The Current International Standards And Development Of Magnetic Components And Ferrite Materials

Magnetic materials family is divided into the sub-magnetic metal and non-metallic magnetic materials (ferrite materials) on chemical composition basis. A wide range of applications is available, involving electronic information, machinery and electronics, automobile, metallurgy, aerospace, aviation, transportation, engineering, biomedical and other applications. In the electronic information, whether it is consumer electronics, industrial products or communications equipment, computers and peripherals, instrumentation and modern military equipment in the use of magnetic materials and so on a large number of components and equipment, equipment and systems from A decisive role. Over the years, the world has been working with magnetic materials and components of the standard system (repair) work out. Developed countries in particular have developed a magnetic material, the various components of the series. International Electron-technical Commission (IEC) set up IEC/TC51 magnetic components and ferrite materials Technical Committee in 1958, responsible for electronics and communications equipment to use magnetic components and related accessories, measuring and testing methods, inductors, electronic transformers, Microwave ferrite devices and a variety of ferrite materials of international standards-making; at the same time the IEC set up IEC/TC68 magnetic alloy steel technical committee, which is responsible for the magnetic alloy steel and professionals in the field of international standardization, has been published relating to classification of magnetic materials, soft magnetic metal, permanent magnet and electromagnetic properties of measurement standard 14. In 1989, China set up the CSBTS/TC89 “National magnetic ferrite materials and components for Standardization Technical Committee” based on IEC/TC51, responsible for the magnetic components and ferrite materials National Institute of Standards and industry-standard system (repair) work will be; In 1997 and set up a relatively IEC/TC68 population CSBTS/TC228 “ the National Standardization Technical Committee electrical alloys” which is responsible for the magnetic alloy and the National Institute of Standards and steel industry-standard system (repair) work is scheduled. With the market economy and globalization, in order to adapt to the china’s joining to the WTO on international standards convergence of the needs of international and foreign advanced standards of the country's current situation and development trends of China's magnetic materials and components to the standardization Crucial. In this paper, magnetic components and ferrite materials of international standards and foreign standards and the status of developments to make a brief presentation.

Foreign advanced standards

Foreign advanced standards refer to those without the International Organization for Standardization (ISO) to confirm and announce the standards of other international organizations, regional organizations, standards, technical standards of economically developed countries, the international authoritative body of international standards and have an impact on the company. The advanced standards, regional economic and technological standards of developed countries are: the European Committee for Standardization (CEN), the European Committee for Electro-technical Standardization (CENELEC), such as the development of standards, the American National Standards (ANSI), the German national standards (DIN), the British National Institute of Standards (BS ), Japan Industrial Standard (JIS), the French National Institute of Standards (NF), the Russian national standard (ГОСТ) and so on.

Over the years, with Britain, France, Germany and the United States, mainly in Western Europe, has been committed to international and regional standardization activities in an attempt to control long-term international technical standards for power, and spare no effort to become the national standards with international standards. To achieve European standards and international standards convergence, in 1990 CENELEC and IEC signed a bilateral cooperation agreement in 1991, CEN and ISO also signed a technical cooperation agreement. The two agreements established the principle of giving priority to international standards, the emphasis on co-operation so as to avoid duplication of work. CEN / CENELEC equivalent to as much as possible to use existing international standards by ISO / IEC or CEN / CENELEC standardization projects undertaken by the two parallel institutions for approval, after the passage of the draft standard, that is, as an international standard and the implementation of European standards published at the same time.

From the collection of relevant materials, inductors, transformers of the standard information, Britain, France, Germany and other countries to adopt the European standard (EN) and a larger proportion of IEC standards and criteria for the title of the three countries have many similarities. Germany to the standards, for example, the magnetic materials, inductors, transformers 67 standard, the standard 39 Direct tantamount to the adoption of European standards, EN standards in the code before the crown directly on the DIN; 11 to adopt the same standard IEC standards directly, IEC standards in the code before the crown directly on the DIN. Above the national standard in three basic aspects: First, the ferrite core, as well as electronic transformers, inductors, the size of the core standards; Second, the quality certification and to use core components of the standards; Third, the measurement methods and basic standards. From the analysis of the standard code, EN6×××× standard practice with the IEC standards are corresponding. And in today's more popular film-standard surface-mount components are very few, only the German standards:(1) DIN EN 60204-1-2000 adopt the same standards to European standards EN 62024-1:2000: high frequency inductive components - the electrical properties & the method of measurement; (2) DIN EN62025-1:2000:high frequency inductive components – non-electronic property and performance measurement; and these two projects have been as IEC standard criteria for the final draft.

In addition, Britain, Germany and Europe adopted the same standard

  1. EN 129000/A1-96: RF inductors with the fixed winding norms etc.
  2. EN 129100/A-96: sub-specification: inductors with surface-mounting winding etc.
  3. EN 129101/A1-95: blank detailed specification: quality assessment using inductors with surface-mounting winding, assessment of the level of E-class.
  4. EN 129102/A1-95: blank detailed specification: quality assessment using inductor with surface-mounting winding, assessment of the level of P-class.

