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When a patient undergoes an operation or salvage through an artificial heart pump, the replacement of the heart pump due to wear of the pump bearings will result in life-threatening injuries to the patient. A permanent magnet bearing that can replace mechanical bearings can solve this problem. China has successfully developed the world's first permanent magnet suspension rotary machine. Experts said that "this is a new mechanical revolution" and its significance lies in a major theoretical...
How to achieve magnetic separation? We believes that only materials that can be adsorbed on the magnet can function to block the magnetic field, and the thicker the material, the better the magnetic separation effect. What is the strongest magnet? At present, the highest performance magnet is a rare earth magnet, and in the rare earth magnet, neodymium iron boron is the most powerful magnet. However, in the environment above 200 degrees Celsius, samarium cobalt is the most powerful magnet....
The door magnetic system, as the first line of defense of the smart home security part, can generally be divided into three parts: door magnetic switch, door magnetic sensor (detector) and door magnetic alarm. Some access control systems are based on a smart bus and the same system platform, so that smart home smart terminals can be easily connected to the video doorbell system gateway and management center to implement guest talk, message, photo and access control functions, and become home...
The permanent magnet synchronous motor adopts high-energy permanent magnets, which eliminates the influence of the mechanical transmission chain of rotary servo motor from rotary motion to linear motion. It has high thrust strength, low loss, small electrical time constant and fast response, and becomes a high-precision, micro- One of the best actuators in the feed servo system. At present, due to the continuous improvement of the performance of modern permanent magnet materials, it is...
If you are looking for a way to connect your partner even if separated, you may be interested in a new device called Magnet that provides a new smart jewelry wearable device that connects to your smartphone to communicate via Bluetooth . Magnets are created to enable users to communicate their emotions and tell the spouse something special and only you two can understand. Magnets establish a connection between two people, providing a secure connection, sharing intimacy and importance. The...
The first-generation permanent magnet governor is composed of three parts, a cage conductor rotor, a disc-shaped permanent magnet rotor and a regulator. The disc-shaped permanent magnet rotors are in the cage-shaped conductor rotors, separated by air gaps, and rotate independently with their respective rotating shafts; the regulators regulate the air gap between the disc-shaped permanent magnet rotors and the disc-shaped conductors to change the cage shape. The distance between the conductor...
Electric pump is to provide hydraulic fluid pressure of a hydraulic components, is a pump. Its function is to convert the mechanical energy of power machines (such as electric motors and internal combustion engines) into liquid pressure energy. The output flow can be adjusted according to the needs called variable pump, the flow can not be adjusted called quantitative pump. Hydraulic system commonly used pump gear pump, vane pump and plunger pump 3 kinds. Gear pump: smaller, simple structure,...
Because PMSM has the characteristics of high power density, high efficiency, and high power factor, it has become more and more widely used in industrial, civilian, military, and other fields. The DTC abandons the decoupling control concept in vector control, removes the PWM control and current feedback links, and uses a specific stator flux orientation and space vector concept to observe the stator flux and current directly to observe the motor flux linkage in the stator coordinate system. The...
Self-priming pump installation 1, the direct drive pump and the motor should pay attention to the coaxiality of the pump shaft and the motor output; pump installation accuracy or not on the smooth operation of the pump and have a greater impact on the service life, it must be carefully installed And correction. 2, the pump coupling must be tightened with the mother, and lock the nut, to prevent the mother loose, otherwise easy to cause the impeller to move, resulting in mechanical failure. 3,...
This is indeed shocking. The study found that bacteria grow above the tiny particles of natural magnets. These bacteria are a mixed community that can "swallow" and "breathe" electrons from the metal. In recent years, power generation bacteria has become a hot topic. Scientists have found that some bacteria found on the seabed and river bed all over the world can get electrons from tiny metal particles. By "donating" electrons to bacteria, iron particles become an effective source of energy for...
The application of micro-motors in daily life has become increasingly widespread and has penetrated into all aspects of life, among which the largest amount of miniature permanent-magnet DC motor (PMDC) is used. PMDC has a simple structure, small size, less copper, high efficiency, and is very popular in the automotive industry. Automotive motor application environment is generally harsh, and its actual use is not at room temperature, but at high / low temperature; such as the motor is often...
The permanent magnet synchronous traction system of the new generation high-speed train developed by the CSR Zhuzhou Institute (hereinafter referred to as the Zhuzhou Institute of Technology) has recently passed the ground test evaluation of the National Railway Testing and Test Center. The reporter recently learned from the Zhuzhou Institute that the first high-speed rail equipped with a permanent magnet traction system has already been rolled out of the CSR Qingdao Quartet. It will then enter...
