.

On the other hand, in applications where controlled magnetism is required, such as magnetic separators and magnetic brakes, excessive remanent magnetism may result in unwanted magnetic disturbances or uncontrollable magnetic forces that can affect the proper operation of the equipment. Therefore, in these applications, the remanent magnetism may need to be precisely controlled to ensure equipment stability and controllability.

In addition, the amount of remanent magnetism in a powerful magnet can affect its long-term stability and life. Excessive remanent magnetism can lead to fatigue and demagnetization of the magnetic material, which can shorten the life of the equipment. Therefore, when designing and selecting powerful magnets, it is necessary to consider the size of the remanent magnetization, the requirements of the application, and the long-term stability of the material.

The application of micro motors in automated production lines is wide and deep, covering almost every aspect of the production line.Commonly used are brush DC motors, brushless DC motors, miniature hollow cup motors, etc.

Conveyor Belt Drive

In automated production lines, conveyor belts are the key equipment for material transportation. Micro-motor as the driving device of the conveyor belt can accurately control the running speed and position of the conveyor belt to ensure that the materials can be accurately and efficiently transferred to the designated position.

Industrial Robot

Industrial robots are an important part of automated production lines, and they are capable of accomplishing a variety of complex operational tasks. As the power source of industrial robots, micro-motors provide stable and reliable power support for the movement of robots. By precisely controlling the operation of micro motors, industrial robots are able to realize high-precision operations and improve productivity and product quality.

Packaging Machinery

Micro motors also play an important role in packaging. Micro-motors in packaging machinery can precisely control the cutting and sealing of packaging materials to ensure the accuracy and efficiency of the packaging process. At the same time, the micro-motor can also realize the rapid adjustment and switching of packaging machinery, to adapt to the packaging needs of different products.

With the continuous development of science and technology, micro-motor will play a more important role in the automated production line. In the future, micro-motors will move towards a more efficient, more intelligent and more environmentally friendly direction. At the same time, with the popularization and application of intelligent manufacturing, industrial Internet and other technologies, micro-motors will be deeply integrated with these advanced technologies to jointly promote the upgrading and development of automated production lines.

The life of a magnet is affected by a number of factors, including the type of magnet, the environment in which it is used, how it is maintained, and the conditions in which it is stored. This article will detail how these factors affect magnet life and provide some suggestions for extending magnet life.

Magnets can be roughly divided into two categories: permanent magnets and electromagnets. Permanent magnets, such as neodymium-iron-boron (NdFeB) magnets, are by far the most commonly used and are stable and strong. Electromagnets, on the other hand, require a constant supply of electric current to maintain a magnetic field.

Environment of use

The environment in which a magnet is used has a direct impact on its life. Temperature, humidity, chemicals and mechanical vibration in the environment can all negatively affect the magnet's magnetic properties.

Temperature: High temperatures are one of the main factors that weaken the magnet's magnetic properties. Generally speaking, the maximum operating temperature of permanent magnets ranges from 80°C to 200°C. Beyond this range, the magnetism will be permanently weakened.

Humidity: Increased humidity can accelerate the corrosion process of magnets, especially for those with inadequate surface protection.

Chemicals: Chemical corrosion is also capable of damaging the structure and magnetic properties of magnets, especially in acidic or alkaline environments.

Magnets can have a very long life, but the exact life depends on their type, the environment in which they are used, and how well they are maintained. By understanding these factors and taking proper protective measures, the life of a magnet can be effectively extended. For those applications where magnetism needs to be maintained over a long period of time, it is important to select high quality magnets and maintain them properly.

Magnetization direction is the first step in obtaining magnetism in sintered NdFeB magnets, which represents the position of the north and south poles in a neodymium magnet.

Neodymium powerful magnets come in a variety of shapes and sizes, and the different shapes each have their own corresponding magnetization direction to choose from. The North Pole is shown in red and the South Pole is shown in gray in all the illustrations in the article.Becoming familiar with the magnet's direction of magnetization will help you determine which direction of magnetization is best for your product and which way it should be oriented to work most efficiently.

I. Round and cylindrical magnet magnetizing direction

Circular magnets can be either axially magnetized or radially magnetized. Axially magnetized circular magnets have a north pole and a south pole in a large plane. Radially magnetized circular magnets have a north pole and a south pole on the side of a circle.

2.Square Magnets

Square magnet size marking: length*width*height. The last position of the general size marking is the magnetizing surface, for example, F20*15*10MM, the magnetizing square of this magnet is 10mm thickness magnetization. If it is F20*10*15MM, then the magnetization interview is in 15mm this face magnetization.

