How to optimize the core material and structure of shielded inductor to improve the stability and accuracy of its inductance value while reducing the core loss?
Publish Time: 2024-08-18
Shielded inductor plays an important role in electronic circuits, and optimizing its core material and structure is crucial to improving performance.
In the selection of core materials, multiple factors need to be considered comprehensively. Materials with high magnetic permeability and low hysteresis loss can be selected, such as ferrite, nanocrystalline alloy, etc. These materials can obtain higher inductance values at a smaller core volume, while reducing the energy loss of the core during magnetization and demagnetization. For the optimization of the core structure, a multi-layer sheet structure can be used. By dividing the core into multiple layers of thin sheets, eddy current loss can be reduced. The insulation treatment between the thin sheets can effectively prevent the formation of eddy currents, thereby reducing core heating and energy loss.
In the shape design of the core, the use of a closed magnetic circuit structure can reduce leakage magnetic flux and improve the stability and accuracy of the inductance value. For example, a toroidal core can make the magnetic lines of force pass through the core more concentratedly, reduce the leakage of the magnetic field, and enhance the performance of the inductor. Optimizing the air gap of the core is also one of the keys. Reasonable setting of the size and position of the air gap can adjust the inductance value and improve the linearity of the inductance under different currents. Through precise calculation and experimental verification, the optimal air gap parameters are found to meet the requirements of the inductance value and reduce the core loss. In addition, the core can also be surface treated. For example, coating or plating technology is used to increase the insulation performance of the core and reduce eddy current and hysteresis losses.
During the production process, the composition and manufacturing process of the core material are strictly controlled to ensure the consistency of the material and the accuracy of the core structure. At the same time, the magnetic field distribution and energy loss of the core are simulated and analyzed with the help of advanced simulation software. The performance of the core can be predicted and optimized in the design stage, reducing the number and cost of actual tests.
In summary, by carefully selecting the core material, optimizing the core structure, reasonably setting the air gap, performing surface treatment, and strictly controlling the production process, combined with simulation analysis, the inductance stability and accuracy of the shielded inductor can be effectively improved, while the core loss can be significantly reduced, meeting the needs of electronic equipment for high-performance inductor components.