The servo motor can control the speed and position accuracy very accurately, and can convert the voltage signal into torque and speed to drive the control object. A servo motor is an engine that controls the operation of a mechanical component in a servo system, and is an auxiliary motor indirect transmission. At present, the DC motor used in the CNC machine feed drive is mainly a large inertia wide speed permanent magnet DC servo motor. This section will mainly analyze and analyze this motor....
In the absence of an external magnetic field, it can maintain its own magnetic objects for a long time. Permanent magnets can be made of ferromagnetic materials such as iron, nickel, and the like. Its atomic structure is special, and the atom itself has a magnetic moment. The general arrangement of these minerals is disordered, and the magnetic domains do not show magnetic interaction. However, when the external forces, such as magnetic fields, guide the alignment of the molecules, magnetic...
Recently, Hou Yanglong's research group of Peking University Institute of Technology and Brown University have successfully prepared an L10-FePt-based exchange-coupling composite magnet with a core-shell structure. The size of the soft magnetic shell (Co, Ni, Fe2C) can be adjusted. , Related papers were published online in the internationally renowned journal "Applied Chemistry". The adjustment of the coupling effect between the grains is an important idea for designing high-performance...
Magnetic pump magnetic material NdFeB and ferrite difference The magnetic coupling in the fluoroplastic magnetic pump is its main component. Today we will come to know the magnet on the magnetic coupling. The magnet is divided into a weak magnet and a strong magnet. Fluoroplastic magnetic pumps are commonly used in two types. Weak magnets are also called ferrite magnets, and strong magnets are called neodymium iron boron magnets. Ferrite magnets are common black magnets, which are commonly...
In recent years, due to the development needs of national defense, scientific research, electronics and other industries, in particular the demand for high-tech products (such as computers, laser, microwave, etc.), the demand for electronic materials ferrite greatly increased, its performance also raised Higher requirements. At present, high-performance ferrite electronic materials belong to the high-tech products of today's world and have broad development prospects. The domestic development...
Introduction: NdFeB magnets are used to produce blanks from ingredients, to further processed products, and finally to sales. Do you understand these processes? 1, raw material preparation and pretreatment: Process Description: Pretreatment of raw materials such as weighing, crushing, cutting and rust removal. Process equipment: steel cutting machine, drum polishing machine, etc. 2, smelting: Process Description: After pretreatment, raw materials such as yttrium, pure iron, ferroboron, etc. are...
The TDK Group has recently introduced a new EPCOS manganese-zinc (MnZn)-based PC200 ferrite magnetic material with high frequency and low loss characteristics. Developed specifically for power supplies and frequency converters with GaN-based fast switching power semiconductors, the magnetic field is optimized from 700kHz to 4MHz. The maximum transmission power is achieved when the switching frequency is 1.8 MHz to 2 MHz and the operating temperature is 100 °C. The maximum Curie temperature of...
As we all know, magnets can be divided into "permanent magnets" and "non-permanent magnets." Permanent magnets can be natural products, also known as natural magnets, or they can be made by hand. Non-permanent magnets only appear magnetic under certain conditions. However, in practical applications, magnets can be generally classified into five categories: NdFeB permanent magnets, permanent magnet ferrites, samarium cobalt magnets, AlNiCo magnets, and rubber magnets. So, what are the uses of...
Magnetics has introduced new high permeability ferrite M materials for signal, choke and filter applications such as common mode chokes, EMI suppression filters, signal processing and wideband transformers. The M material is a new high permeability (15,000μ) material that provides good impedance performance over the switching frequency range. High permeability ferrite materials have excellent loss factors, frequency response, temperature performance and product consistency. Initial permeability...
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...
[IT168 News] Yesterday we reported that Meizu's three new machines appeared in the National 3C Certification Center, one of which was suspected to be Charm Blue Note 5. Subsequently, a model suspected of Charm Blue Note5 appeared on the well-known running sub-site Geekbench. At the same time, sub-software security Bunny also revealed the hardware configuration and running points of Charm Blue Note 5 on Weibo. If you publish it, you should be able to catch up with the double 12. Geekbench...
The reporter learned from the 192nd Research Institute of China Shipbuilding Industry that the first set of permanent-vehicle permanent magnet propulsion motor trains developed by the Institute was successful, marking the first set of permanent magnet propulsion motors with complete independent intellectual property rights in China to be applied to the real-life boats. An important step has been taken, which means that China's ship propulsion technology has reached the world's advanced level....