Welcome To Huzhou Careful Magnetism & Electron Group
Views: 0 Author: Site Editor Publish Time: 2026-04-02 Origin: Site
Product Series: High-Frequency Transformer Made with Amorphous Core Material
Brand: Careful (Huzhou Careful Magnetism & Electron Group)
In today's pursuit of ultimate energy conversion efficiency, equipment miniaturization, and peak system performance, every leap in power electronics depends on innovation in fundamental materials and components. The transformer—serving as the "heart" of power supply systems for voltage conversion, energy isolation, and transmission—directly determines the efficiency, size, and reliability of the entire system. Traditional transformers, constrained by the physical limitations of conventional magnetic materials such as silicon steel, struggle to advance toward higher frequencies, lighter weight, and lower losses.
Huzhou Careful Magnetism & Electron Group (Careful), a leader deeply engaged in the field of soft magnetic materials and components, leverages its advanced R&D and manufacturing capabilities in amorphous/nanocrystalline soft magnetic materials to launch the High-Frequency Transformer Made with Amorphous Core Material. This product is not a simple material substitution for traditional transformers, but a comprehensive innovation encompassing magnetic circuit design, structural technology, and application scenarios. With its extremely high permeability, ultra-low losses, and excellent frequency characteristics, it provides an ideal transformer solution for new energy, rail transit, data centers, smart grids, and other high-end fields.
The performance foundation of the amorphous core high-frequency transformer lies in the amorphous alloy ribbon it uses. This material is produced by an ultra-rapid solidification technology (cooling rates reaching millions of degrees Celsius per second), causing the molten alloy to instantly solidify into a solid thin ribbon with atoms arranged in a long-range disordered state—conferring physical properties completely different from traditional crystalline materials.
1.1 Ultra-Low Loss Characteristics (Especially Outstanding at High Frequencies)
Amorphous material is extremely thin (typically only 20-40 microns) and lacks a crystalline structure, so its eddy current loss is far lower than that of traditional silicon steel. At operating frequencies of 20 kHz and above, the unit loss of an amorphous core is only 1/5 to 1/10 that of ordinary silicon steel. This means that under high-voltage, high-frequency switching conditions, Careful's amorphous transformers generate very little self-heating. This not only improves efficiency (achievable levels above 98%) but also reduces the burden on the cooling system, further simplifying the overall equipment design.
1.2 High Permeability and Low Magnetizing Current
Amorphous alloys have extremely high initial permeability (μi can reach tens of thousands to hundreds of thousands). This allows the transformer to achieve the required inductance with fewer winding turns, thereby:
Reducing copper usage: Lowering I²R losses and weight.
Lowering magnetizing current: Improving power factor and reducing reactive losses.
Enhancing response speed: Rapid magnetization and demagnetization cycles, suitable for high-frequency, dynamic load scenarios.
1.3 Excellent Temperature Stability
Amorphous materials have a relatively high Curie temperature. Within the operating temperature range (-55°C to +130°C), their permeability and loss characteristics remain relatively stable. This ensures that Careful transformers deliver consistent, reliable performance in wide-temperature-variation environments such as outdoor power supplies and industrial inverters, avoiding system instability caused by temperature drift.
Having advanced material is only the first step. Transforming it into a reliable, high-efficiency transformer product requires Careful's precision manufacturing and system integration capabilities.
2.1 Core Forming & Heat Treatment Process
Amorphous ribbon is very thin and relatively brittle, making core forming challenging. Careful uses proprietary automatic winding equipment to strictly control winding tension and interlayer alignment, ensuring a closed, tight magnetic path. Subsequently, transverse or longitudinal magnetic field heat treatment is performed in a precision-controlled vacuum or protective atmosphere furnace to optimize core performance in different magnetization directions, relieve internal stress, and further reduce losses.
2.2 Compact Structure & Efficient Heat Dissipation Design
Careful amorphous transformers typically use a toroidal (ring core) or rectangular (C-core) structure, providing a closed magnetic path with very low leakage flux. Windings are made of multi-strand twisted wire (Litz wire) or flat copper foil to effectively suppress skin effect and proximity effect at high frequencies, maximizing copper utilization. The entire transformer can be vacuum potted with thermally conductive insulating resin, which not only enhances mechanical strength but also forms efficient thermal conduction paths, ensuring rapid internal heat extraction.
