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The Applications of Amorphous Nanocrystalline Soft Magnetic Material

July 15, 2020


The Applications of Amorphous Nanocrystalline Soft Magnetic Material


With the rapid development of the electronic information industry, the three main markets of high-frequency switching power supplies: communications, computers and consumer electronics will also develop rapidly. Whether it is an AC/DC or DC/DC power supply, in addition to power transistors, main transformers, chokes and other inductors (such as anti-noise filters) made of high-performance magnetic materials are extremely important components, and their magnetic properties and size are directly related to the conversion power and power density of the power supply. The thickness and resistivity of amorphous nanocrystalline soft magnetic alloy materials determine the best application frequency range is the KHz band, which coincides with the current high-frequency switching power supply frequency band, so the amorphous nanocrystalline alloy magnetic device for high-frequency switching power supply Research and development applications are very active.


We researched and developed a variety of specifications of amorphous nanocrystalline alloy toroidal type, C type, CD type and other switching power supply power transformer cores over years, which are used in intermediate frequency power supplies, inverter power supplies, program-controlled switches and inverter welding machines Power transformers, etc., adjust their soft magnetic characteristics through heat treatment methods, processes and processing techniques, making them suitable for all types of inductive devices in high-frequency, high-power, high-current switching power supplies.


The wide application of high-frequency technology has made anti-EMI technology a new technology and a new industry. It is more urgent to solve the electromagnetic compatibility of electronic equipment, and various magnetic devices such as anti-electromagnetic interference and noise suppression are widely used. One of the key components of these devices is the inductive device.


Common mode inductance, saturable inductance, and peak suppressor are all small-signal working conditions, and the larger the inductance, the better. Common mode inductors, saturable inductors and spike suppressors made of amorphous nanocrystalline alloys have the following performance characteristics:

1. High effective magnetic permeability, large inductance and small volume;

2. Low play ability and low loss;

3. Few winding turns and small distributed capacitance;

4. High saturation magnetic induction, good effect to deal with noise spikes;

5. High Curie point and good temperature stability;

6. Good frequency characteristics;


The high magnetic permeability of the amorphous nanocrystalline alloy can greatly reduce the core size of the common mode inductance and spike suppressor. Especially for high current and high power applications, this type of alloy is used as the common mode inductance core. Good value for money. Due to the wide application of switching power supply technology, common-mode inductance against electromagnetic interference is an indispensable device in many electronic equipment. In addition to considering the 50Hz power frequency, it also has certain requirements for high-frequency performance. It is the best choice to make this kind of inductance device with iron based amorphous nanocrystalline material.

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