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

The 550 dc motor has a body length of 66mm compared to the 540 motor's body length of 50mm. this shows that the 550 motor is visually quite a bit longer than the 540 motor.

Although both have the same diameter of 36mm, the 550 motor has a core diameter of 5mm, while the 540 motor has a core diameter of 3.175mm, showing that the 550 motor has also increased in core diameter.

The basic difference is that the KV value is different, that is, the speed is different under the same voltage, the higher the KV value, the higher the speed, but the torque is small. According to the different motors and batteries and models with different sizes of paddles.

550 DC motor. It is usually used for the power part in small machines such as models and toy cars, and has a low power output, usually no more than a few tens of watts.The 550 motor has good acceleration, but is not very fast. It has a longer armature compared to other sizes of motors, so it can generate more heat.

The 540 dc motor is a strong magnetic carbon brush motor with 24V 10,000 rpm and a power of about 50-60W. It is mainly used in making equipment such as small electric drills or electric grinders

There are two types of motors, brushed and brushless. Brushed motors are motors that transfer power to the armature by contacting the brushes inside the motor. Brushless motors, on the other hand, control the steering and speed of the rotor through an external circuit. Due to the complex structure and high manufacturing cost of brushless motors, the price is also much higher compared to brushed motors.

The 775 and 795 motors are a common type of DC brushless motor, and their numerical designations indicate the following:

The first number (7) indicates the diameter of the motor in 1/10 inch. Thus, the 775 and 795 motors have diameters of 7.75 inches and 7.95 inches, respectively.

The second number (7 or 9) indicates the length of the motor in 1/100th of an inch. Therefore, the lengths of the 775 and 795 motors are 7.5 inches and 9.5 inches, respectively.

The third number (5) indicates the motor series, with different series representing different characteristics and uses.

The fourth number indicates the version number of the motor. Different versions of the motor may have different properties and parameters.

The main differences between them are size and performance.

Size: the 775 dc motor is 7.75 inches in diameter and 7.5 inches long, while the 795 motor is 7.95 inches in diameter and 9.5 inches long. Therefore, the 795 motor is longer than the 775 motor, but has a larger diameter.

PERFORMANCE: Because the 795 dc motor is longer than the 775 motor, it typically has higher torque and power. Also, the 795 motor usually requires a higher voltage to work properly, but it can provide higher RPM and output power at the same voltage.

It is important to note that 775 and 795 motors from different manufacturers may have different versions and parameters, so you need to check the relevant specifications and manuals carefully when choosing a motor to ensure that the motor you choose meets the performance requirements needed.

Asynchronous motors and synchronous motors are two common types of rotating motors, which differ in their operating principles and performance characteristics.

1. Operating Principle: Asynchronous motors rotate based on the relative motion between the rotating magnetic field generated in the windings and the magnetic field; synchronous motors, on the other hand, need to synchronise the magnetic field generated in the windings with the external magnetic field.

2. Starting method: asynchronous motors usually use starting capacitors, starting resistors, motor exciters and other auxiliary equipment to start; while synchronous motors generally need to be externally provided with starting torque.

3. speed control: asynchronous motor speed is generally controlled by the voltage change, can be achieved by frequency conversion and other ways; synchronous motor speed is limited by the frequency of the power supply, usually need to use a mechanical speed changer to achieve speed control.

4. power factor: asynchronous motor in the load change, its power factor is usually variable, in the light load or no load situation power factor is low; synchronous motor in part of the load power factor is high, and can be adjusted through the reactive power compensation power factor.

5. Overload characteristics: asynchronous motors have better overload capacity, can withstand a large load impact in a short period of time; synchronous motors have poorer overload capacity, and are prone to stall for overload conditions.Because synchronous motors need to be synchronised with an external power source, they usually require a more complex control system for implementation; whereas asynchronous motors have a relatively simple control system because they do not need to be synchronised with an external source.

