Jiayou Insights | In-Depth Analysis: Why Are R&D Barriers So High for Automotive‑Grade Amorphous Magnetic Cores?
The new‑energy vehicle industry is undergoing rapid iteration, with continuous advancements in vehicle intelligence and electrification, driving a comprehensive transformation of in‑vehicle electronic systems. From on‑board chargers (OBCs) and motor inverters to various types of automotive power supplies, the performance requirements for core components are steadily rising. . As a key foundational material for automotive electronics, Automotive-grade amorphous/nanocrystalline magnetic cores ， It is the core key to ensuring the stability, energy efficiency, and service life of the automotive power system. , and also a cutting-edge technological hub in the field of new materials today.
Many people wonder: while magnetic cores have long been well‑established in industrial and home‑appliance applications, why is developing a “automotive‑grade” version tailored for new‑energy vehicles so challenging that it has become a major pain point in the industry? Today, we’ll take an in‑depth look at the four key R&D barriers.
I. A test of a wide temperature range, where thermal stability is difficult to control.
The operating environment of new-energy vehicles is far more demanding than that of conventional consumer electronics. Throughout all driving scenarios—whether cruising, accelerating and decelerating, or switching between high and low speeds—on-board electronic devices must withstand… -40℃ to above 150℃ An extremely large temperature difference.
Although the magnetic core exhibits excellent overall magnetic performance, its magnetic properties are highly sensitive to temperature variations; conventional industrial-grade magnetic cores… Difficult to adapt Suitable for extreme vehicle‑operating conditions. Under high‑temperature, high‑load conditions, conventional materials can experience shifts in magnetic properties, a decline in saturation magnetization, and a substantial increase in magnetic losses, directly leading to reduced power‑conversion efficiency and operational instability.
To overcome this challenge, the R&D team must implement targeted optimizations. High-Performance Magnetic Material Formulation System , adjusting the material’s microstructure while iteratively implementing precision annealing and modification. The processing technology enhances the material’s high‑temperature resistance and Curie temperature, ensuring stable magnetic performance across an ultra‑wide temperature range. Through repeated formulation optimization and temperature‑adaptation testing, this thermal‑control technology has become the first critical threshold in the development of automotive‑grade magnetic cores.
II. Harsh high-frequency operating conditions pose significant challenges, with exceptionally low losses presenting a formidable barrier.
Unlike conventional internal‑combustion vehicles, the power‑supply system of new‑energy vehicles operates continuously at high frequencies—ranging from tens to hundreds of kilohertz. Under such high‑frequency operating conditions, the material’s ability to mitigate losses directly affects the vehicle’s overall energy efficiency and the service life of its components.
Conventional magnetic cores, under high-frequency operating conditions in automotive applications, Eddy current losses and hysteresis losses will increase significantly. Not only does this reduce energy conversion efficiency, but it also causes the magnetic core to overheat continuously, leading to excessive temperature buildup; prolonged operation can result in component aging and even failure or system shutdown.
To meet automotive-grade ultra-low-loss standards, it is necessary to overcome the limitations of conventional manufacturing processes and adhere to established specifications. Composition ratio, nanoscale structural regulation, and precise annealing process control By leveraging core technologies and optimizing the magnetic domain structure of materials, we can fundamentally reduce high-frequency losses. This places extremely stringent demands on a company’s material R&D precision and its ability to control microstructural features.
III. Ten-year long-term reliability, but batch-to-batch consistency is difficult to control.
The core principles for automotive components are high reliability, long service life, and superior stability. Industry standards mandate that critical in-vehicle components must have a service life of at least 10 years and withstand, over the long term, complex and harsh operating conditions such as vibration, impact, and alternating high and low temperatures.
The manufacturing process for magnetic cores is highly precise yet complex. It begins with alloy melting and rapid quenching to form ribbons, Precision winding From annealing and solidification to insulating encapsulation, the entire process demands extremely high precision. During production, even minor fluctuations in parameters such as melting temperature, rapid quenching speed, and annealing duration can alter the material’s amorphous structure, leading to variations in the magnetic properties of batch‑to‑batch products.
Therefore, the development of automotive-grade magnetic cores not only requires breakthroughs in material formulations but also necessitates the establishment of… A high-standard, meticulously refined end-to-end process control system Enterprises must rely on large-scale production facilities and proven mass‑production expertise, and conduct extensive reliability‑simulation testing to iteratively calibrate process parameters, in order to effectively address the challenge of batch‑to‑batch consistency.
IV. Automotive-grade certification is stringent, with increasingly rigorous entry barriers at every stage.
Even after overcoming the challenges of materials R&D and mass-production processes, companies must still surmount one final hurdle: the stringent automotive‑grade industry certifications.
To enter the automotive supply chain, manufacturing companies must pass IATF 16949 Automotive Industry Quality Management System Certification The certification process not only conducts a comprehensive assessment of the core performance metrics of magnetic cores—such as wide‑temperature stability, high‑frequency loss, and durability—but also rigorously reviews the enterprise’s precision manufacturing processes, end-to-end quality‑control system, and product traceability capabilities, among other comprehensive qualifications.
Most enterprises deeply engaged in the industrial and civil sectors have production standards and quality-control systems that are only suited to ordinary operating conditions, It's hard to achieve. The automotive industry demands precision, high reliability, and exceptional accuracy. Stringent certification standards and lengthy review processes make it difficult for many conventional companies to enter the in-vehicle systems sector, further raising the barriers to market entry.
Written at the end
It is clear that the development of automotive-grade magnetic cores has never been a matter of breakthroughs in a single material technology, but rather… Formula development, precision manufacturing, mass-production control, reliability validation, and system certification A comprehensive showdown of all-round strengths.
As new‑energy vehicles advance toward higher-end segments, greater power output, and extended range, the trends toward higher switching frequencies and miniaturization in on‑board power supplies are becoming increasingly pronounced, while market demands for the performance of automotive‑grade magnetic cores continue to rise. Only by continuously breaking through core technological barriers can we firmly establish a solid foundation for the critical components of new‑energy vehicles.
As a leading enterprise specializing in the R&D, manufacturing, and automotive‑grade implementation of magnetic cores, Jiayou Amorphous consistently focuses on automotive applications, continuously refining its automotive‑grade amorphous magnetic core products to deliver wide‑temperature stability, ultra‑low losses, and exceptional consistency. Leveraging mature technologies and robust mass‑production capabilities, the company supports the advancement of next‑generation electric‑vehicle electronic systems.
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Anyang Kayo Amorphous Technology Co., Ltd. was established in 2011 with a registered capital of 20 million RMB. It is a high-tech enterprise focused on the research, development, production, sales...
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