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- [行業(yè)資訊]為何這款無(wú)源晶振ABLS-LR-24.000MHZ-T能得到無(wú)線(xiàn)模塊的青睞？2022年10月19日 11:00
- 為何這款無(wú)源晶振ABLS-LR-24.000MHZ-T能得到無(wú)線(xiàn)模塊的青睞？There are four main sources of heat generation from inductor losses when operating in an application.
They can be categorized into two groups referred to as copper losses and core losses.
1. Copper losses – these are losses primarily due to the inherent DC resistance (DCR) of the inductor’s wire. The wire has a known DC resistance which is a function of the wire length and the cross-sectional area of the wire (aka gauge). The DCR parameter can be found in all the Abracon inductor’s datasheets.
The power dissipated from the effects of the DCR are:
There is, however, a frequency component to copper loss due to what is called the skin effect and
proximity effect. The skin effect is where the electrons traveling through a conductor’s magnetic field are forced towards the outside ‘skin’ of the wire. As frequency increases, the skin effect strengthens causing AC resistance to increase.
The proximity effect further reduces current (increases resistance) due to magnetic fields of adjacent wires within the coil. Inductor coils with more turns and tightly packed windings will be affected greater by the proximity effect. Power dissipation from these AC effects is calculated by taking the RMS value of only the change in current seen by the inductor (sometimes called ripple current), squaring the RMS value and multiplying by the equivalent AC resistance.
AC resistance (ACR) is a difficult parameter to document due to its dependency on so many factors.
Abracon suggests that designers use an empirical method of measuring the copper loss from AC sources like the skin and proximity effects.
在應(yīng)用中運(yùn)行時(shí)，電感損耗產(chǎn)生的熱量主要有四種來(lái)源。
它們可以分為兩類(lèi)，稱(chēng)為銅損失和芯損失。
1. 銅損耗——這些損耗主要是由于電感導(dǎo)線(xiàn)的固有直流電阻(DCR)造成的。導(dǎo)線(xiàn)有一個(gè)已知的直流電阻，它是導(dǎo)線(xiàn)長(zhǎng)度和導(dǎo)線(xiàn)截面積的函數(shù)(又稱(chēng)量規(guī))。而石英晶振低損耗恰好能夠填補(bǔ)，DCR參數(shù)可以在所有Abracon電感器的數(shù)據(jù)表中找到。
從DCR的效果中耗散的能量是:
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