3. Ring magnets

Ring magnets can be axially magnetized or radially magnetized. Axially magnetized ring magnets have a north pole and a south pole on a flat surface. Radially magnetized ring magnets have north and south poles on rounded sides. It's actually similar to a circular magnet.

Model number cross-reference charts for NdFeB magnets are usually provided by manufacturers or sellers to identify magnets with different specifications and properties. These model numbers usually consist of letters and numbers that represent the magnetic material composition, magnetic properties, and other information. Below is an example of a common NdFeB magnet model number cross-reference.

1.N35-N52: This series of models represents the magnetic performance level of NdFeB magnets, from N35 to N52, the magnetic performance gradually increases. For example, N52 neodymium magnets has the highest magnetic properties and the strongest suction.

2. N, M, H, SH, UH, EH, AH: These letters represent the magnetic temperature coefficient and the maximum use temperature of different grades. For example, N represents the standard level, which is suitable for use in general environments; M, H, SH, UH, EH, AH represent different temperature levels, which are suitable for use in high-temperature environments.

3. 35M, 38H, 42SH: These models are usually expressed as a combination of magnetic performance class and temperature class, e.g. 35M represents N35 class magnets and are suitable for use in medium temperatures (100 degrees Celsius).

Br stands for remanent magnetism, remanent magnetism is not surface magnetism, although both are in gauss units, two pieces of the same size and shape of the magnet, the higher the remanent magnetism, the greater the surface magnetism, the stronger the magnetic properties. But two different shapes of magnets, the remanent magnetization may be the same, the remanent magnetization is related to the raw materials. The remanent magnetization is related to the raw material, while the apparent magnetization is related to the size, performance, shape and so on.(BH)max represents the maximum magnetic energy product, the larger the maximum magnetic energy product, the stronger the magnetism.Tw represents the maximum operating temperature, this parameter should be judged according to the magnet L/D ratio.

NdFeB countersunk hole magnets are rare earth permanent magnets with countersunk holes. Countersunk holes, many people are unfamiliar with this, in fact, you can understand the screw holes, the main purpose of the countersunk holes is to be used with the screws, to play a fixed about, and the size of the countersunk holes is best to be the same as the specifications of the screws. Usually, countersunk holes are parallel to the direction of magnetization.

Countersunk head holes provide a convenient way to securely fasten magnets to almost any flat surface using matching screws. As a result, they are convenient organizers with unlimited uses in work and life, such as magnetic door latches, magnetic tool holders, cabinet closures, magnetic lights, and many more mounting applications. Using the world's strongest and extremely cost-effective permanent magnets, NdFeB countersunk hole magnets are ideally suited and highly recommended for many applications in the home and industry, including door latches, tool holders, wall mounted artwork, and more! N35, N42, N48, and N52 are common grades of NdFeB magnets.

Countersunk pot magnets are countersunk round or square magnets encased in a steel shell. They are an upgraded version of a strong countersunk head magnet, characterized by super strong suction, very durable and super easy to install. What does neodymium iron boron countersunk hole powerful magnet mean?Countersunk pot magnets are countersunk round or square magnets encased in a steel shell. They are an upgraded version of a strong countersunk magnet, characterized by super strong suction, very durable and super easy to install.

Permanent magnet synchronous motor is a new type of motor. Permanent magnet synchronous motor has the advantages of simple structure, small size, high efficiency, energy saving and environmental protection, high power factor and low failure rate.

Permanent magnet synchronous motor uses permanent magnet instead of excitation winding for excitation. When the three-phase stator windings (each with an electrical angle difference of 120°) of a permanent magnet motor are supplied with a three-phase alternating current of frequency F, a rotating magnetic field moving at a synchronous speed is generated. In steady state, the main pole magnetic field rotates in synchronization with the rotating magnetic field and therefore the rotor speed is synchronized. The rotating magnetic field of the stator and the main pole magnetic field established by the permanent magnets remain relatively stationary, and they interact to produce an electromagnetic torque that drives the motor to rotate and perform energy conversion.

Compared with AC asynchronous motors, permanent magnet motors have the following advantages.

