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What are the magnetic components in the circuit? The classification and application of magnetic components

Magnetic components are usually composed of windings and magnetic cores. It is a necessary power electronic device for energy storage, energy conversion and electrical isolation. It mainly includes transformers and inductors. In almost all power circuits, magnetic components are inseparable. Magnetic components are one of the most important components of power electronic technology. Classification of magnetic components Magnetic components are mainly divided into transformers and inductors. The main function of the transformer is isolation, voltage conversion, etc., and its core is energy transfer. The main function of inductance is resonance, filtering, etc., and its core is energy storage. Although magnetic components such as electronic transformers and inductors are just small seemingly inconspicuous parts, they play an indispensable role in products such as new energy vehicles, LED power supplies, and photovoltaic inverters. Generally speaking, electronic transformers play the role of voltage transformation, filtering, and energy storage in products, while inductance is to solve EMI problems, electromagnetic compatibility, and so on. Measurement of magnetic components The most common and widely used soft ferrites currently produced are manganese-zinc ferrite (for low frequency) and nickel-zinc ferrite (for high frequency). When the factory leaves the factory, one end of the medium-wave magnetic rod of the manganese-zinc tongue retractor is often painted with black paint, and one end of the nickel-zinc short-wave magnetic rod is painted with red paint. These three methods can be used: 1. Visual inspection method 2. Water milling method 3. Measure with a multimeter. Application of magnetic components The figure below is a typical switching power supply structure, the yellow part is the application of magnetic devices. In addition, the auxiliary power supply also needs a flyback transformer, and there is a PFC inductor in the PFC circuit. Sometimes the output port of the power supply will increase the EMC filter inductor based on EMC requirements. The importance of magnetic components Generally speaking, the volume of the magnetic device accounts for about 20% to 30% of the entire switching power supply, the weight accounts for about 30% to 40%, and the loss accounts for about 20% to 30%. From the figure below, you can intuitively feel the position of magnetic devices in the switching power supply. Magnetic component technology is very important for power converters. In almost all power circuits, magnetic components, inductors or transformers are inseparable. For example, inductance is used at the input and output to filter out the harmonics of the switching waveform; in the resonant converter, the inductor and capacitor are used to generate resonance to obtain sine wave voltage and current; in the snubber circuit, the inductance is used to limit the current change rate of the power device ; In the boost converter, energy storage and transmission; sometimes inductance is used to limit the transient current of the circuit. The transformer is used to electrically isolate the two systems, transform voltage or impedance, or produce phase shift (3-phase delta-Y transformation), store and transfer energy (flyback transformer), and voltage and current detection (voltage and current Transformer). It can be said that magnetic components are one of the most important components of power electronics technology.

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Market development analysis of my country's high-performance NdFeB permanent magnet material industry

 Time of issue: : 2021-06--28

1. Definition and development characteristics of high-performance NdFeB permanent magnet material industry The high-performance NdFeB permanent magnet material is made by the rapid-setting stripping method, and the sum of the intrinsic coercive force Hcj (KOe) and the maximum magnetic energy product (BH) max (MGOe) is greater than 60. The sintered NdFeB permanent magnet material (definition From the "China High-tech Product Catalog 2006"). The performance of high-performance NdFeB permanent magnet materials is mainly characterized by parameters such as coercivity, remanence, maximum energy product, and maximum operating temperature. The definition of each parameter and the unit of measurement are as follows: The development of my country's high-performance NdFeB permanent magnet material industry started relatively late. As a pioneer in the domestic high-performance NdFeB permanent magnet material industry, Yantai Zhenghai Magnetic Materials introduced the then world-class complete set of production equipment from abroad in 2001. Two years of equipment debugging and technical transformation, combined with the oxygen-free production process with independent intellectual property rights, produced my country’s first batch of intrinsic coercivity Hcj (KOe) made by the rapid-setting stripping method in 2003 High performance neodymium iron boron permanent magnet material with the sum of the maximum magnetic energy product (BH) max (MGOe) greater than 60. After 2004, other NdFeB permanent magnet material manufacturers in my country, such as Ningbo Yunsheng, Zhongke Sanhuan, etc., have gradually introduced equipment from abroad to produce high-performance NdFeB permanent magnet materials, making my country's high-performance NdFeB permanent magnets Material output is growing rapidly. In 2006, in order to better support the development of the high-performance NdFeB permanent magnet material industry, my country included high-performance NdFeB permanent magnet materials in the "China High-tech Product Catalog 2006". At present, due to factors such as the distribution of rare earth resources and cost considerations, European and American countries have transferred the production bases of NdFeB permanent magnet materials to my country. Only Germany and Finland still maintain a certain output, and only produce high-performance NdFeB permanent magnet materials. Due to the limitation of the patents of the basic composition of NdFeB, my country's high-performance NdFeB permanent magnet materials cannot enter the international market on a large scale for the time being. The permanent magnet material industry will usher in a period of rapid development.

