Electromagnetic Induction Principle of Inductive Coil of Magnetic Rod

In electronic equipment, it is often seen that many magnetic rings and connecting cables constitute an inductor. The magnetic rod inductance coil is a common anti-interference element in electronic circuits. It has a good shielding effect on high frequency noise. So it is called absorption magnetic ring. Because it is usually made of ferrite material, it is also called ferrite magnetic ring. Magnetic rod inductance coil is widely used in mobile phones, notebook computers, handheld computers, computer graphics cards, LED, MP3, MP4, network cards, network communications, office equipment, wireless transceivers, TV sets, anti-theft equipment, LCD backlight, power module, security products, automobiles, electronic watches, Bluetooth, cold lights, medical equipment and other technical fields.

The induction system of magnetic rod inductance coil mainly adopts the principle of electromagnetic induction. The energy transfer is realized by energy coupling of coils. When the system works, the input converts the AC municipal power into DC through the full bridge rectifier circuit, or directly supplies power to the system with 24V DC terminal.

The DC output from the inductance coil of the magnetic rod is converted into high frequency AC primary winding by 2M active crystal oscillator inversion after it passes through the power management module. Through the energy of inductance coil of two magnetic rods, the output current of secondary coil is changed into DC current by receiving and converting circuit to charge the battery. Therefore, the magnetic rod inductance coil occupies a vital position in the wireless charger, which directly determines the quality of the wireless charger.

Magnetic rod inductance coil is commonly known as skeleton-free hollow coil, multi-layer arrangement, and widely used. There are solar energy swing coil, coin thrower induction coil, IC card induction coil, voice coil (horn coil), steering coil for remote control vehicle, coil for gliding toys, coils for various electronic drives and so on. The magnetic rod inductance coil can be divided into circular coil, square coil, runway coil, polygon coil and other shapes according to its shape. The coil of super large and super long lead-out wire can be specially produced. Inductance coils of various magnetic rods winded by insulated conductors are called inductances. An electronic component that generates a certain amount of self-inductance by winding wires into one or more turns, often referred to as an inductance coil or coil for short.

Magnetic rod inductance coil is widely used in electronic circuits. It is one of the main components to realize oscillation, tuning, coupling, filtering, delay and deflection. In order to increase inductance, increase Q value and reduce volume, magnetic cores are often inserted into coils. In high frequency electronic equipment, a special copper sheet on the printed circuit board can also form an inductor, which is usually called a printed inductor or microstrip line.

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