The external characteristic efficiency curve of a permanent magnet synchronous motor has a much higher efficiency value at light loads compared to an asynchronous motor, which is the biggest advantage of a permanent magnet synchronous motor over an asynchronous motor in terms of energy savings. Usually, when a motor drives a load, it rarely runs at full power. This is because:On the one hand, when the user selects the motor, the power of the motor is usually determined according to the extreme working conditions of the load, and there are few chances for extreme working conditions to occur. At the same time, in order to prevent the motor burned in asynchronous conditions, the user will also give the motor power to leave a margin; on the other hand, in the design of the motor, in order to ensure the reliability of the motor, the designer is usually in the user's requirements on the basis of the power to leave a certain amount of power margins, which leads to the actual operation of more than 90% of the motor working in the rated power of 70% or less, especially when driving a fan or a water pump. As a result, motors usually operate in the light load zone. For induction motors, the efficiency is very low under light load, while permanent magnet synchronous motors can still maintain high efficiency under light load.

I. Linear electric actuator

Linear electric actuator is the most widely used type of electric actuator at present, which is characterized by simple structure, convenient operation, high precision, high torque, and is suitable for most of the occasions that require linear rotation. Among them, the material of linear rod is mostly stainless steel, which can improve the friction coefficient.

Scope of application: linear electric actuators are suitable for medical equipment, electric beds, industrial automation equipment and other fields.

Application scenarios: electric power assisted device, automatic nurse station, medical workstation, human-electric workstation and so on.

2.Angle type electric actuator

Angle type electric actuator is mainly in the linear electric actuator based on the addition of a rotary axis, can realize the dual function of linear and rotary motion. Therefore, in some occasions where both linear and rotary movements are required, angle type electric actuator is very suitable.

Scope of application: Angle type electric actuators are suitable for industrial equipment, medical equipment, automation equipment and other fields.

Application Scenario: Electric nursing bed, adjustable microcomputer lifting table, medical surgical bed, electric wheelchair.

3.Heavy duty electric actuator

Heavy-duty electric actuator is generally used in heavy load occasions, its structure is compact, strong load capacity, usually used in a variety of need for limited angle expansion and contraction adjustment occasions.

Scope of application: Heavy-duty electric actuators are suitable for heavy industrial equipment, aluminum processing, high-pressure processing and other fields.

Application Scenario: High-pressure processing machine tools, glass processing equipment, vertical lifting and lowering attachment devices, stage aerial rods, etc.

4.Miniature electric actuator

Miniature electric actuator has a compact structure and long service life, which is suitable for small equipment that is not applicable to the above three types of occasions. The advantages of miniature electric actuator are high reliability, small size, light weight, low noise, fast speed, long service life and so on.

Scope of application: miniature electric actuator is suitable for miniature home appliances, fitness equipment, security equipment and other fields.

Application scenarios: adjustable desk lamps, smart toilet covers, smart home control devices, fitness instruments, high-definition cameras .

We all know that inside the speaker horn will use magnets, some partners will remove the magnet as a child, you can find the magnet inside is black, this is a ferrite magnet, that is, universal magnet. But with the development of the market, more and more speaker equipment inside the neodymium magnet will be used to replace the traditional speaker magnet.

There are three types of magnetic materials in speaker magnets: alnico magnets, ferrite magnets, and neodymium-iron-boron magnets. Each type of material has a different effect on the tonal characteristics of a loudspeaker.

1. Alnico magnets are the initial magnet material used in loudspeakers to produce classic tones. These speakers sound warmer and sweeter at lower volumes, and many musicians find them more responsive to a player's touch. The disadvantages are low power, narrow frequency range, hard and brittle, and very awkward to work with. In addition, cobalt is a scarce resource and Alnico is relatively expensive. From the comprehensive cost-effective, speaker magnets using Alnico is relatively small.

2. Ferrite magnets are developed as a cheap alternative to Alnico.

Ferrite magnets are generally made into external magnetic horn. The ferrite material has very low magnetic force and has to have a certain volume size to achieve the driving force of the horn. Therefore, it is usually used in louder audio speakers. The advantage of ferrite is that it is cheap and cost-effective; the disadvantages are large size, low power and narrow frequency range.

3. The last material is neodymium iron boron magnet

So what are the advantages and disadvantages of neodymium iron boron speaker magnets?

Advantages: high magnetic performance, small size, the weight will be lighter than other speakers, wide frequency range. Excellent sound quality, good elasticity, good detail, good voice quality and accurate sound field positioning. In terms of price, they are between Alnico and Ferrite magnet speakers. Mostly used in high end speakers.

Disadvantages: disadvantages are sintered moulding, expensive, magnetic, easy to oxidise, slightly less bass, and high temperatures can cause irreversible magnetic degradation