Survive in the cracks, the price of raw materials has risen in all kinds of magnetic enterprises

 Time of issue: : 2021-06--28

The first quarter is over. Magnetic component manufacturers have been plagued by the price increase of raw materials in the first quarter of this year, dispersing their efforts in market development. The high raw material prices have caused magnetic component manufacturers and their downstream manufacturers to make prices. Game. At the beginning of the Year of the Ox, the price of industrial metals led the raw material market. The entire industrial manufacturing industry was anxious and panicked. It was difficult for anyone to be alone. Each link in the industrial chain was conducted one by one. Internal emergency meetings and business negotiations were all for the purpose of Industry linkage, jointly bear the difficulty of price increase. 　　 When the price of raw materials is rising! 　　 After the festival, with the steadily rising global oil prices, various chemical raw materials have jumped. According to the research media, domestic bulk commodities have continued to rise since June last year. As of the end of February, integrated circuits have soared by more than 100%, paper prices by 50%, zinc alloys by 48%, stainless steel by 45%, copper prices by 38%, aluminum prices by 37%, plastics by 35%, and iron prices by 30% , Glass rose 30%. 　　　　According to incomplete statistics on global plastics, the current price increase in the domestic chemical industry has become an overwhelming trend. The price of some products has increased by more than 10,000 yuan/ton year-on-year, and the price increase has reached more than 153%. DuPont, SK, Nanya Plastics, BASF, Songyuan Group, Changchun Chemical and other engineering plastics companies issued price adjustment announcements at the end of February, with varying price increases. 　　 Dongguan Nanjida Industrial Co., Ltd. specializes in the production of high/low frequency transformer cores (also known as "framework" in the industry), power supply housings, LED lamp housings and other products. These products are injection molded products, and the basic raw material is plastic. Li Xiang, deputy general manager of the company's marketing department, told reporters that the purchase price of raw materials for their products such as skeletons has increased by 20% in recent times. 　　　　 Magnetic cores are the supply chain of magnetic component manufacturers, and the raw material purchase prices of magnetic core manufacturers have also increased to varying degrees. Encore Magnetic Devices Co., Ltd. independently develops, produces and sells sendust, sendust, super sendust, and iron-nickel products. General Manager Wang Liping said that the total purchase price of these products has increased by 30% recently. 　　Compared with the above-mentioned raw materials, rising copper prices have hit the electronics manufacturing industry the most deadly. The data shows that since the copper price rose from a low of US$4,371/ton in March 2020 to a high of US$9,617/ton in February this year, copper prices have risen by more than 100%. Spot copper prices in February hit a new high in the past ten years. 　　 Copper futures are also rising all the way. As of 15:00 on April 2, the main Shanghai copper futures contract was reported at 67,090 yuan/ton, which is down from the previous high of 70,800 yuan/ton, but the overall trend is still high. Even if it is scrap copper, the price has risen. Just after the Spring Festival, many scrap copper purchase station owners made overnight profits. The "worth" of scrap copper that was forced to hoard due to epidemic prevention and control a year ago has skyrocketed, and even "a piece of copper is hard to find" situation. In the domestic market, due to the full recovery of China's economic production, commerce and tourism have also been fully opened up, which has promoted the improvement of the economy and stimulated the demand for copper and other industrial metals. Starting from the third quarter, the growth rate of investment in power grids and power sources will continue to increase in order to achieve the goal of the full-year investment plan. In foreign markets, the rate of new crown pneumonia vaccination in developed countries has gradually increased, and investment in the global communications field has increased the demand for copper materials in 2021. Major mining countries are still facing the impact of the epidemic, and the operating rate of mining facilities has always been difficult to return to normal. The gap could not be filled. As a result, economists have analyzed that the LME copper price for the entire year of 2021 can at least increase by more than 10%. The price increase has been transmitted to the consumer terminal In this surge of raw material prices, the electronics manufacturing industry bears the brunt of the impact of rising raw materials. Whether it is upstream electronic transformers or downstream consumer electronics, home appliances, industrial equipment and other terminal products, metal materials are the

Anji County Kesheng Magnetic Equipment Co., Ltd. website is online

 Time of issue: : 2021-06--28

The company pays great attention to innovation! In recent years, it has received government awards and subsidies, including special energy-saving subsidies, advanced manufacturing awards, and high-tech enterprise awards. The company’s honors in recent years include: two national invention patents, five provincial scientific and technological achievements registration, and undertaking an innovation fund from the Ministry of Science and Technology, a major science and technology project in Zhejiang Province, and winning Huzhou Famous Brand, Government Quality Award, Patent Invention Gold Award, Zhejiang Province Provincial Science and Technology Progress Award, Civilized Unit of Huzhou City, Key Huzhou City Key Enterprise, High-tech Enterprise, Provincial R&D Center, Academician Expert Workstation, Zhejiang AAA Honesty, etc.

