A Brief Introduction to the Principle of Use of Inductance Coils

时间： 2024-10-30 来源：Fine Official Website

技术问答

选型帮助

研发客服

商务客服

Inductance is the ratio of the magnetic flux of the wire to the current that produces this magnetic flux when alternating current is passed through the wire.

When a DC current passes through the inductor, there are only fixed magnetic lines of force around it, which do not change with time; but when an alternating current is passed through the coil, it will show magnetic lines of force around it that change with time. According to Faraday's law of electromagnetic induction-magnetism generates electricity, the changing magnetic field lines will generate an induced electric potential at both ends of the coil. This induced electric potential is equivalent to a "new power source". When a closed loop is formed, this induced potential will produce an induced current. It is known from Lenz's law that the total amount of magnetic field lines produced by the induced current is to try to prevent the original magnetic field lines from changing. Since the original magnetic field line changes originate from the change of the external alternating power supply, from the objective effect, the inductance coil has the characteristic of preventing the current change in the AC circuit. Inductance coils have characteristics similar to inertia in mechanics. They are called "self-induction" in electricity. Usually, when the knife switch is opened or the knife switch is turned on, sparks will occur. This is the phenomenon of self-induction. Caused by a very high induced potential.

In short, when the inductance coil is connected to the AC power supply, the magnetic field lines inside the coil will always change with the alternating current, causing the coil to continuously produce electromagnetic induction. This kind of electromotive force generated by the change of the coil's own current is called "self-induced electromotive force".

It can be seen that the inductance is only a parameter related to the number of turns, size and shape of the coil and the medium. It is a measure of the inertia of the inductor and has nothing to do with the applied current.

发送到邮箱 |
+1 赞 0
收藏
评论 0
| 转发至：

本文由梨花落风转载自Fine Official Website，原文标题为:A brief introduction to the principle of use of inductance coils，本站所有转载文章系出于传递更多信息之目的，且明确注明来源，不希望被转载的媒体或个人可与我们联系，我们将立即进行删除处理。

全部评论（0）

暂无评论

The Role of Inductance Coil

Resistance, capacitance and inductance, they all present a certain resistance to the flow of electrical signals in the circuit. This resistance is called “impedance“. The impedance presented by the inductor to the current signal uses the self-inductance of the coil.

技术探讨发布时间 : 2024-10-31

Inductor Coil Structure and Characteristics

The inductance coil is generally composed of a magnetic core or iron core, a skeleton, a winding group, a shielding cover, and packaging materials.

技术探讨发布时间 : 2024-10-31

Understanding Inductance Coils: Principles, Types and Selection

Inductance coil is a device that uses the principle of electromagnetic induction to work. When a current flows through a wire, a certain electromagnetic field will be generated around the wire, and the wire of this electromagnetic field will induce the wire within the range of this electromagnetic field.

技术探讨发布时间 : 2024-10-30

Inductance Coils ISO 14001:2015 ACM CERTIFICATE (21ACM00312E)

测试报告 - 泛亚 - 27/4/2021 PDF 英文下载

Inductor coil manufacturers tell you the role of inductance coils

Choke effect: The self-induced electromotive force in the inductance coil always counteracts the current change in the coil. The inductance coil has an obstructive effect on the alternating current, and the size of the obstructive effect is called the inductive reactance xl, and the unit is ohm. Its relationship with inductance l and alternating current frequency f is xl=2πfl, and inductors can be mainly divided into high-frequency choke coils and low-frequency choke coils. Tuning and frequency selection: The inductance coil and the capacitor are connected in parallel to form an lc tuning circuit. That is, the natural oscillation frequency f0 of the circuit is equal to the frequency f of the non-AC signal, and the inductance and capacitive reactance of the loop are also equal, so the electromagnetic energy oscillates back and forth between the inductance and the capacitance, which is the resonance phenomenon of the lc loop. At resonance, the inductive reactance and capacitive reactance of the circuit are reversed. The inductive reactance of the total loop current is the smallest and the current is the largest (referring to the AC signal of f="f0"). The lc resonance circuit has the function of selecting the frequency and can An AC signal of frequency f is selected.

技术问答发布时间 : 2024-10-30

Inductance coil manufacturers tell you what are the commonly used inductance coils?

①Single layer coil,②honeycomb coil③ ferrite core and iron powder core coil④ copper core coil⑤color code inductor⑥choke coil ⑦deflection coil

技术问答发布时间 : 2024-10-30

What are the Classifications of Commonly Used Inductance Coils?

Inductance coils, devices utilizing electromagnetic induction, are classified into various types. Based on inductance form, they are fixed and variable. By magnetic conductor, they are air core, ferrite, iron core, and copper core. By function, they include antenna, oscillating, choke, trap, and deflection coils. By winding structure, they are single-layer, multi-layer, honeycomb, etc.

技术探讨发布时间 : 2024-10-29

The Inductor Coil Manufacturer Briefly Describes the Performance Indicators of the Inductor Coil for You

The inductance of an inductor coil is a key performance index, determined by factors such as the number of turns, winding method, and presence of a magnetic core. The basic unit of inductance is Henry (H), with common units including millihenry (mH) and microhenry (μH). Inductance coils also exhibit inductive reactance and a quality factor (Q) related to their efficiency. Distributed capacitance and rated current are also important considerations.

技术探讨发布时间 : 2024-10-30

泛亚（Fine）无线充电线圈选型指南

目录- 无线充电线圈选型表

选型指南 - 泛亚 PDF 中文下载

空心线圈/感应线圈定制

可定制空心线圈的尺寸，大尺寸可做到：300mm*200mm；小微型：φ1.5mm*8mm。内外径公差尺寸控制在最小0.01mm，电感公差可控制到±2.5%，空心线圈内径最小可以做到0.3mm。

服务提供商 - 泛亚进入

What Is the Wireless Charging Coil Receiving Ring

The wireless charging coil uses a transmitting coil to send electric energy through electromagnetic fields to a receiving coil, which stores the current. This technology boasts a higher conversion rate and lower loss than wired charging. The core chip controls precise radiation range, magnetic field frequency, etc. The magnetic field is safe for humans. With advancements in electronic technology, mobile phone wireless charging will become widespread. The technology uses magnetic resonance and can be applied in various fields.

技术探讨发布时间 : 2024-10-30

泛亚（Fine）成立于2009年，是一家专注于定制线圈的研制、开发、生产及销售为一体的高新技术企业。泛亚全系列产品实行符合ROHS标准的无铅化生产，并定期将产品和原材料送第三方机构（SGS）测试，以确保产品符合ROHS标准。拥有无线充线圈、自粘线圈、空芯线圈、扼流线圈、SMD功率电感、模压线圈、色环电感、可调电感、片式电感、片式磁珠、贴片中周、立式电感等系列产品。

授权代理商 - 深圳市世强元件网络有限公司线上商城技术资料

展开

朗能泛亚产品介绍

商品及供应商介绍 - 朗能泛亚 - 2022/6/22 PDF 中文下载

The World‘s Top Strong Magnetic Field Is Built in China: the Coil Life Is Nearly Doubled, and the Power Supply Is Cheap and Powerful

This website is about Sino-Fine Chemical Co., Ltd., a company specializing in the production of food additives and pharmaceutical intermediates. It introduces the company‘s history, production capacity, and quality management system. Highlights include advanced production equipment, a complete quality assurance system, and compliance with international standards. The company aims to provide high-quality products and services to customers worldwide.

行业资讯发布时间 : 2024-10-30