Magnetic hook is a magnetic hanging tool, which is a combination of a pot magnet base and a hook attachment. The pot magnet base, which can maximise the lifting magnetic force, and the internal magnets are mostly neodymium iron boron powerful magnets. Magnetic hooks can be hung on appliances, doors, windows, cabinets, ceilings, walls or any other local steel surfaces to provide a convenient hanging point.

Magnetic hooks can be used for home, commercial, industrial and technical applications. Magnetic hooks can be used to hang keys, pictures, indoor tools (such as scissors and knives), cleaning equipment (such as brooms and mops), and clothes hanging on hangers in the home. Magnetic hooks can also be used to hang lights, wires, cables, tools, banners, signs and more.

Magnetic hooks are easy to work with and can be tidied up without drilling, screwing or gluing. Will not damage appliances, doors, windows, cabinets, ceilings, walls and other surfaces. Simply attach the magnetic hook to a steel surface and hang things. Easily remove them when not in use.

Magnetic hooks commonly have open hooks, closed hooks, hanging hooks and so on. Specifically according to the needs of the choice.

How to choose the magnetic hook?

1.According to the weight of the hanging object, choose the appropriate tension.

2. According to the size of the adsorption surface area, choose the right size.

3. According to the choice of product use, choose the right type of magnetic hook.

NdFeB magnet is a kind of rare earth permanent magnetic material, due to its wide application in modern technology, recycling and reuse of NdFeB magnet becomes more and more important. Below are some common methods of recycling NdFeB magnets:

1. Separation and recycling: Neodymium magnets are usually used in electronic equipment, automotive parts and other products. During the recycling process, NdFeB magnets can be separated from waste products by physical or chemical methods. This may involve steps such as dismantling equipment, crushing and magnetic separation.

2. Smelting and Extraction: Once the NdFeB magnets have been separated, the rare earth metals in them can be recovered through a smelting and extraction process. This usually involves heating the discarded magnet material to a high temperature and then using chemical methods to extract the rare earth metals from other materials.

3. Reuse: Recycled NdFeB magnets can be used in the production of new magnet products, thus reusing resources. This helps to reduce new mining of rare earth metals and reduce environmental impact.

It should be noted that the recycling process of NdFeB magnets may require specialised equipment and technology, as well as compliance with relevant environmental regulations. Therefore, the recycling of NdFeB magnets should preferably be carried out by a professional recycling and reuse organisation.

With the continuous progress of science and technology, magnetic materials are more and more widely used in various fields. And in the field of electric motors, NdFeB magnets as a high-performance rare earth permanent magnet material, has an important role. This article will introduce the role and application of motor NdFeB magnets in detail.

Basic Characteristics of NdFeB Magnet

NdFeB magnet is a kind of rare earth permanent magnetic material composed of neodymium, iron, boron and other elements. It has high magnetic energy product, high coercivity, high remanence and other characteristics, these characteristics make NdFeB magnet in the motor can play an excellent performance.

The role of motor NdFeB magnet

1. Improve the efficiency of the motor

The application of motor NdFeB magnets can improve the efficiency of the motor. This is because in the operation of the motor, the strength of the magnetic field will have an impact on the efficiency of the motor. NdFeB magnets have high magnetic energy product and high coercivity, which can make the magnetic field strength of the motor has been significantly improved, so that the efficiency of the motor is also improved.

2. Enhanced motor torque

The application of motor NdFeB magnets can also enhance the torque of the motor. This is because in the operation of the motor, the magnetic field strength and the size of the current will have an impact on the torque of the motor. The application of NdFeB magnets can make the magnetic field strength of the motor has been improved, but also can optimise the size of the current to improve the torque of the motor.

3. Realise the high efficiency and energy saving of the motor

The application of motor NdFeB magnets can achieve high energy efficiency of the motor. This is because in the operation of the motor, if the size and timing of the current can be effectively controlled, it can make the efficiency of the motor to be further improved, but also reduce the waste of energy. And the application of NdFeB magnets can achieve precise control of the motor, which can make the efficiency of the motor be further improved.