The Internet of Vehicles is tightly promoted. Which module should magnetic components pay attention to?

 Time of issue: : 2021-06--28

The rapid development of the Internet of Vehicles has broadened the focus of magnetic component manufacturers on different functional modules in the automotive market. Data shows that it is expected that the Internet of Vehicles may create a trillion yuan market in the next 10 years. In recent years, with the in-depth integration of information and communication technology with the automotive and transportation fields, the Internet of Vehicles has become one of the most clear market demand and most industrial potential Internet of Things application fields in recent years, and it is also the most important scenario for new infrastructure and 5G applications. one. Driven by the Internet of Vehicles, the focus of magnetic component manufacturers on automobiles will also be further broadened. It is no longer limited to the immediate OBC, DC/DC, charging pile and other markets. The Internet of Vehicles market is more likely to become a magnetic component that will show the strength of high-end products in the future. Market. The Internet of Vehicles recreates a 10 trillion market On the morning of September 21, the traffic informatization forum with the theme "Cross-Border Integration-5G Application and Intelligent Transportation" was held at the Suzhou International Expo Center. Wu Hequan, academician of the Chinese Academy of Engineering and expert on optical fiber transmission network and broadband information network, gave a wonderful report on the topic of "5G Empowering the Internet of Vehicles". Wu Hequan believes that "the future development of the Internet of Vehicles to 5G is a direction." The Internet of Vehicles industry is a new type of industry that is deeply integrated with industries such as automobiles, electronics, information communications, and road transportation. It is also a global hotspot of technological innovation and the commanding heights and battlegrounds of future industrial development. At present, the development environment of the domestic Internet of Vehicles industry is accelerating, and the Internet of Vehicles has become the infrastructure for the development of smart cars. China Merchants Securities believes that with the construction and promotion of 5G networks, the development of V2X technology and the increase in downstream applications to stimulate the increase in user value-added payments, China's Internet of Vehicles market is expected to usher in explosive growth in 2020, achieving a year-on-year growth rate of nearly 70%. The overall market size will exceed 100 billion yuan in 2021. CCID data shows that by 2021, China's car networking market will reach 115 billion yuan. McKinsey Consulting predicts that by 2025, the Internet of Vehicles will bring a trillion-dollar economy, saving 30,000 to 150,000 lives each year, and reducing exhaust emissions by 90%; by 2030, Internet of Vehicles products and services The derivative business model will increase the revenue of the automotive industry by 1.5 trillion US dollars (equivalent to 10.2363 trillion yuan). According to statistics, the current global automotive industry scale is 2 trillion US dollars, and the demand for the Internet of Vehicles is almost recreating the market scale of the automotive industry. Ge Yuming, director engineer of the China Academy of Information and Communications Technology and leader of the 5G application industry phalanx car networking group, pointed out that the development of car networking data applications is fast, but the maturity is still insufficient, and there are concerns about standardization, compatibility, openness and safety. . Wu Hequan believes that cars are always on the road, and the innovation of 5G Internet of Vehicles is also on the road. Autonomous driving accelerates landing driven by 5G Autonomous driving research and development is a complex systematic project, and its realization process requires the comprehensive use of multiple technologies, including 5G, artificial intelligence, cloud computing and other cutting-edge technologies, and even blockchain is being used by some companies to develop autonomous driving. The new foundation involves 5G, Internet of Things, Industrial Internet, artificial intelligence, cloud computing, blockchain, big data and many other technologies. These technologies will directly promote the implementation of autonomous driving in the future. The new infrastructure is expected to contribute to the autonomous driving industry. China's development and landing have created an unprecedented window period. He Peng, head of the World Economic Forum's automotive and driverless travel field in China, believes that 5G is an important technology to promote the transformation of the automotive industry to the new four modernizations, but the implementation of this technology will inevitably require a good business model to support. In his view, discussing the value of 5G to the industry is not only from the perspective of the aut

Skills competition was held in the grinding inspection workshop of the second factory on May 25 and June 5, 2018

 Time of issue: : 2021-06--28

On May 25 and June 5, 2018, a skill competition was held in the grinding inspection workshop of the second factory. This competition exercised the level of employees, allowed employees to communicate with each other, boosted morale, and recognized the gaps. The first, second, and third prizes were decided in the competition, and the awards were finally presented. This skill contest ended successfully.