What are the advantages of using a Permalloy core?
2023-03-02
The Permalloy core industry has a promising future because it offers many benefits to businesses, making it a favorite among customers. To help you understand it better, let's discuss the advantages of Permalloy cores. Hopefully, this will be helpful to many.
Many people still lack basic knowledge about Permalloy cores. As a manufacturer, we find it necessary to provide a brief explanation. A key advantage of this Permalloy core is its reduced eddy current loss. This is mainly because the laminated core reduces the loss of other types of iron—"eddy current loss." When working, there is alternating current in the coil, and the magnetic flux it generates is naturally alternating. This changing magnetic flux will induce current in the core. During use, the induced current generated circulates in a plane perpendicular to the direction of the magnetic flux, hence the name eddy current. Eddy current loss also heats the core. To reduce eddy current loss, mutually insulated silicon steel sheets are arranged on an ordinary core, so that the eddy current passes through a smaller cross-section in a narrow and long circuit to increase the anti-eddy current capability. At the same time, the silicon in the silicon steel increases the resistance of the material and also reduces the eddy current. In addition, these Permalloy cores usually use 0.35mm thick cold-rolled silicon steel sheets, cut into strips according to the required core size, and then overlapped into a "sky" or "mouth" shape. Theoretically, to reduce eddy current, the thinner and narrower the silicon steel sheet, the better the effect.
Therefore, this not only reduces eddy current loss and temperature rise but also saves material used for silicon steel sheets. However, in the actual production of Permalloy cores, it's not just about the above-mentioned advantageous factors, because this method of core production will increase the labor hours of many people and reduce the effective cross-section of the core. Therefore, when using Permalloy cores, it is necessary to weigh the pros and cons and choose the appropriate size according to the specific situation. In addition, it also significantly improves work efficiency. It is actually designed based on the principle of electromagnetic induction. There are two windings on the closed Permalloy core: a primary winding and a secondary winding. The primary winding is connected to an AC power supply voltage. The original magnet has AC electricity, and the magnetomotive force is established. Under the action of the magnetomotive force, the main alternating magnetic flux is generated in the core. The main magnetic flux passes through the primary and secondary windings of the core, mainly electromagnetic induction, and induces electromotive force in the primary and secondary windings respectively. Why can it be used for strengthening now? Then use Lenz's law to explain.
After the above introduction, we have a better understanding of the advantages of Permalloy cores. We will no longer feel unfamiliar with it and will not encounter frequent problems during use. That's all for today's content. We believe it will bring more exciting knowledge points.
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