Transmart - Professional Transformer Core Manufacturers In China Supplying Custom Nanocrystalline Core And Toroidal Transformer Core

What is the role of magnetic ring inductance? -

by:Transmart     2023-01-14

Everyone knows that inductors are electromagnetic induction components wound with insulated wires, and are commonly used components. So what is the inductance of the magnetic ring? What is the main function? When it comes to the inductance of the magnetic ring, we start with the magnetic ring. The magnetic ring and the connecting cable form an inductor. High-frequency noise has a good shielding effect, so it is called an absorbing magnetic ring. Since it is usually made of ferrite materials, it is also called a ferrite magnetic ring (abbreviated as a magnetic ring). We know that the magnetic ring has different impedance characteristics at different frequencies. At low frequencies, the impedance is very small, and when the signal frequency increases, the impedance of the magnetic ring increases sharply. We all know that the higher the frequency of the signal, the easier it is to radiate out, and the general signal lines have no shielding layer, these signal lines become good antennas, receiving various messy high-frequency signals in the surrounding environment, and These signals are superimposed on the originally transmitted signal, and may even change the originally transmitted useful signal, seriously interfering with the normal operation of electronic equipment. the

Therefore, it is very necessary to reduce the electromagnetic interference (EM) of electronic equipment. Under the action of the magnetic ring, it can not only make normal and useful signals pass smoothly, but also suppress high-frequency interference signals well. Not only that, but also its low cost is another advantage. What is the role of inductance? We say that passing through DC and blocking AC is an easy-to-understand term. It can isolate and filter AC signals or form a resonant circuit with capacitors and resistors. In addition, inductance also plays an important role in screening signals, filtering noise, stabilizing current and suppressing electromagnetic wave interference. 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 inductive reactance and capacitive reactance of the circuit are also equal, so the electromagnetic energy oscillates back and forth between the inductance and capacitance, which is the resonance phenomenon of the LC circuit. the

When resonating, because the inductive reactance and capacitive reactance of the circuit are equivalent and 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), so the LC resonant circuit has the function of selecting the frequency and can An AC signal of a certain frequency f is selected. the

What testing items are there for the magnetic ring inductance? 1. Check the package size: first test the package size, because the space reserved for the inductor on the customer's circuit board has been determined, so the package size must meet the requirements before it can be correctly installed on the circuit board. The detection of package size is very simple, just use a vernier caliper to measure; 2. Magnetic ring inductance performance test: After testing the package size, it is necessary to test the magnetic ring inductance performance parameters. Generally, the performance parameters that need to be measured are: the resistance value of the magnetic ring inductance, the inductance value, etc., and the performance parameter test must use professional testing instruments; Requirements, such as requirements for pin length. If the length of the pin exceeds the requirement, the corner must be cut. The length of the pin does not affect the inductance performance of the ferrite inductor, but if the pin is too long, it may be necessary to cut the angle when installing it in the circuit.
Custom message
Chat Online 编辑模式下无法使用
Leave Your Message inputting...