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内地Coilcraft空心线圈优惠平台

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内地Coilcraft空心线圈优惠平台
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First, inductance classification

Classified by inductance form: fixed inductance, variable inductance.

 

According to the properties of magnetic conductivity: hollow coil, ferrite coil, iron coil, copper coil.

 

By working nature: antenna coil, oscillation coil, choke coil, trap coil, deflection coil.

 

According to the structure of winding: single- coil, multi- coil, honeycomb coil.

 

Cary, IL, USA —  Coilcraft’s new Cx Family of surface-mount common mode chokes includes sizes/configurations for a broad range of power line circuits. They suppress high frequency common mode noise up to MHz and offer greater than dB common mode attenuation, * them ideal for use in consumer electronics and industrial applications.

 

All Cx Family  EMI chokes feature a low-profile, toroidal construction in a surface-mount, magnetically-shielded package with footprints as small as x mm. They are available with current ratings up to Amps (Irms) and provide 1000/Vrms isolation (hipot) between windings. They feature RoHS-compliant tin-silver-copper over tin over nickel over phos bronze terminations and withstand a maximum reflow temperature of 260°C.

 

As with all Coilcraft parts, free evaluation samples and complete technical specifications for the Cx Family are available online at JEPSUN Parts are available from stock and can be ordered online at JEPSUN or by calling sales.

Adjustable inductance/molded coil inductance, copper core/aluminum core: the maximum inductance value is at the place where 1/is suspended from the top of the screw; The magnetic core is completely covered by the coil, and the up-regulated sensitivity decreases.

The problem with adjustable inductor/molded coil is the sliding teeth. There is also the frequency problem, the improvement measures are as follows:

1. Magnetic core material replacement, such as copper core replacement, aluminum core, etc.

2. Change the size of the magnetic core. The larger the magnetic core is, the greater the sensing value will be.

3. Change the number of turns. The smaller the number of turns, the higher the frequency.

The larger the size, the greater the sensitivity and the smaller the frequency.

The frequency of adjustable inductor/molded coil increases, but the inductance decreases. The density is large, the density is small.

Production material is copper alloy, copper screw in the latest edition of the ROHS exemption rules, rules of copper alloy of lead not more than 4parts per million (4%) is qualified, there are many customers in found that testing data is thousands or even tens of thousands of panic, when in fact this is within the scope of ROHS, was identified as ring protection, harmless to the human body. Please feel free to use, magnetic screw and a permeability parameters of low permeability, high Q value, quantity is big, the feeling of low frequency; Those with high magnetic permeability have low Q value, low sensitivity and high frequency.

 

The single frequency of molded coil is about 150MHZ, and the frequency will increase correspondingly with different capacitors/cores. The larger the capacitance, the smaller the frequency, and the smaller the capacitance, the higher the frequency.

 

  五使轻负荷时线路中的无功功率尽可能就地平衡,防止无功功率不合理流动。同时也减轻了线路上的功率损失。六在大机组与系统并列时。降低高压母线上工频稳态电压,便于发电机同期并列。电抗器在高压配电系统的作用电力系统中所采取的电抗器,常见的有串联电抗器和并联电抗器。串联电抗器主要用来限制短路电流,也有在滤波器中与电容器串联或并联用来限制电网中的高次谐波。串联电抗器的主要作用是高次谐波和限制合闸涌流,防止谐波对电容器造成危害,避免电容器装置的接入对电网谐波的放大振发生。

  共模滤波器的核心是带有软磁铁芯的共模电感,其性能的高低决定了滤波器的水平。共模噪声和共模电感共模噪声主要是各种开关器件在导通和关断时产生的,可分解为不同的谐波形式,具有宽的频谱范围。对于MHz以下的信号,一般通过传导方式传播。共模电感由软磁铁芯和两组同向绕制的线圈组成,对差模信号,由于两组线圈产生的磁场方向相反,故相互抵消,铁芯不被磁化,对信号没有作用。对于共模信号,由于两组线圈产生的磁场不是抵消,而是相互叠加,因此铁芯被磁化。

 

  根据法拉第电磁感应定律—磁生电来分析,变化的磁力线在线圈两端会产生感应电势,此感应电势相当于一个“新电源”。当形成闭合回路时,此感应电势就要产生感应电流。由楞次定律知道感应电流所产生的磁力线总量要力图磁力线的变化的。磁力线变化来源于外加交变电源的变化,故从客观效果看,电感线圈有交流电路中电流变化的特性。电感线圈有与力学中的惯性相类似的特性,在电学上取名为“自感应”,通常在拉开闸刀开关或接通闸刀开关的瞬间,会发生火花,这自感现象产生很高的感应电势所造成的。

  从同一母线引出的分支馈线上往往串有限流电抗器,以限制馈线的短路电流,并维持母线电压,不致因馈线短路而致过低。电抗器的分类电抗器分类按结构及冷却介质按接法按功能按用途进行分类。电抗器分类按结构及冷却介质分为空心式铁心式干式油浸式等,例如干式空心电抗器干式铁心电抗器油浸铁心电抗器油浸空心电抗器夹持式干式空心电抗器绕包式干式空心电抗器水泥电抗器等。 电抗器分类按接法分为并联电抗器和串联电抗器。 电抗器分类按功能分为限流和补偿。

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