For soft magnetic components, stable magnetic performance is the cornerstone of reliable operation. Performance data are not merely nominal specifications; they reflect the material’s intrinsic properties and serve as a tangible commitment to delivering on customer projects.

Within Anyang Jiayou Amorphous Technology’s comprehensive testing system, the static hysteresis loop tester stands as a critical instrument for characterizing the intrinsic magnetic properties of amorphous and nanocrystalline cores. Through standardized, high‑precision measurements, we can uncover the material’s fundamental performance and proactively identify potential design risks. Today, let us take a closer look at Jiayou Amorphous’s competitive edge in quality, guided by this sophisticated instrument.

Static hysteresis loop testing is a measurement technique used to characterize the B–H curve under quasi‑static magnetic field conditions. By eliminating the interference caused by high‑frequency eddy currents, it enables the recovery of the magnetic core material’s intrinsic magnetic properties. From this complete hysteresis loop, key fundamental parameters such as the saturation magnetic flux density (Bs), coercivity (Hc), remanence (Br), and initial permeability can be accurately determined.

These parameters directly determine the magnetic core’s saturation withstand capability and hysteresis loss under high‑power operating conditions, and they also serve as critical criteria for selecting power‑supply magnetic cores. Unlike dynamic whole‑machine testing, which evaluates a component’s overall performance in real‑world operating conditions, static testing focuses on the material itself, effectively providing the magnetic core with a comprehensive baseline performance assessment.

At Jiayou Amorphous, the static hysteresis loop tester is seamlessly integrated into the entire workflow, from R&D to shipment. Core‑material testing adheres rigorously to standardized procedures, with no shortcuts taken in any stage of the testing process:

👉 Front-end validation during the R&D phase ： During the stabilization phase of the annealing process for low-permeability nanocrystalline and amorphous magnetic cores, we employ a static hysteresis loop tester to compare B–H curves under different process parameters, thereby precisely optimizing permeability and saturation characteristics. We also conduct early validation to ensure that material formulations are suitable for high‑current applications such as energy storage systems, AI‑computing power supplies, and on‑board OBCs, proactively mitigating risks like magnetic saturation at the source.

👉 Sampling inspection during mass production ： In mass production, samples are randomly selected on a scheduled basis and tested on equipment to generate complete B–H hysteresis curves and magnetic parameters. The magnetic performance of each batch is monitored to promptly detect inter‑batch variations, ensuring process stability on the production line and preventing discrepancies where “samples pass inspection but mass‑produced units fail to meet consistency standards.”

👉 Project Issue Root Cause Analysis ： When customers encounter challenges such as inductor voltage drop or magnetic saturation during prototype debugging, we can re‑measure the sample’s static hysteresis loop and compare it with the reference curve, helping to determine whether the issue stems from the material itself or from the circuitry or assembly structure, thereby providing engineers with reliable data support.

A comprehensive quality-control system is never achieved by a single piece of equipment acting in isolation. In addition to static hysteresis-loop testing, Jiayou Laboratory offers a suite of complementary tests, including dual‑85 constant‑temperature and constant‑humidity cycling, high‑ and low‑temperature cycling, dielectric withstand voltage, and dynamic magnetic‑property measurements.

The laboratory is staffed by dedicated personnel assigned to specific roles; test samples are managed with unique identification numbers, and raw test data is archived and retained. Samples exhibiting abnormal parameters are separately isolated for re‑examination. We strictly adhere to testing standards, never lowering acceptance thresholds, and employ rigorous, standardized procedures to ensure the reliable assessment of the fundamental properties of magnetic core materials.

Amorphous and nanocrystalline magnetic cores, serving as the core electromagnetic components in energy‑storage converters, on‑board power supplies, and AI server power supplies, have magnetic parameters whose consistency directly impacts overall system efficiency and long-term operational stability.

At Jiayou Amorphous, we firmly believe that material performance is validated through rigorous testing, while batch-to-batch consistency hinges on robust process control. We eschew subjective judgment and adhere strictly to standardized testing procedures. Backed by state-of-the-art laboratory equipment and a well‑defined testing protocol, we ensure that the intrinsic magnetic properties of every batch of magnetic cores are tightly controlled, perfectly meeting the demanding requirements of high‑power power electronic applications.

In the magnetic materials industry, true core competitiveness lies not only in “what can be manufactured,” but even more so in “what can be measured and what can be controlled.”

Anyang Jiayou Amorphous Technology fully recognizes that the acquisition of cutting-edge equipment is only the foundation; what truly matters is the rigorous testing system and advanced data‑analysis capabilities built around it. Looking ahead, Jiayou will remain driven by technological innovation, continuously upgrading its inspection and testing platform. We will safeguard the quality of every magnetic core with even more precise measurements, leverage breakthroughs in technology to support the steady advancement of the new‑energy sector, and, together with all our partners, explore the boundless potential of magnetic materials across an ever‑broader range of applications.