Japan has its own system of standards, released in only 28 and magnetic materials, components related to the standard, good correspondence. There are magnetic (million) pieces of product standards, it corresponds to the standard testing methods. In these standards, JIS C2561: 1992 version “ferrite cores measurement of material properties” we should learn from it for our ferrite magnetic materials measurement standards for reference. The standards for the evaluation of the Magnets of electromagnetic properties, physical properties and mechanical properties of the test method, test samples of its shape (including circular, square (round) rod, such as wafer 11 samples) and size made Provides that the standards of electrical, magnetic, physical performance parameters including: initial permeability μi, complex permeability, initial permeability of the temperature coefficient aui, amplitude permeability μa, Q value, relative loss factor tanδ / μi, Curie temperature θC, loss of density, magnetic properties of DC saturation magnetic flux density Bs, residual magnetic flux density Br, coercive force Hc. there are volume resistivity, density and mechanical properties of bending strength and so on.

In contrast, comparing Russia standard to the international standards / European standards or the standards of developed countries, the biggest difference is mainly lied in the system of standards and standards of the poor in areas such as up-to-date, the standard coverage of the narrow, old standards.

Internationally recognized industry standards groups, we are more familiar with the material U.S. experiments Association standard (ASTM). ASTM standards focused on a variety of material specifications and test methods. In one of the few standard magnetic materials, there are two standards to help us:

  1. ASTM A1009-2000:power transformers and inductors used in filtering high-frequency (10kHz ~ 1MHz) MnZn ferrite materials norms:;, which provides for power transformers with 4 grades and materials used in filtering inductance 3 grades of magnetic materials requirements
  2. ASTM A1013-2000 "with Voltmeter - ammeter - watt soft magnetic components include measuring the temperature under the provisions of the high-frequency (10kHz ~ 1MHz) core loss methods

U.S. military standard (MIL) also has an impact on the international standard. On the magnetic components, the corresponding number is that for the Federal FSC5950, mainly inductors and transformers in the second category of products, involving Magnets, not the basic core of the existing standard. MIL standard is still far more advanced technical requirements of the standard, for a long time, not only as the U.S. Federal acquisition based on the technology, but also as our country has been the development of national standards for military and military industry standard reference for the focus. In FSC5950, contains a total of 213 valid current inductors, transformers standards, and standards in force in 16 non-governmental standards.

International Electro-technical Commission (IEC) standards

From the latest information released by the IEC/TC 51 standards, IEC/TC51 force has 60 publications (including amendments to add one). According to basis categories and the standard statistical classification shown in Table 1. As can be seen over the years, IEC/TC51 has been a departure from basic standards to the development of soft magnetic core, core-based standard for the mainstream, and gradually to the general components, a new direction for the development of standard components.

In recent years, IEC/TC51 around in the international community widely used surface-mount components to start the following works:

  1. Establish IEC61860: 2000 version “made of low magnetic oxide core size”, which on the surface for the installation of transformers used to provide a series of standard-size core.
  2. Publish IEC 62024: high frequency inductive components and electrical performance measurement Part 1: “Naheng range chip inductors”, IEC 62025 “inductive components of non-high-frequency electrical properties and their measurement Part 1: “Electronics Communications equipment with a fixed surface-mount inductors”, standard, inductance chip will be the basis of standard components.
  3. IEC/TC51 as a new project proposals, “digital noise reduction chip components with Part 1: Terms and definitions Part 2: Measurement” was also on the agenda; IEC 62211 “inductance component reliability management” IEC will also serve as a new type of emerging standards.
  4. IEC/TC51 in the standard system has also made certain adjustments to the standard form of a series of IEC/TC51 in recent years become a standard feature of the new. Such as:
  5. (A) IEC 60424 series of standards: ferrite core surface defect limit guidelines Part 1: General Provisions, Part 2: RM core, Part 3: EPD core and the E-shaped core, Part 4: core ring;

    (B) IEC 60401 series of standards: soft magnetic material core of the terminology Part 1: terms of physical defects, Part 2: reference to the size, Part 3: transformers and inductors factory core catalog data guidelines;

    (C) IEC 62044 series of standards: soft magnetic material core of the measurement Part 1: General Provisions, Part 2: low level of excitation of magnetic properties, Part 3: High-level excitation of magnetic properties, etc.

  6. IEC/TC51 this year also launched a “public norms accessible”  (PAS)  draft, “close to the inductive switch magnetic oxides produced by the size of half a can-shaped core” in order to speed up the development of new technologies in the field of standardization”

IEC/TC51 last year strategic policy statement pointed out that with the radio communications such as mobile phone growth, high-frequency electromagnetic compatibility (EMC) components of the increased demand. As a result, ”high frequency” and “low-dwarf” will be the magnetic component of the trend. In the next five years, IEC/TC51 to meet digital TV, automotive electronics and networking of these new market demands, which will accelerate the development of relevant standards.

Conclusion

With international trade and cultural exchange, science and technology continue to expand, especially with the globalization of trade and economic integration of high-tech, as well as the rapid development of international standards on the growing demand. To adopt international standards, or international standards or the standards of international convergence has become a global trend of development in general. Active use of international standards and achieving the convergence criteria, it will be a overwhelming 21st century world.

Magnetic components and ferrite materials is a very wide range of applications on the basis of the key components and functional materials, and the decision directly affects the level of cutting-edge technology, the pace of development of the national economy and raising people’s quality of life, and the magnetic components and ferrite materials Standards for the quantity and quality of decisions and also influence the magnetic ferrite materials and components industries. Therefore, to enhance the magnetic components and ferrite materials standards, and speed up the magnetic components and ferrite materials research and development of standards have before us is an important issue.