High-bandwidth Nanocrystalline Toroidal Cores for EMI Suppression

High-bandwidth Nanocrystalline Toroidal Cores for EMI Suppression

With its unique nanocrystalline structure, the nanocrystalline core provides a solution for the power electronics industry that combines high performance, miniaturization, and high reliability. It is one of the fundamental materials supporting the development of industries such as new energy vehicles, renewable energy, and high-end power supplies.

High-bandwidth nanocrystalline toroidal cores offer superior electromagnetic interference (EMI) suppression for next-generation power electronics. Driven by high magnetic permeability and saturation flux density, these advanced cores enable significant miniaturization, higher efficiency, and exceptional reliability. As a critical material innovation, they empower key industries including new energy vehicles, renewable energy systems, and high-performance power supplies.

Key Features

Compared to conventional core materials like silicon steel and ferrite, nanocrystalline cores deliver several key advantages:

Ultra-high permeability – up to 80,000, over 12 times that of Mn-Zn ferrite, enabling substantial size reduction of inductors under the same conditions.

Extremely low core loss – only about one-third of ferrite at high frequencies. This is attributed to low hysteresis loss (due to fine nanocrystalline grains with low magnetization resistance) and low eddy current loss (due to high resistivity that effectively suppresses eddy currents).

Excellent frequency and temperature stability – stable performance across 10 kHz to 5 MHz, with an operating range of -40°C to 180°C for reliable operation in harsh environments.

High saturation flux density – Bs up to 1.2–1.25 T, far exceeding that of ferrite, allowing for higher current handling without saturation.

Winding Specification

Material

Electrical Parameters

Target Applications

• New Energy Vehicles (NEVs): Essential for On-Board Chargers (OBCs), DC-DC converters, and main traction inverters, effectively suppressing high-frequency switching noise while reducing component size and weight.

• Renewable Energy Systems: Critical in solar PV inverters and energy storage system (ESS) power conversion, ensuring compliance with strict grid EMC standards under high-voltage, high-power operation.

• Data Centers & AI Computing: Vital for high-efficiency server power supplies (CRPS), providing ultra-compact EMI filtering to handle intense transient loads in AI hardware and cloud infrastructure.

• Industrial & Medical Equipment: Crucial for high-end variable frequency drives (VFDs) and sensitive medical electronics, protecting systems from ground loops and destructive common-mode noise.

Why Partner With Us？

• Proven Industry Expertise: With over 20 years of industrial experience and a solid foundation established in 2013, we operate five major core industrial lines across multiple specialized manufacturing bases to ensure top-tier product scale and stability.

• Global Quality Certifications: Our facilities strictly adhere to international automotive and industrial standards, backed by a complete set of major credentials including IATF16949, ISO9001, ISO14001, ISO45001, and ISO50001.

• Strong R&D & Technical Innovation: Driven by dedicated research teams and specialized new-design laboratories, we possess extensive patent portfolios and advanced testing capabilities to provide highly reliable, customized magnetic solutions.

• Smart & Scalable Manufacturing: We leverage advanced ERP and MES-managed smart manufacturing systems to optimize production capacity, securing a highly dependable supply chain for international clients across the EU, US, and globally.