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The permanent magnet motor uses permanent magnets to generate the magnetic field of the motor. It does not require excitation coils or excitation currents. It has high efficiency and simple structure. It is a very good energy-saving motor. With the development of high-energy permanent magnets, permanent magnet motors have been widely used. This article first introduced the structure and working principle of the permanent magnet motor, followed by the advantages of the permanent magnet motor,...
Soft ferrite materials are important functional materials for electronic information and the home appliance industry. After entering the 21st century, with the continuous advancement of technology, the demand for soft ferrite materials will continue to increase, and performance requirements will continue to increase. The development of China's soft ferrite industry is very rapid and the market prospect is broad. Magnetic materials play an important role in modern industry and science and...
Magnetic beads manufacturer talk about magnetic beads manufacturer analysis of the preparation of magnets. Its characteristics are: 1. The hard magnetic compound is one of R↓[2]T↓[17], R↓[2]T↓[14]M, wherein R is at least one element of a rare earth element and lanthanum, or a rare earth element and yttrium. A combination of elements, or a mixture of rare earth and lanthanum elements, T is a combination of at least one transition metal element or a transition metal element, and M is at least one...
The use of permanent magnetic products, we must first understand its use, working environment, operating temperature and other information in order to decide what kind of permanent magnet materials. Performance classification of permanent magnetic materials 1. Isotropic: also known as the same sex, isotropic. Magnetic domains are randomly arranged (magnetodomains can be thought of as magnetic molecules, which have directionality of South and North poles) and are not oriented in a particular...
At present, rare earth permanent magnet neodymium iron boron (Nd-Fe-B) has been widely used in various aspects of life, such as maglev trains, electric vehicles, wind power, sound and so on. However, the coercivity of sintered NdFeB products is only 20-30% of the theoretical value (Stoner-Walfart limit) (commonly known as Brownian paradox), which severely limits the application of NdFeB. According to the existing theory, the coercive force of sintered NdFeB is mainly determined by the...
The permanent magnet motor is a technology and equipment successfully developed by Germany in the 1980s. Since the world’s first permanent magnet motor developed in Germany, China has started related research work. After 30 years of unremitting efforts, we finally see the dawn of victory. On October 23, the official WeChat platform of China Shipbuilding Industry Corporation issued the news “China's first permanent-vehicle permanent magnet propulsion electric locomotive was successful, with...
Permanent magnet synchronous motors (English name permanent magnet synchronous motor, referred PMSM): Summary: part of the permanent magnet synchronous motor: stator and permanent magnet rotor position sensors, electronic commutation switch. In order to achieve synchronous generator of energy conversion, the need to have a DC magnetic field generated by the magnetic field of the DC current, known as the excitation current of the generator. According to the excitation current supply mode, all...
Internal grinder relative to lathes, milling machines, etc. using CNC system later, because of its special requirements of CNC system. In recent decades, with CNC technology, continuous grinding wheel dressing, automatic compensation, automatic exchange wheel, multi-table, automatic transmission and clamping workpieces and other operating functions to be achieved, CNC technology in the surface grinder and internal grinding gradually universal . Internal grinder use the program 1. Check the oil...
The use of permanent magnetic products, we must first understand its use, working environment, operating temperature and other information in order to decide what kind of permanent magnet materials. Permanent magnetic material performance classification 1. Isotropic: Also known as the same sex, isotropic. Magnetic domains are randomly arranged (magnetodomains can be thought of as magnetic molecules, which have directionality of South and North poles) and are not oriented in a particular...
Since the 1980s, with the rapid development of supporting technologies such as modern motor technology, modern power electronics, microelectronics, control technology, and computer technology, the development of AC servo control technology has greatly progressed, which has previously plagued The AC servo system has made breakthroughs in the problems of complex motor control and poor speed control performance. The performance of the AC servo system has been gradually improved and the price has...
Russian experts have found through experiments that the installation of a certain number of permanent magnets inside and outside the aquarium can greatly accelerate the growth of the fish. Experts concluded after research that this is because the main components of air, nitrogen and oxygen, have different magnetic fields. Nitrogen is a diamagnetic material that is magnetically repulsed away from the magnetic field. Oxygen is a paramagnetic material that accumulates in places where magnetic...
