1K107 Nanocrystalline Iron Cores for Efficient Transformers

 

 

 

The performance characteristics of nanocrystalline iron core make it advantageous in medium-high frequency, low-loss, high-sensitivity scenarios. Its main application fields include:

 

Power Electronics Field

Switching power supply transformers (50kHz-200kHz) and charging pile module iron cores: Utilize low iron loss to improve energy efficiency and reduce the volume of heat dissipation modules;

 

Uninterruptible power supplies (UPS) and inverter iron cores: Adapt to wide voltage fluctuations and ensure stable magnetic performance.

 

New Energy Field

On-board transformers for new energy vehicles (e.g., OBC on-board chargers): Withstand high temperatures above 120°C and meet high power density requirements;

 

Photovoltaic inverter reactors: Suppress current harmonics and improve grid compatibility.

 

Electromagnetic Compatibility (EMC) and Detection Field

Common-mode inductor iron cores: High magnetic permeability can effectively filter out high-frequency common-mode interference (e.g., EMC certification requirements for home appliances and industrial equipment);

 

Precision current transformers (e.g., metering CT): High magnetic permeability improves current measurement accuracy (error can be controlled within 0.1 class).

 

Security and Medical Fields

Residual current devices (RCD): Rapidly respond to weak leakage currents (trip immediately when ≥30mA);

 

Power supplies for medical equipment (e.g., MRI nuclear magnetic resonance equipment): Low loss can reduce electromagnetic interference and ensure medical detection accuracy.

 

 

Nanocrystalline Iron Core Comparison with other Iron Cores

 

To clarify the positioning of nanocrystalline iron core more clearly, the following table compares its core differences with silicon steel, amorphous alloys, and ferrites:

 

Performance Indicator	Nanocrystalline Iron Core	Silicon Steel (30Q130)	Amorphous Alloy Iron Core	Ferrite (Mn-Zn)
Saturation Magnetic Induction (Bs)	1.2-1.5 T	1.8 T	1.5-1.7 T	0.3-0.5 T
Initial Magnetic Permeability (μi)	5×10⁴-2×10⁵ H/m	3×10³-5×10³ H/m	1×10⁴-3×10⁴ H/m	1×10³-1×10⁴ H/m
Iron Loss (P₀.₅/₅₀)	0.15-0.3 W/kg	1.0-1.5 W/kg	0.1-0.2 W/kg	5-10 W/kg (high at power frequency)
Iron Loss (P₁/₂₀ₖ)	15-25 W/kg	150-200 W/kg	20-30 W/kg	3-5 W/kg (excellent at high frequency)
Operating Frequency Range	50Hz-1MHz	50Hz-1kHz	50Hz-100kHz	1kHz-100MHz
Cost (Relative Value)	2.5-3.0	1.0 (Benchmark)	2.0-2.5	1.5-2.0
Typical Applications	Medium-high frequency power supplies, sensors	Power frequency transformers, motors	Medium-frequency transformers, reactors	High-frequency filters, antennas

 

 

With its core advantages of low iron loss, high magnetic permeability, and wide-temperature stability, nanocrystalline iron core has become a preferred soft magnetic component in medium-high frequency (50kHz-1MHz) and high-sensitivity scenarios, especially with rapidly growing demand in new energy, power electronics, and precision detection fields. Its main shortcomings (low Bs, high cost) limit its application in power frequency high-power fields. Therefore, practical selection must consider four factors: "frequency, power, cost, and space":

 

• For power frequency high-power (e.g., distribution transformers): Prioritize silicon steel;
• For medium-high frequency low-loss (e.g., charging piles, on-board power supplies): Prioritize nanocrystals;
• For ultra-high frequency (e.g., radio frequency filtering): Prioritize ferrites;
• For medium-frequency low-cost (e.g., ordinary inverters): Amorphous alloys can be considered.