2.3 Wide Frequency and Power Coverage Capability
Based on the characteristics of amorphous material, Careful transformers operate over a frequency range covering 1 kHz to 100 kHz, with single-unit power ratings from tens of watts to hundreds of kilowatts. This wide adaptability allows them to flexibly match different power supply topologies (such as half-bridge, full-bridge, push-pull, LLC resonant, etc.).
To understand the value of Careful's amorphous transformer, a direct comparison with traditional materials is helpful:
Performance Indicator | Careful Amorphous Core Transformer | Traditional Silicon Steel Transformer | Ferrite Core Transformer |
|---|---|---|---|
Operating Frequency | High (1kHz - 100kHz) | Low (≤ 400Hz) | Very High (≥ 20kHz) |
Permeability | Extremely High | High | Moderate |
High-Frequency Loss | Extremely Low | Very High | Low |
Saturation Flux Density | High (≈1.56T) | Very High (≈2.0T) | Low (≈0.5T) |
Size & Weight | Small, Light | Large, Heavy | Small, Light |
Temperature Stability | Excellent | Excellent | Poor (low Curie temperature) |
Cost | Moderate | Low | Moderate |
Key Conclusions:
Vs. Silicon Steel: Careful's amorphous transformer has a huge efficiency advantage at high frequencies, with size and weight reductions of over 50%. It is the ideal choice to replace traditional line-frequency transformers.
Vs. Ferrite: The saturation flux density of amorphous material is three times that of ferrite. This means that for the same power rating, the amorphous core's cross-sectional area can be smaller, and its anti-saturation capability is stronger—particularly suitable for handling large currents and high peak power scenarios.
With its outstanding comprehensive performance, Careful's amorphous core high-frequency transformer has become the preferred choice for the following high-end application fields:
4.1 New Energy & Electric Vehicles
Photovoltaic Inverters: Used for boost or isolation stages to improve the overall generation efficiency of PV systems (especially suitable for 1500V PV systems).
On-Board Chargers (OBC) & DC-DC Converters: The requirements for high frequency, high efficiency, and high power density closely match the characteristics of amorphous transformers, helping achieve lightweight EVs and fast charging.
Charging Pile Modules: Achieve high-efficiency power conversion within limited cabinet space, reducing operational energy consumption.
4.2 Rail Transit & Industrial Power Supplies
Auxiliary Traction Power Supplies: Convert overhead line high voltage (DC 750V/1500V/3000V) to low-voltage auxiliary power in railway locomotives and subway cars. Careful amorphous transformers excel in this role due to their high reliability and impact resistance.
Induction Heating Power Supplies: Under high-frequency, high-current conditions, amorphous transformers transfer energy efficiently, reducing equipment energy consumption.
4.3 Data Centers & Telecom Power Supplies
Server Power Supplies (PSU): To meet the stringent 80 PLUS Titanium efficiency standard (>96% at half load), amorphous transformers play a key role in the main power stage or resonant circuits.
5G Telecom Power Supplies: Outdoor base stations require wide-temperature, high-efficiency, maintenance-free power systems—applications where the temperature stability and high efficiency of amorphous transformers offer significant advantages.
4.4 Smart Grids & Power Quality
Active Power Filters (APF) & Static Var Generators (SVG): Used for high-frequency isolation and coupling, improving dynamic response speed.
DC Transformers (DCT): Perform voltage conversion and energy management in DC microgrids.
In an era of ever-stringent energy efficiency regulations and premium space, the room for improving traditional transformers is extremely limited. Huzhou Careful Magnetism & Electron Group, with its deep understanding and engineering application capabilities of amorphous/nanocrystalline materials, presents the High-Frequency Transformer Made with Amorphous Core Material. It is more than an electronic component; it is a systematic solution for achieving high-efficiency, high-frequency, high-power-density energy conversion.
Choosing Careful's amorphous transformer means you will:
Increase Product Efficiency: Easily meet international energy efficiency standards (e.g., DoE Level VI, CoC Tier 2).
Reduce Product Size: Achieve more compact, lighter overall equipment design at the same power rating.
Enhance Product Reliability: Low temperature rise from low losses, combined with stable performance over a wide temperature range, effectively extends equipment life.