With the continuous development of automotive electronic control technology, the number of automotive electronic equipment has increased greatly, the working frequency has gradually increased, and the power has gradually increased, making the working environment of the automobile full of electromagnetic waves, causing the electromagnetic interference problem to become increasingly prominent, and affecting the normality of electronic equipment. Work, but damage the corresponding electrical...
Acoustic field: the speaker, receiver, microphone, alarm, stage audio, car audio. Electronic appliances: permanent magnetic actuator vacuum circuit breakers, magnetic relays, meter, water meter, sound meter, dry reed pipe, sensors. Motor areas: VCM, CDDVD-ROM, generators, motors, servo motors, micro-motors, motors, vibration motors. Machinery and equipment: magnetic separation, magnetic separation machine, magnetic crane, magnetic machinery. Healthcare: MRI scanners, medical equipment, magnetic...
According to foreign media reports, recently, Michael Zarnstorff of the Max Planck Plasma Physics Research Center in New Jersey is helping his son complete a scientific exhibition project (he wants to build an orbital gun) At that time, realized that the neodymium boron magnet is now powerful enough to replace the superconducting coil. The concept design of the Zalsdorf team combines a simple toroidal superconducting coil and a flat magnet attached to the outside of the plasma vacuum container....
【China Aluminum Industry Net】Rare-earth permanent magnet material is an alloy composed of a rare earth metal and a transition metal (such as cobalt, iron, etc.), which is pressed and sintered by a powder metallurgy method, and is obtained by magnetizing a magnetic field. Magnetic material. Rare-earth permanent magnets consist of SmCo permanent magnets and NdFeB permanent magnets, in which the magnetic energy product of SmCo magnets is between 15-30 MGOe, and the magnetic energy product of...
Electromagnetic Interference Suppression Ferrite magnetic rings, magnetic beads, etc. are favored by designers because of their ease of use and low cost. Its main advantages are as follows: 1) It is very convenient to use and can be directly put on the cable that needs filtering. 2) Unlike other filtering methods that require grounding, there are no special requirements for structural design or circuit board design. 3) When used as a common-mode choke coil, it will not cause signal distortion,...
1. What material, performance? 2. Dimensions and Tolerances? 3. Do you want to magnetize? How do you want to magnetize, axial? Radial? 4. The maximum temperature of the magnet working environment? 5. Order quantity? 6. Surface treatment? Galvanized, nickel plated? 7. If you need special treatment, please inform. Anisotropic Ferrite Magnet Rotor, Anisotropic Ferrite Magnets,Isotropic Ferrite Magnets,Cooler Water Pump Magnet
How Brushless Motors Work Brushless DC motor operating principle diagram, the winding is a three-phase star connection method, 120 degree uniform, three-phase half-bridge drive mode, the rotor is a pair of poles. In the illustrated position, the pole center line of the magnetic steel is aligned with the A-phase winding. At this time, the control circuit makes the S1 switch tube turn on and off according to the rotor position detection signal, and the B-phase winding is energized, under the...
How to do magnetic isolation? Yubang believes that only the materials that can be adsorbed on the magnet can play the role of blocking the magnetic field, and the thicker the material, the better the magnetic isolation effect. What is the strongest magnet? At present, the highest performance magnet is rare earth magnet, and in the rare earth magnet, neodymium iron boron is the most powerful magnet. But in the environment above 200 degrees Celsius, Samarium Cobalt is the most powerful magnet....
The emergence and application of permanent magnet materials has a long history. Our Warring States Period (475 BC to 221 BC) people use natural magnetic iron ore mine polished into a desired shape to guide. In the past 100 years, with the rapid development of science and technology, permanent magnet materials have been continuously improved, and the emergence of new permanent magnet materials has promoted the improvement and development of permanent magnet devices. The demand for high-tech and...
When the core is inserted inside the energized solenoid, the core is magnetized by the magnetic field of the energized solenoid. The magnetized core also becomes a magnet, so that the magnetic properties of the solenoid are greatly enhanced by the superimposition of two magnetic fields. In order to make the electromagnet more magnetic, the iron core is usually made into a hoof shape. But pay attention to the winding of the coils on the hoof-shaped iron core, which is clockwise and the other...