Amorphous cores are magnetic components processed using amorphous materials. Depending on the material used for the amorphous ribbon, they can be classified as iron-based amorphous or cobalt-based amorphous. Based on the shape of the material, they can be categorized as ribbon-type magnetic cores or powder-type magnetic cores. Amorphous core transformer has a significantly higher saturation magnetic density compared to conventional ferrite and powder cores, but their conductivity rapidly decreases with increasing frequency. They are typically used in frequency ranges ranging from tens of kilohertz to hundreds of kilohertz.
Amorphous alloys, also known as metallic glasses, are a new type of material that emerged in the 1970s. They are produced by rapidly cooling liquid steel into thin ribbons with a thickness of around 30 micrometers using rapid solidification techniques. The resulting solid alloy (thin ribbon) has a non-crystalline structure, unlike the atomic regular arrangement found in cold-rolled silicon steel materials. It is precisely this atomic arrangement in the alloy, with its atoms in an irregular amorphous structure, that gives it a narrow B-H loop and high permeability with low losses.
At the same time, the irregular arrangement of atoms in the amorphous alloy restricts the free passage of electrons, resulting in a resistivity 2-3 times higher than that of crystalline alloys, which helps to reduce eddy current losses. Amorphous core distribution transformer made from amorphous alloys can reduce the no-load losses by around 75% compared to traditional transformers that use silicon steel laminations, resulting in significant energy-saving and environmental benefits. When amorphous alloy transformer cores are used in oil-immersed transformers, they can significantly reduce the emissions of various harmful gases. Therefore, an increasing number of manufacturers are adopting amorphous alloys as raw materials for transformer cores.
Amorphous magnetic cores can replace silicon steel, permalloy, and ferrites.amorphous core transformer advantages is can work as main transformers in various forms of high-frequency switch-mode power supplies.
Amorphous steel core transformer also can work as control transformers, filter inductors, energy storage inductors, reactors, magnetic amplifiers, saturated reactors, EMC filters, common-mode and differential-mode inductors for ISDN micro-isolation transformers.
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Moreover amorphous core transformer also can used in various types of inductor cores with different precision requirements. Here are specific applications in various fields:
1. Automotive Applications: Amorphous magnetic cores can be used in the automotive field to support car audio systems and eliminate interference from surrounding signals. The ability to eliminate signal interference is mainly related to the quality of electronic components. The better the quality of the magnetic core, the stronger its anti-interference capability.
2. Power Supply Applications: In the power supply field, amorphous magnetic cores can be used to provide energy storage and filtering inductors, ensuring stable current output. Stable current output is crucial for the normal operation of electronic devices, especially for high-power devices that require higher current stability.
3. Computer Peripheral Circuit Applications: In the field of computer peripheral circuits, the application of amorphous magnetic cores can improve the performance of devices. However, different circuits require different specifications of magnetic cores, so it is important to choose the right type of magnetic core based on specific requirements, rather than simply following popular trends in the market.
4. Power Electronics Devices: The high permeability, low hysteresis, and low resistivity of amorphous magnetic cores make them suitable for use as magnetic core materials in high-frequency inductors and transformers. They can be applied in AC transformers, high-power output transformers, resonant transformers, output inductors, compensation inductors, and other power electronic products.
5. Automotive Electronics: Amorphous magnetic cores can be used in magnetic core components for automotive safety systems, end applications, autonomous driving, human-machine interaction, and electric drive systems. They find applications in areas such as automotive braking systems, engine control systems, feedback environment control circuits, bearingless motors, hydraulic pumps, angular displacement sensors, and more.
6. Oil and Gas Exploration: Due to the high-temperature corrosion resistance, gradient magnetization characteristics, and low hysteresis losses of amorphous magnetic cores, they are excellent materials for magnetic core parts of well logging tools, auxiliary sensors, magnetic flow meters, and other instruments used in the oil and gas exploration field.
7. Others: Amorphous magnetic cores can be used as materials for high-speed magnetic storage, manufacturing high-power inverters, and in applications such as RF sources and telecommunications equipment.
In conclusion, amorphous cores are suitable for use in the fields of power, automotive, oil and gas. Therefore amorphous core transformer advantages are high permeability, low hysteresis, low resistivity, and ability to be manufactured in various shapes.
