Analysis of Amorphous Nanocrystalline Soft Magnetic Material and Electronic Transformer Market

With the continuous development of electronic technology and the advancement of active devices, the volume and weight of electronic products have been greatly reduced, which has promoted the development of electronic components including electronic transformers in the direction of lightness, thinness and smallness. The production process of electronic transformers is facing a tremendous transformation. The development of electronic transformers to high frequency, low loss, light weight, and small size is an inevitable trend. The core of soft transformers, which are the core components of electronic transformers, will be the brunt of this transformation. The use of amorphous nanocrystalline soft magnetic alloy materials with high saturation magnetic susceptibility, high initial magnetic permeability, and low high frequency loss as an electronic transformer core promotes the miniaturization of electronic transformers and meets the development of the electronic industry. need.

1. With the development of nano science and technology and rapid quenching technology, various new nanomaterials such as nanocrystalline powder materials, nanometer thin film materials and nanoparticle film materials have been continuously developed. Once these new nanomaterials are industrialized, they will greatly promote electronics. Transformers develop in the direction of high-frequency, miniaturization, and slice.

2. Application of amorphous nanocrystalline alloy materials in electronic transformers In general, electronic transformers have the following requirements for their core materials:

(1) High saturation magnetic induction;

(2) High-frequency loss as low as possible;

(3) High initial permeability;

(4) High Curie temperature and good temperature stability;

(5) Good environmental stability and insensitivity to stress;

(6) Some applications such as pulse transformers also require high squareness ratios Br/Bs or low Br. Amorphous nanocrystalline soft magnetic alloy materials can achieve the above performance requirements in the range of 50-1000 kHz (usually below several hundred kHz) due to factors such as tape thickness and resistivity, which makes amorphous nanocrystalline alloys currently in this frequency range. The internal development and application is very active. It has been developed into a variety of magnetic devices widely used in the power industry, electronic industry and power electronics, used as current transformers, switching power supply | regulators, inverter power supply and program-controlled switch power supply Transformers, reactors, filters, and anti-EMI devices.

3. Currently there are promotion and application markets in the following areas:

(1) To replace ultra-thin silicon steel products, it is known from the market demand of ultra-thin silicon steel products of Shanghai Steel Research Institute that ultra-thin silicon steel (thickness<0.1mm) is used in various electronic components such as high-frequency transformers above 400Hz in the 1970s. Reactors, magnetic shields, etc., market demand in this area is relatively large, but the supplier can not meet the market needs, the use of amorphous nanocrystalline alloy material instead, not only can improve product performance, quality and promote miniaturization, but also the price is favorable Can be.

(2) High magnetic permeability and high power magnetic core devices Due to the limitations of domestic ferrite production equipment and technical conditions, high magnetic permeability, high performance, and high power ferrites are difficult to meet the needs of the domestic market, such as the use of amorphous nanometers. The substitution of crystal materials can promote the localization and miniaturization of some electronic devices.

(3) Electronic products with high working environment temperature and harsh environment, and some electronic products such as oil drilling, marine exploration and other special electronic products for use in electronic products, various magnetic devices made of amorphous nanocrystalline alloy material can be used to make it Use to avoid material problems.

(4) Various magnetic devices used in aerospace and other military products. These devices require small and light, good temperature stability, and high magnetic performance. The use of amorphous nanocrystalline alloy materials is far superior to other soft magnetic materials.

(5) Miniaturization of high-frequency, high-current, high-power power transformers, reactors, filters, etc. Currently, most of these devices use ferrite or cold-rolled silicon steel, operating frequency f = 20kHz, working magnetic induction B = 0.2 -0.3T, if the amorphous nanocrystalline alloy core is used, the operating frequency is increased to f=40 to 50 kHz, and the working magnetic induction B=0.5 to 0.6T, which can greatly reduce the volume and size of the magnetic core device.

(6) High-precision magnetic cores for precision transformers. With the development of the electric power industry, high-precision magnetic cores, traditional silicon steel materials, and precision current transformers, precision voltage transformers, and galvanometers for high-precision measurement are required. Can not meet its performance requirements, can only use iron-based nanocrystalline alloys and permalloy materials, the cost performance of both is self-evident.