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.

Rubber magnetic material is an emerging magnetic material with many special properties. Rubber magnetic material is compounded by rubber and ferrous powder, so it has the flexibility of rubber and the magnetic property of ferrous powder. It not only has some characteristics of conventional magnetic materials, such as adsorption, magnetic conductivity, etc., but also has some special properties, such as flexibility, sound insulation and wear resistance. The special properties of rubber magnetic material will be described in detail below.

Firstly, rubber magnetic material has excellent flexibility. Due to the elasticity of rubber and the bonding effect of ferrous powder, rubber magnetic materials can be made into various shapes and sizes as needed, such as sheets, strips, tubes and so on. This makes the rubber magnetic material adaptable to different application scenarios, such as it can be affixed to the surface of various objects and used to make magnets of various shapes, such as magnetic sheets, strips, tubes and so on. At the same time, rubber magnetic materials are also able to maintain their magnetic properties under deformation and will not lose their magnetic capability. This makes the rubber magnetic material have high application value.

Secondly, the rubber magnet material has good sound insulation properties. The sound-absorbing property of rubber makes rubber magnetic material able to effectively isolate the spread of sound. In some occasions that need to reduce noise, rubber magnetic material can be used to manufacture soundproof mats, soundproof boards and other products to achieve the isolation of the sound and sound absorption, and play the effect of reducing noise. In addition, the flexible rubber magnetic material can also make use of its magnetic and flexibility advantages, manufacturing sound insulation materials with adsorption, can be used to adsorb the noise source, reduce noise pollution.Rubber magnetic materials have high abrasion resistance. The abrasion resistance of rubber gives rubber magnetic materials a long service life.

In summary, rubber magnetic material has unique special properties. It not only has some characteristics of conventional magnetic materials, such as adsorption, magnetic conductivity, etc., but also has special properties such as flexibility, sound insulation and wear resistance. These properties make rubber magnetic material an ideal magnetic material for a variety of applications, such as home decoration, automotive manufacturing, electronic appliances, medical devices and so on. With the continuous progress of science and technology, it is believed that the special properties of rubber magnetic materials will be better applied and developed.

Cat's eye magnets, also nail art magnets. It is used as an aid for women's nail art. Cat's eye nail glue contains magnet powder, which is adsorbed and gathered under the action of cat's eye magnet. Under the reflection of light, there is a band of light like the pupil of a cat's eye, i.e., there is a thin, narrow and bright reflection on the surface, and the effect is like a cat's eye stone.

What are nail art cat eye magnets made of?

Most of the cat eye magnets are neodymium iron boron magnets, also known as powerful magnets. NdFeB powerful magnets are the most magnetic type of permanent magnet material. Because of the super strong magnetic properties, they can be obtained during use in order to get clean, tight lines.

Can I replace the cat's eye magnets with ordinary magnets?

Ordinary magnets, also known as black ferrite magnets, are weak in magnetism and low in cost, if you use ordinary magnets for cat eye nail art, the shape presented may be irregular and the effect is not as good as strong magnets. So it is recommended to use a strong magnet.

What are the specifications of nail art cat eye magnets?

The common shapes of cat eye magnets are cylindrical, rectangular, round Disc magnet, spherical magnet several kinds.

Such as cylindrical magnet size: D6*15/20/25/30MM, D8*6*15/20/25/30MM and so on.

How much is the customised nail art cat eye magnets?

The cost of customised cat eye magnets is different for different sizes, because NdFeB powerful magnets have different magnetic grades, so you must need to send samples to the supplier during the batch customisation process, according to the actual performance of the samples.

In summary, cat eye magnets use NdFeB powerful magnets.

We just produced a 310 * 310 * 1.0mm of thermal conductivity aluminum nitride ceramic that can be used as a semiconductor 12-inch GaN-on-QST substrate.

GaN-on-QST，QST is the abbreviation of "Qromis substrate technology", which is a substrate for GaN epitaxy, with properties similar to GaN coefficient of thermal expansion.GaN-on-QST that the underlying substrate is aluminum nitride ceramic sheet .

Below is the contrast of GaN/Si and GaN/QST substrate ,QST substrate has more advantages，and the cost is lower than GaN/Si substrate.

In near future,GaN/QST with AlN ceramic underlying substrate will be a new wonderful application.

We just produced high thermal conductivity Aluminum Nitride Ceramic for the large-area cooler.

 The monolithic structue made of Aluminum Nitride(AlN) is airtight after firing, making it perfect for high external pressure applications.

The adavantages of AlN Ceramic for large-area liquid cooler are that the design of monolithic heat-sink provides excellent heat transfer from the ceramic to the cooling water and both cooling connections are on the same side which are inserted with two seal rings.

Therefore, our AlN Ceramic for large area liquid cooler is well suited for applications that require effective cooling of large areas.