博文

Common Mode Chokes (CMC)

图片
  A choke coil is an inductor designed to have a very big reactance at a determined frequency or frequency range. The common-mode inductor is essentially a two-way filter: on the one hand, it must filter out common-mode electromagnetic interference on the signal line, and on the other hand, it must restrain itself from emitting electromagnetic interference to avoid affecting the normal operation of other electronic devices in the same electromagnetic environment. Choke coils  are widely used in electronic appliances, like television, air conditioner, refrigerator as well as in many other devices by acting as filters. Common mode choke coils are useful in a broad range of precaution of electromagnetic interference (EMI) and radio frequency interference (RFI) of feed lines and for precaution of malfunctioning of several electronic appliances. Additionally, common mode choke coils are also used in circuits like CC-CC converters and load circuits to reduce the noise resulting from the leak
发表评论
阅读全文

Nanocrystalline Cores Turn Tough Issues Easy

Tough problems have been solved when ferrite cores were replaced by nanocrystalline soft magnetic cores. (1) Noise In the process of working with electrical appliances, noise is mainly generated in the following two aspects: 1. Due to the magnetostriction index of the raw material itself, such as ferrite, noise always occurs in the application. And because of the different composition of nanocrystalline, the magnetostriction index is also different. For example, as the output transformer, voltage transformer,  common-mode f ilter , etc., the use of iron-based nanocrystalline ribbons reduces the magnetostrictive index. According to customer applications, the noise problem has been greatly improved. 2. The problem at the rectifier circuit level, the direct current in the power supply circuit causes the magnetic induction intensity of the transformer core to increase, thereby causing the noise. Tests have proved that noise is directly proportional to the intensity of magnetic induction at
发表评论
阅读全文

Nanocrystalline No Ferrite in 2020

Nanocrystalline No Ferrite in 2020 In switching power supplies, nanocrystalline common mode chokes have better characteristics than ferrite core common-mode chokes, the surge current and spike voltage they generate will form interference sources. If not suppressed, these interferences will cause damage to the load equipment or the switching power supply itself. In EMI filter circuits, the differential mode is often used inductance and common mode inductance is used for corresponding suppression. The differential mode inductance is mainly responsible for filtering out the differential mode interference signal between the two wires of the input or output end, and the common-mode inductance is mainly responsible for filtering out the common-mode interference signal of the two incoming wires. The commonly used  common-mode filters  are mainly ferrite core materials. However, the weakness of ferrite is also obvious, such as poor temperature characteristics, low saturation magnetic induction
发表评论
阅读全文

Advantages of using nanocrystalline in inverter power supply

  Advantages of using nanocrystalline in inverter power supply Nanocrystalline core additionally has these advantages (c omparing with  silicon steel, permalloy, and ferrite cores ): High magnetic induction The magnetic induction in the saturation state is twice that of permalloy and several times that of ferrite cores. The transformer core power is large, which can exceed 15 kW～20kW/kg. High permeability The magnetic permeability of the transformer coil used to output the power is several times that of the ferrite core, which greatly reduces the output power of the excitation current and improves the high efficiency of the transformer. Low loss In the frequency range of 20kHz～50kHz, the loss of the  nanocrystalline core  is 1/2～1/5 of the ferrite core, and it can significantly reduce the heat generation of the transformer core. High Curie temperature The Curie temperature of the nanocrystalline core is 570℃, and the Curie temperature of the ferrite core is only 180℃～200℃. Therefore, t
发表评论
阅读全文

How to Purchase High-Quality Common Mode Chokes(CMC)

图片
  How to Purchase High-Quality CMC Common Mode Chokes The quality of the CMC common mode chokes you use determines the quality of the final product. The failure of a low-quality single component will affect the use of the entire product. High-quality components will improve the durability and reliability of the product and will be widely praised by customers. Therefore, when purchasing  common-mode chokes( CMC ) , it is important to put quality at the top of the checklist. SAT Amorphous  has many years of experience in the design and manufacture of common-mode chokes. Whether manufacturing or sales, we put quality first. Based on our many years of experience in the industry, when purchasing any new components, it is not enough to JUST select a supplier. Research and identification are also needed. Check whether the supplier meets the relevant quality standards. Therefore, the following points can be used to evaluate suppliers: 1. Supplier background investigation: Don't just listen
发表评论
阅读全文

The Application of Amorphous Alloy in Sensor Field 2020

The Application of Amorphous Alloy in Sensor Field 2020   Amorphous soft magnetic material   can reduce energy consumption, minimize the noise of electronic circuits of electrical products, and are also environmentally friendly products. Ordinary alloys have a regular metal crystal structure, while the atoms of amorphous alloys are randomly distributed. Due to this random distribution of atoms, the magnetic properties of amorphous alloys are anisotropic. In addition, the increase in resistivity, the amorphous thin ribbon significantly reduces the eddy current loss, so the magnetic properties are significantly improved. In SAT, we have manufactured iron-based amorphous alloys through a liquid rapid cooling method. This method of rapid cooling at a rate of about one million degrees per second can prevent the metal from solidifying into an amorphous structure instead of a normal ordered crystal structure. Due to the advantages of amorphous structure, amorphous alloy has become a choice fo
发表评论
阅读全文

Common Mode Chokes (CMC) 2020

图片
  How Common Mode Chokes (CMC) Work Let's study the function and operation of common-mode chokes and how to reduce unnecessary interference. Differential interference First, we study differential interference. For differential interference, and for any signal transmitted from the line side, there should be equal returns on the neutral side. Anything that passes through the neutral point (bottom surface) from the line (or top surface) should be crossed off. But the reality is that if there is equal signal cancellation, you won't get any unnecessary noise in differential mode. Differential noise occurs when these types of transmissions are unbalanced and canceled. Common mode noise In the case of common-mode noise, noise enters and releases simultaneously from the two input sides (line and neutral), but it also couples back to the ground. All that needs to be done is to capture harmful noise and prevent it from spreading back to the ground. Therefore, it is necessary to capture t
发表评论
阅读全文